publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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1975-01-01 | Of all the possible aspects of σ_w and its changes, the dependence upon temperature takes a special place. It is the only effect which can (and does) also effect the shift of an isolated molecule. Since σ _ w is defined as σ_w = σ _ liq - σ_0 - σ_b, not only must the bulk susceptibility term be calculated at the approp... | The Temperature Dependence of σ_w
| null |
1975-01-01 | As an interdisciplinary science, gerontology now includes sociology, psychology, physiology biochemistry and morphology. Biological gerontology is regarded as a relatively young discipline. It has a predominant interest in genetic, molecular and cellular mechanisms of aging rather than a cybernetic or systems approach ... | Neurochemical Changes in Composition, Metabolism and Neurotransmitters in the Human Brain with Age | null |
1975-01-01 | Fundamental Criteria, Data or Facts of Biological Aging. The deterioration or “aging” of objects, animals and human beings with the passage of time is one of the most universal, inevitable and conspicuous features or characteristics observable in nature. With the passage of time, changes occur in the properties, organi... | Principles of Mammalian Aging | null |
1974-12-01 | The dynamics of a gravity spin two field system is analysed when linear antisymmetric formulations for the ‘matter’ field is assumed and the minimal prescription for the interaction is made. It is shown that this interacting system is equivalent to a non-minimally coupled spin-two field when it is given in terms of the... | Gravidynamics of linear spin two neutral fields | null |
1974-12-01 | A brief survey is presented here of studies contributing to the theory of synchrotron radiation and several quantum effects which accompany the motion of electrons in a magnetic field. Equations which describe the amplitude characteristics of radial and axial oscillations of an electron moving in a nonuniform magnetic ... | Evolution of the theory of a “luminous” electron | null |
1974-09-01 | The periodic addition of the sodium salt of ethylenediaminetetraacetate to the diet of albino rats, starting when the animals have reached maturity, increases the mean and maximal life span although analysis of the causes of death, revealed a higher incidence of neoplasms in these rats. The addition of the compound to ... | Life span and causes of death of albino rats after prolonged intermittent feeding with ethylenediaminetetraacetate | null |
1974-07-01 | The impurity spin polarization, static susceptibility, and longitudinal impurity spin relaxation rate are calculated for the s-d model as function of temperature and magnetic field for ferromagnetic and antiferromagnetic exchange coupling. The thermodynamic functions and the dynamical susceptibility are obtained from t... | On the longitudinal static and dynamic susceptibility of spin-1/2 Kondo systems | null |
1974-05-01 | Hydrogen, deuterium, and carbon-13 nuclear spin systems have been studied in partially deuterated 1,2-ethanediol (CD_2OH)_2, doped with paramagnetic Cr^v complexes, between 0.1 and 0.5 K, using the technique of dynamic polarization. Various steady-state and transient measurements demonstrate the existence of a thermal ... | Dynamic polarization of protons, deuterons, and carbon-13 nuclei: Thermal contact between nuclear spins and an electron spin-spin interaction reservoir | null |
1974-04-01 | We find that the quality of the fits of the UPA t -matrix to the exact t -matrix for a given potential do not depend strongly on specific features, such as locality or inclusion of spin orbit forces in the potential. The accuracy of the UPA fits suggests the employment of t -matrix perturbation theory in triton ground ... | Unitary pole approximation andt-matrix perturbation theory in triton calculations | null |
1974-03-01 | Spin waves in an isotropic antiferromagnet are described using a decoupling scheme for the Green's functions in the paramagnetic region. The results are interpreted with an ansatz for the scattering function suggested by Halperin and Hohenberg and show overdamping in a hydrodynamic region and damped propagating spin wa... | Spin waves in the isotropic heisenberg antiferromagnet above the Néel point | null |
1974-01-01 | The dynamics of the solvation sphere of several Mn(II) and Fe(III) complexes have been investigated with the Electron Spin Resonance (ESR) technique. The correlation times for the fluctuation of the Zero-Field Splitting components have been derived from the temperature and frequency dependence ( X -, Q -, and S-band) o... | Electron Spin Relaxation in the Study of the Motions of Paramagnetic Probes in Liquids | null |
1974-01-01 | Colemanite | null | |
1974-01-01 | Previous work on the redshift-magnitude banding correlation is briefly reviewed. New tests of the concept are applied successfully to a second cluster (A2199) and the outer portions of the Coma cluster. Using more than 200 redshifts in Coma, Perseus, and A2199 the presence of a distinct band-related-periodicity in reds... | Fine Structure within the Redshift-Magnitude Correlation for Galaxies | null |
1974-01-01 | The near-ideal one-dimensionality of the linear-chain antiferromagnet (CH_3)_4NMnCl_3 (TMMC) was first demonstrated by Dingle et al .^1 in their study of its susceptibility and optical properties. They showed that the susceptibility could be accurately fitted from room temperature down to about 10°K using Fisher’s^2 ex... | Fluctuations in One-Dimensional Magnets: Low Temperatures and Long Wavelengths | null |
1974-01-01 | Three questions of particular interest in relation to isotopic impurities in solid helium are as follows: (a) Does the impurity move about at low temperatures by exchanging places with host atoms, and if so, what is the tunneling frequency compared with that between a pair of neighboring host atoms? (b) Assuming the im... | NMR Measurements on ^3He Impurity in Solid ^4He | null |
1974-01-01 | We consider an infinite array of ions, each fixed at a point of the lattice Z^v,v = 1,2 or 3. Each ion has no degrees of freedom except its spin, 1/2, which is described by a spinor , that is a unit vector in $$C^2 ,\left( {\mathop {\dot 1}\limits_0 } \right)$$ denoting spin up, ↑, and $$\left( {\mathop 1\limits^0 } \r... | Spin-Wave Scattering | null |
1974-01-01 | Spin-labeling studies employ nitroxides with the following general structure: (see also Fig. 8.1). | Spin-Label Probes | null |
1973-10-01 | Diffusion of nitroxyl spin probes in micellar detergent solutions | null | |
1973-07-01 | The memory kernel of the longitudinal dynamical impurity susceptibility is calculated as a function of frequency, magnetic field, and temperature up to third order in the exchange coupling of the s-d model. It is shown that the strong retardation effects for the spin relaxation due to freezing out of the spin-flip scat... | Retardation effects in the longitudinal spin relaxation in metals. II | null |
1973-01-01 | A discussion of the general theory of spin glasses and specifically, how the ideas of Anderson, Halperin and Varma on low-energy excitations in real glasses may be made applicable to random spin arrangements, will be presented. Attention will be called to the phonon-spin wave analogy. The work of Kok and Anderson on ac... | Topics in Spin Glasses | null |
1973-01-01 | Law and Order in Magnetic Glasses | null | |
1973-01-01 | We consider the system to be governed by a Heisenberg spin Hamiltonian with vanishing external field, i.e. u→0 1 $$H = A\sum\limits_{f,p} {J(f,p)} {S_f}.{S_p} - \mu \sum\limits_I {S_f^z} $$ Here A=−1 for the ferromagnetic case and +l for the antiferromagnetic case. The exchange integral between any site p and its surro... | Amorphous Ferro- and Antiferromagnetism Within an RPA-CPA Theory | null |
1973-01-01 | There are four absolutely conserved quantum numbers in elementary particle physics; these are Q, the charge, B, the baryon number, L, the lepton number and M, the muon number. The following table shows the values these quantum numbers take in various states. | Gauge Theories and Superselection Rules | null |
1973-01-01 | It would be surprising if there was a scientist active today who did not often find himself in a position of having to describe to a lay public, nay even to justify, the nature of his scholarly activity. Although the phenomenon which is the subject of this volume may be described as “Cold Light”, to the layman an expla... | Mechanisms of Chemiluminescence and Bioluminescence | null |
1973-01-01 | A paramagnetic crystal comprises a spin system which is strongly coupled to the crystal lattice. There is a continuous transfer of energy between the spins and the lattice (part of the externally supplied heat is lost to the heat bath), leading eventually to the establishment of thermodynamic equilibrium. The dynamics ... | Relaxation Processes in Paramagnetic Crystals | null |
1973-01-01 | Demodex caprae populations develop within papules in the skin of the dairy goat, Capra hircus . Nutting and Lebel (1969) described the sequence of events in growth and decline of these papules. Invasion of the hair follicle by one to several adult mites is followed by reproduction and harvesting of follicular epithelia... | Population Dynamics of a Parasitic Mite Demodex Caprae (Trombidiformes: Demodicidae) | null |
1972-12-01 | The kinetics of ligand substitutions in the cupric complexes where a diethyldithiocarbamate (dtc^−) is replaced by a diethyldithiophosphate (dtp^−) has been studied with chloroform as solvent. The relative concentrations of the paramagnetic species produced in the reactions have been determined using electron spin reso... | Electron spin resonance studies of the ligand exchange in cupric complexes with diethyldithiocarbamate and diethyldithiophosphate as ligands | null |
1972-09-01 | Possibility of self-stabilizing resonance conditions in dynamically polarized nuclear spin systems | null | |
1972-08-01 | This paper contains a straight-forward spin stability analysis of a composite body composed of a platform, rotor and unbalancing mass. The system is considered to be in a torque-free environment. The stability region for the high spin rotor system is obtained from the linearized momentum equation by the method of first... | On the stability of dual-spin bodies with unbalancing mass | null |
1972-07-01 | We investigate the decay of initial correlations in a spin system where each spin relaxes independently by an intramolecular mechanism. The equation of motion for the spin density matrix is assumed to be the Redfield equation, which is of the form of a quantum mechanical master equation. Our analysis of this problem is... | Decay of correlations in spin systems | null |
1972-01-01 | A method to detect EPR and NMR signals with a nonlinear oscillator is described. From the changes in the oscillator waveform due to absorption the shape of the resonance lines can be reconstructed analytically. This is performed using system theory including the dynamics of the spin system and of the detecting oscillat... | EPR and NMR detection by the nonlinear classical oscillator operating far from sinusoidal region | null |
1972-01-01 | Linear response theory is a powerful tool for interpreting and predicting the results of macroscopic experiments which measure transport and relaxation properties of non-equilibrium systems. The application of linear response theory proceeds in several steps, each of which yields more useful and detailed information co... | Linear Response Theory and Spin Relaxation | null |
1972-01-01 | The rotational diffusion of paramagnetic species in dilute solution is often responsible for the relaxation of the electron spin and hence broadening of the lines in the electron resonance spectrum^1. Of course, spin relaxation can only occur if the magnetic interactions are anisotropic for then, as the molecule rotate... | Electron Spin Relaxation in ^6S State Ions | null |
1972-01-01 | The dominant spin relaxation process for many paramagnetic species in fluid solution results from the anisotropy in the magnetic interactions coupled to the molecular rotational diffusion.^1 Rotation of the molecule modulates the energies of the spin levels and also induces transitions between them. The line broadening... | Electron Spin Relaxation in Liquid Crystals | null |
1972-01-01 | Differential thermal analysis of lignin combined with other methods of investigation leads to the conclusion that the temperatures of endo- and exothermic effects of lignin depend on the quantitative ratio of separate structural bonde in a given preparation resulting from the method of lignin isolation from wood. The l... | Thermal Nalysis of Lignin | null |
1971-12-01 | The equations of motion are derived for the case of a spinning satellite which has a central rigid body, and long flexible appendages which are nominally in the spin plane. The ‘major-axis theorem’ is found to be necessary, but not sufficient for this case, and appropriate sufficiency criteria are derived from a Liapun... | Liapunov stability of spinning satellites with long flexible appendages | null |
1971-12-01 | Zur Erforschung der Resorption und der schleichenden Substitution von radiosterilisierten (Dosis: 3,3 Mrad) Knochentransplantaten bei Kaninchen und Hunden wurde die Technik der elektronischen Drehresonanz (ESR) angewendet. Als biologische Markierung diente das stabile ESR-Signal, welches aufgrund des bestrahlungsbeding... | Application of the electron spin resonance technique for quantitative evaluation of the resorption rate of irradiated bone grafts | null |
1971-06-01 | The effect of conduction electron spin diffusion on linewidth, lineshift and residue of the spin resonance in local moment systems is investigated. For the calculation of the transverse susceptibility a previously established kinetic equation approach is used. Low temperature Kondo-type anomalies of spin relaxation and... | Effect of spin diffusion on the spin resonance in local moment systems | null |
1971-03-01 | The ostracod fauna of Baltic brackish-water rockpools is made up of two groups: permanent members of the pools, and occasional guests from the littoral zone. The former group consists of Heterocypris salinus, H. incongruens and Cypridopsis aculeata . These species are characterized by rapid development (which starts wh... | On the ecology of Heterocypris salinus, H. incongruens and Cypridopsis aculeata (Crustacea: Ostracoda) from Baltic brackish-water rockpools | null |
1971-03-01 | Linear response theory is developed for systems whose time dependence is described by a master equation. The fluctuation dissipation theorem expressing the linear response of the system in terms of fluctuation properties of the system in equilibrium is derived. The time-dependent Ising spin system in interaction with a... | Linear response theory for systems obeying the master equation | null |
1971-03-01 | Magnetic charge, holonomy and characteristic classes: Illustrations of the methods of topology in relativity | null | |
1971-01-01 | The study of the effects of ionizing radiations on both growing and adult CNS appears as an aspect directly related to the general theme of this Handbook, since it refers to the “radiobiochemical lesion” of the neuroaxis. Such effects can resemble those produced by other noxious agents. Because we deal here with the in... | Effects of Ionizing Radiation | null |
1971-01-01 | Recently, several new techniques have been used with far-infrared measurements. That the use of other physical tools complements measurements made in the mid-infrared region has been well documented in the literature. Examples of the use of diffraction techniques, nuclear magnetic resonance, chromatographic methods, Ra... | New Techniques Used with Far-Infrared Measurements | null |
1971-01-01 | In addition to the traditional spectroscopic methods in chemical physics [ 1–3 ] nuclear magnetic resonance (NMR) experiments provide a powerful tool for the research of molecular motion and reorientation in any sample with nuclear magnetic dipoles. It has been shown in many earlier papers and monographs (see for insta... | Nuclear Magnetic Relaxation Spectroscopy | null |
1971-01-01 | Scientific revolutions have been described as episodes in the history of science in which old empirical research activities, standards of achievement, problem fields and even ontologies have been exchanged for new (Kuhn, 1962; Feyerabend, 1962). | Ontological and Terminological Commitment and the Methodological Commensurability of Theories | null |
1970-12-01 | Une étude expérimentale et théorique a été faite sur la relaxation spin réseau (RSR) de la molécule O_2 ^− dans les halogénures de potassium. On a mesuré le taux de relaxation par plusieurs methodes entre 1.32°K et 36°K avec un 3 cm-ESR spectromètre. Les résultats indiquent qu'un processus à un phonon avec une large an... | Spin-lattice relaxation of the O_2
^− molecule-ion in the potassium halides | null |
1970-10-01 | Si studia il comportamento di un sistema comprendente N molecole a due livelli che interagiscono con un modo singolo del campo di radiazione, tramite la meccanica quantistica senza la teoria delle perturbazioni (rappresentazione di interazione) nel caso della risonanza esatta. Si trascurano collisioni fra molecole ed u... | Oscillations in a system comprisingN two-level molecules and a radiation field | null |
1970-07-01 | Quarks with complex spin | null | |
1970-04-01 | The isothermal elastic constants and the coefficient of anomalous thermal expansion of a magnetic lattice are discussed. The spin system is described by the Ising model with an exchange coupling depending on lattice spacing. A behavior of the elastic constants and the coefficient of thermal expansion is found which is ... | Elasticity of a magnetic lattice near the magnetic critical point | null |
1970-03-01 | We have studied the relaxation of the n -spin correlation function < σ ^( n )> and distribution function P _n( σ ^( n ); t ) for the Glauber model of the one-dimensional Ising lattice. We find that new combinations of correlation functions ( C -functions) and distribution functions ( Q -functions) are more useful in di... | Decay of correlations. III. Relaxation of spin correlations and distribution functions in the one-dimensional ising lattice | null |
1970-03-01 | De l'ensemble des coefficients harmoniques du développement du géopotentiel [3, 6, 7], calculé à partir des variations des éléments orbitaux des satellites, on a calculé les paramètres de l'ellipsoïde terrestre triaxial, représentant la surface du géoïde. La solution fut effectuée par méthode analytique sous la conditi... | Best-fitting tri-axial earth ellipsoid parameters derived from satellite observations | null |
1970-01-01 | The study of inelastic neutron scattering in crystals enables us to investigate the energy spectrum of lattice vibrations (atomic and magnetic), and in particular to establish the dispersion law for the elementary excitations of the magnetic crystal, phonons and spin waves. This may be done on account of the fact that ... | Dynamics of the Magnetic Lattice | null |
1970-01-01 | Unitary representations of lie groups in quantum mechanics | null | |
1970-01-01 | The differential equations of motion in classical continuum mechanics are usually derived from the law of conservation of mass (equation of continuity), and from the Euler’s laws of balance of momentum and moment of momentum. Since we postulate here the validity of these laws, we regard them as principles. | Balance and Conservation Principles | null |
1970-01-01 | A summary is given of the theory of electron paramagnetic resonance (ESR) in dilute magnetic alloys. The condition for the existence of the so-called ESR ‘bottleneck’ is precisely stated. The magnitude of the temperature dependence of the ESR linewidth, and its angular dependence for anisotropic host metals, serve as a... | Electron Spin Resonance in Dilute Magnetic Alloys | null |
1970-01-01 | In previous chapters we examined the connection between the structure of organic molecules and the parameters of the NMR spectra, namely, the chemical shifts and the spin—spin coupling constants. The determination of these parameters is quite simple when the substance investigated gives a simple spectrum of the first o... | Analysis of Complex Nuclear Magnetic Resonance Spectra | null |
1969-10-01 | The time-dependent Bogoliubov Equations — which are derived in a slightly generalized form — are applied to the problem of quasiparticle reflection from the phaseboundary between a normal and a superconducting region. The momentum balance of current flow through the boundary is discussed. The supercurrent induced by a ... | Dynamics of current flow through the phase-boundary between a normal and a superconducting region | null |
1969-08-01 | Indefinitely rising trajectories and gell-mann’s program | null | |
1969-04-01 | Si dimostra che si può identificare l’algebra SL _2, c che genera la traiettoria di massa zero con l’algebra abbracciata dagli integrali spaziali di componenti appropriate delle correnti vettoriali e vettoriali assiali. Si generalizza poi quest’algebra in modo da includere le simmetrie interne e si trova che essa è un’... | Algebra of observables and tribes of regge poles | null |
1969-03-01 | The results of Chernous'ko are extended numerically in order to investigate the character of locked-in rotational motion for orbits of arbitrary eccentricity. It is found that for certain ranges of eccentricity, the rotational lock for the higher spin rates in stronger than that of a 1/1 rotational lock in a circular o... | Rotational locks for near-symmetric satellites | null |
1969-03-01 | The cladoceran Daphnia pulex obtusa (K urz ) S courfield was cultivated individually under laboratory conditions and fed in the first series of experiments with dry edible yeast, in the second one with the chlorococcacean alga Scenedesmus abundans , in both cases in three concentrations of food and in 10 parallel vials... | Quantitative relations of the feeding and growth of Daphnia pulex obtusa (Kurz) Scourfield | null |
1969-02-01 | Le proprietà di simmetria del fotone sono differenti da quelle che ci si aspetterebbe a prima vista per una particella di Goldstone appartenente ad una degenerazione dello stato fondamentale rispetto al gruppo degli isospin. Ma la violazione di questo gruppo è di una natura molto speciale nella fisica delle particelle ... | Magnons in a model with antiferromagnetic properties | null |
1969-02-01 | Приводятся ограничения на спиновые матрицы плотности, обусловленные внутвенней симметрией для двух-частичных реакций, для частиц с проиэвольным спином. Исследуются поляриэационные данные для π N реакций при высоких Энергиях, чтобы получить, что наблюдаемые величины, по-видимому, являются максимально воэможными величина... | Conditions on the spin-density matrices due to internal symmetry | null |
1969-02-01 | Information on growth, gained from individually marked animals, is provided for at least one species of each of the families Trochidae, Neritidae, Strombidae, Cypraeidae, Thaisidae, Fasciolariidae, Vasidae and Conidae. Except in the cowries and strombs, which have determinate growth, shell growth is adequately describe... | Growth rates and longevity of some gastropod mollusks on the coral reef at Heron Island | null |
1969-01-01 | More than fifty years ago, Einstein showed that induced transitions between a given pair of energy states occur with equal probability in each direction. At microwave frequencies one can consider merely the effect of a radiation field stimulating transitions in each direction with equal probability, and neglect the eff... | Spin-Lattice Relaxation Phenomena | null |
1969-01-01 | The design curves for TE _01 n dielectric cavity resonators, the quality factor, and the effective volume are computed from the characteristic equation of a hollow dielectric cylinder. A method for measuring relative values of the effective volume of different cavities is described. In an X -band electron spin resonanc... | The dielectric cavity resonator applied to electron spin resonance | null |
1969-01-01 | The degenerate electron liquid | null | |
1968-08-01 | Anisotropic hydrodynamic equations for differentially rotating collisionless stellar systems are derived. These equations can describe the evolution of the systems in a time span longer than their rotation periods. As a by-product of derivation of hydrodynamic equations, the well-known relation that the ratio of the pr... | Hydrodynamic equations of differentially rotating stellar systems and the velocity ellipsoid | null |
1968-01-01 | In this chapter we shall use the main results of Chapters V through VII to study the dynamical and kinematical properties of quantum mechanical systems. This will lead to the Schrödinger equation, the well known formulas for the position, momentum, and spin observables, and to the standard expressions for the Hamiltoni... | Kinematics and Dynamics | null |
1968-01-01 | In the study of lattice dynamics, it is well known that associated with free surfaces there exist normal modes characterized by a displacement field that varies in a wave like manner in the directions parallel to the surface, and which decay to zero exponentially fast as one moves toward the interior of the crystal. ^(... | Surface Spin Waves | null |
1968-01-01 | The localized modes associated with crystal impurities have been studied by many investigators.^1 Localized excitons play an important role in the fluorescence of optically active materials, and localized phonons are a useful probe for studying lattice dynamics. We shall treat the localized modes associated with impuri... | Coupling between Impurity Spins in a Magnetic Host | null |
1968-01-01 | Per scattering di Compton su particelle stabili di spin S esiste, a prescindere dalle regole di somma di Thomson e quella di ( g −2), un insieme di (2 S −1) (per S ≥1) regole di somma per sezione d'urto totale; regole di somma che, in forma non sottrata, sono relazioni di superconvergenza. Applicata a nuclei, la possib... | Compton scattering on stable targets of arbitrary spin | null |
1967-11-01 | Intelligence—Why It Grows, Why it declines | null | |
1967-09-01 | Рассматриваются ограничения, наложенные симметриями отражения пространства-времени на максимальное число вещественных параметров, определяющих как когерентное, так и некогерентное смешивание одночастичных спиновых состояний с положительной массой. Широко используется разложение оператора спиновой плотности в системе по... | Spin polarization. Part. I—Rest frame polarization states | null |
1967-09-01 | 1. A series of preliminary experiments are conducted to determine the most convenient quantity of food mantids must receive in order to ensure a long life span and a high level of striking. 2. In other series of experiments the dynamic components of the strike are analysed. Preparatory movements tend to place the anima... | Hit distance and the predatory strike of the praying mantis | null |
1967-07-01 | A quark approach to parity-violating nonleptonic decays | null | |
1967-04-01 | Covariant operators for the spin of a Fermi particle are considered. The choice of spin integrals of motion is determined for motion in steady isotropie electromagnetic fields. The spin integrals in the presence of an anomalous magnetic moment are examined. | Covariant description of the spin states of a fermi particle moving in external fields | null |
1967-02-01 | Обсуждается группа P×SL (6, C) и ее физическая интерпретация. Резюмируются предсказания, которые могут быть получены из модели. В заключении подчеркивается, что теории с бесконечными мультиплетами типа изучаемого в данной работе, встречают большие тоудности в связи с нарушением кроссингсимметрии. The group P×SL(6, C) a... | RelativisticSu(6) symmetries with infinite multiplets | null |
1967-01-01 | An important organ for investigative studies of the laser is the easily accessible skin. This organ provides opportunities not only for direct investigative studies on the effect of the laser on living tissue, but provides also living tissue for research on treatment. It is for these reasons that dermatologists have be... | Laser Effects on the Skin | null |
1967-01-01 | Because the levels of K^40 are not populated by beta decay, it is necessary to use a nuclear reaction to produce the 29.4 keV ground state transition in K^40. By passing a beam of thermal neutrons through the cryostat containing source and absorber, we have been able to utilize the K^39 (n, γ) K^40 reaction for the Mös... | Mössbauer Spectroscopy of the 29.4 keV Gamma Ray of K^40 from the Reaction K^39 (n, γ) K^40
| null |
1966-10-01 | The calculation of the radiation term in the case of single poles is carried out in the framework of a Lorentz-invariant theory including gravitational and inertial masses. A comparison with electrodynamics shows the relationship between the roles of the charge and of the gravitational mass in the renormalization formu... | Gravitational radiation and renormalization of mass in general relativity and in a Lorentz-invariant theory | null |
1966-06-01 | Annihilation of antiprotons at rest in the Lawrence Radiation Laboratory’s 15-inch deuterium-filled bubble chamber has been studied. Particular emphasis was on investigation of the characteristics of the antiproton-neutron annihilations. With a total of 2071 observed events, the ratio of the number of annihilations on ... | Antiproton annihilation at rest in deuterium | null |
1966-04-01 | All following considerations are independent of dynamics. Four simple theorems are proven concerning experiments which can determine intrinsic parities of particles or experiments which can test the validity of invariance under space reflection, time reversal, and (assuming the CPT theorem) charge conjugation. The last... | Nondynamical methods to determine parities and to test invariance principles | null |
1966-03-01 | On the basis of the results of [1], a study is made of the variation of the water level behind a horizontal hydrofoil, and an approximate method is proposed for computing the fall (or rise) of the water level at high speeds. | Deformation of the water surface behind a hydrofoil of finite span | null |
1966-03-01 | The scattering of spin-oriented electrons, moving in a constant homogeneous magnetic field, by a short-range potential is analyzed. The change in the electron spin orientation is calculated using the Born approximation. | Electron scattering by a short-range potential in a constant homogeneous magnetic field | null |
1965-09-01 | P. B. M. Walker (1954) and H. C. Longuet-Higgins (quoted by Walker), as well as O. Scherbaum and G. Rasch (1957), made the first attempts towards a mathematical study of the age distribution in a cellular population. It was H. Von Foerster (1959), however, who derived the complete differential equation for the age dens... | Mathematical models for cellular systems the von Foerster equation. Part I | null |
1965-04-01 | This paper deals with a theoretical investigation of the energy spectrum of thermal neutrons inelastically scattered by a ferromagnetic crystal. The method of double-time temperature-dependent Green’s functions is used. Formulæ are derived for the line width and for an asymmetry parameter leading to a deviation from th... | Magnetic inelastic scattering of neutrons by a ferromagnetic crystal | null |
1965-01-01 | In earlier nuclear magnetic resonance (NMR) measurements on mercury^1 and tin,^2 it was found that the Knight shift in the superconducting (SC) state does not vanish as T → 0. If one assumes that the Knight shift is caused merely by the hyperfine (hf) contact interaction, and thus is proportional to the electron spin s... | Effect of Spin-Orbit Coupling on the Hyperfine Contact Contribution to the Knight Shift | null |
1965-01-01 | This paper reviews the plasma and magnetic field data ( Bonetti et al. , 1963 ; Heppner et al. , 1963) obtained in March 1961 from the space probe Explorer X. Particularly emphasized is the strong correlation of these separate results when viewed with respect to multiple crossings of the geomagnetic cavity boundary on ... | Observations of the Geomagnetic Cavity Boundaries | null |
1965-01-01 | “In the beginning, things were without form and void.” This semi-Biblical quote is not really pertinent to the Mössbauer effect. After a brief period of surprise (“You mean that, despite thermal vibrations of approximately 10^5 cm/sec, you expect me to believe gamma-ray absorption can be changed by applying 10^−2 mm/se... | Review of Advances in Physics | null |
1965-01-01 | Rigorous symmetries of elementary particles | null | |
1964-10-01 | Society reports and conferences | null | |
1961-06-01 | It is proposed that the columnar epithelial tissue covering the inner surface of the small intestine is in a state of dynamic equilibrium. The total mass of the epithelial cells remains constant while the individual cells are continually lost and replaced. The size of the mass is estimated to be about 750 ml. If the li... | A concept of the pathogenesis of anemia applied to disorders of the intestinal mucosa | null |
1961-01-01 | Complete attitude control of a rocket during both powered flight and coasting can be achieved with an auxiliary control-jet along a single body axis, providing the rocket is spun about its longitudinal axis at a modest rate. Then by timing the control-jet impulse to occur during the proper portion of each spin revoluti... | Attitude Control of Rockets Using a Single Axis Control Jet | null |
1959-01-01 | Теория Гейзенбсрга, м одифицированная ван Флеком для всществ с произволъным спино м на атом, обобщсна на с лучай ферримагнетик ов, антиферромагнетико в и тонких слоев с прои зволъным числом подр сшеток и с произволъным спин ом на атом. Обменная ча стъ знергии оператора формулиру стся при помощи „вращ ающихся“ спиновых ... | The quantum theory of the spontaneous magnetization of ferrimagnetics, anti-ferromagnetics and thin films with arbitrary spin at high temperatures | null |
1958-12-01 | Определяются векторы состояния, характеризующие реальные нуклоны, методом средней связи, используя методы конфигурационного пространства в квантовой теории полей. Расматривается взаимодействие между нуклонным полем, описиваемым уравнением Дирака, и скалярным или псевдоскалярным мезонним полем. Образование пар пренебрег... | Tomonaga’s intermediate coupling theory using configuration space methods | null |
1958-03-01 | The dynamics of cell multiplication and differentiation in tissues in a steady state and the kinetics of isotope incorporation into the DNA have been theoretically analyzed. Equations have been derived, with the aid of which the generation time , the life span , and the distribution or rate of death of the cells can be... | Kinetics of isotope incorporation into the desoxyribonucleic acid (DNA) of tissues: Life span and generation time of cells | null |
1958-03-01 | The role of special relativity, based on the restricted Lorentz group L_4 consisting of rotations in space-time, in the earlier development of quantum theory, in the connection between spin and statistics established by Pauli, and in Dirac’s theory of the electron is briefly indicated. The theory of undors is pointed o... | Physical applications of the Lorentz group | null |
1957-05-01 | Ontogenetic dynamics of lipfuscin in the human heart muscle were studied by the method of planimetric measurements. The hearts of one hundred cadavers of the age from 28 weeks up to 82 years were investigated. Beginning with the second decade of life lipofuscin is present on the myocardium of every individual, no matte... | Age changes in the lipofuscin content of the human heart muscle | null |
2024-01-10 | Context The study investigates the impact of Hubbard U correction and spin-orbit coupling (SOC) on the structural, mechanical, electronic, and optical properties of Ti $$_2$$ 2 O $$_3$$ 3 and SrTiO $$_3$$ 3 compounds. The research is motivated by the potential applications of these materials in photovoltaics, with a fo... | First principle study of ATiO
$$_3$$
3
(A=Ti,Sr) materials for photovoltaic applications | null |
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