摘要:

AbstractThe Semiphenomenological Model of the Nucleus (SPM) is applied to describing the mechanisms of the inelastic and elastic scattering of nucleons by nuclei. Perturbation theory for the SPM “residual” interaction (including the first and second order) is used as calculational method. Cross sections, angular distributions, widths of resonant states and the imaginary part of optical potential are considered in a unified manner (one‐step and two‐step transitions being taken into account). Numerical estimates are given for the target nucleus41Ca, quasiparticle states being taken as intermedia

ISSN:0003-3804    

DOI:10.1002/andp.19744860302

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractThe Semiphenomenological Model of the Nucleus (SPM) is applied to description of inelastic nucleon scattering with excitation of rotational states. Cross sections of inelastic scattering of protons withE= 6 Mev by56Fe with excitation of the states |IπK>= |2+0>and |IπK>= |2+2>are calculated for illustration. The total deformation and non‐axiality parameters are derived and compared with predictions of SPM, the agreement being satisfact

ISSN:0003-3804    

DOI:10.1002/andp.19744860303

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractOptical‐model potentials are constructed for nucleon‐nucleus scattering. The contribution of collective states to the imaginary part of the optical potential is investigated; the interaction between the incident nucleon and an even‐even deformed target nucleus is considered in the weak coupling scheme of the Semiphenomenological Model of the Nucleus. The potentials constructed are in good agreement with the phenomenological ones. Numerical estimates are given for the target nucleus156Gd at the incident energy 1

ISSN:0003-3804    

DOI:10.1002/andp.19744860304

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractDie kantenferne Feinstruktur des Röntgenabsorptionsspektrums eines Atoms in einem chemischen Verband ist abhängig von dessen Orientierung zu einem polarisierten und unpolarisierten Röntgenstrahl. Für diese Abhängigkeiten werden allgemeine Gleichungen ohne Berücksichtigung der Spin‐Bahn‐Wechselwirkungen angegeben. Die Gültigkeit der KOSLENKOWschen Gleichung für polykristalline Festkörper, Flüssigkeiten und Gase wird allgemein bewiesen. Für dieK‐Absorption werden die von ISRAILEWAhergeleiteten Gleichungen erhalten. Außerdem werden die expliziten Gleichungen für dieLII‐ undLIII

ISSN:0003-3804    

DOI:10.1002/andp.19744860305

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractThe gain of the stimulated resonance RAMANscattering (SRRS) and stimulated fluorescence is obtained by means of an analytical solution of the density matrix equation and MAXWELL's equations for laser‐ und STOKES‐radiation. The transient effects, which are caused by the population change of the molecule levels, and the influence of the resonance absorption on the pumping and the STOKESradiation are studied.The strong laser absorption yields a maximal gain, which shows, why the stimulated resonance RAMANscattering could not be observed in many substances. As a result of our paper we give a possible interpretation of the experimentally observed relation between the stimulated fluorescence and the resonant RAMANscatter

ISSN:0003-3804    

DOI:10.1002/andp.19744860306

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractA theoretical treatment of pulsed nitrogen laser operation is presented. The properties of laser pulses were investigated as functions of various parameters (electric circuit parameters, laser length, gas pressure). Based on this model some conditions are obtained which are necessary for effective laser pulse emission, and the known nitrogen laser devices are discussed.

ISSN:0003-3804    

DOI:10.1002/andp.19744860307

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractGeneral equations, describing the nuclear spin relaxation behaviour in heterogeneous systems, consisting of regions with different relaxation times and diffusion coefficients, are presented. For a special two region system, by means of analogue computing technique the influence of both diffusivity and height of the barriers between the regions on total relaxation is studied. It is shown, that using appropriate expressions for the mean lifetimes of the nuclei in the regions, the relaxation function of total magnetisation may be approximated by the formulae of ZIMMERMANand BRITTIN. These relations may be used for a rough estimation of diffusivity in the systems under consideration.

ISSN:0003-3804    

DOI:10.1002/andp.19744860308

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractEs wird angenommen, daß sich im inelastischen Stoß zweier hochenergetischer Elementarteilchen Feuerbälle bilden, deren Zerfall die erzeugten Teilchen ergibt. Die Feuerballverteilung entsteht durch den Zerfall des angeregten Hydronensystems in einen leading Feuerball und ein Restsystem. Es wird verlangt, daß der Zerfall einer Bootstrapbedingung genügt, derzufolge die Feuerballverteilung vom Restsystem in seinem Ruhsystem die gleiche Form hat wie die Feuerballverteilung vom gesamten Stoß im Schwerpunktsystem. Die Bootstrapbedingung führt auf eine Integralgleichung. Näherungslösungen der Integralgleichung werden in der Scalinggrenze di

ISSN:0003-3804    

DOI:10.1002/andp.19744860309

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

ISSN:0003-3804    

DOI:10.1002/andp.19744860301

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY