摘要:

AbstractProofs have been given that gauge transformations are needed in order to make finite the divergent space‐dispersions evaluations occurring as a result of the scalar‐field translation. So, the Higgs‐mechanism works only if there is a finite maximum value of the emerging space‐dispersion evaluation of the scalar field. The space dispersion thus used is expressed by the imaginary part of the average‐value of the non‐hermitian spa

ISSN:0003-3804    

DOI:10.1002/andp.19804920302

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractThe localized approximation for a quantum crystal considered earlier by the author is taken here as the initial step of an iteration, and the higher approximations for the propagators and thermodynamic functions are calculated. This generalization is based on a new type of a double iterative procedure for the equation of motion. The method is illustrated with a three‐dimensional crysta

ISSN:0003-3804    

DOI:10.1002/andp.19804920303

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractThis paper presents an extensive study of the nature of the pseudorapidity distribution in hadron‐nucleus collision in emulsion from accelerator energy to super high cosmic ray energies (24 GeV/c to 4 TeV). The energy and the target dependence of the distributions and their possible significance are also discusse

ISSN:0003-3804    

DOI:10.1002/andp.19804920304

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractNoting that a classical phase‐space probability distributionw(q, p) may be calculated from moment expectation values {qmpn}, we inquire as to whether similar data in quantum mechanics would be adequate to determine the statistical operator ϱ. For the family of simultaneous (q, p) measurement schemes investigated, it turns out that such moments do not suffice to fix ϱ. Comparison of the empirical information that is adequate to determine ϱ with that required to findw(q, p) reveals that in a sense more data are needed for state determination in quantum statistics than are needed in the classical

ISSN:0003-3804    

DOI:10.1002/andp.19804920305

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractDie zeitlich fouriertransformierte Greensche Tensorfunktion optisch anisotroper Medien wird in der Fernfeldnäherung berechnet. Dabei wird die räumlich und zeitlich fouriertransformierte Tensorfunktion nach den Eigenvektoren der homogenen Fresnelgleichung entwickelt und die räumliche Rücktransformation in der asymptotischen Näherung mit der Integrationsmethode der stationären Phase ausgeführt. Als Anwendungsbeispiel wird das Strahlungsfeld eines elektrischen Dipols in einem optisch anisotropen Medium behandelt. Alle Ergebnisse werden für den Fall optisch einachsiger Kristalle dis

ISSN:0003-3804    

DOI:10.1002/andp.19804920306

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractBy modifying the simple Morse oscillator model usually used for describing the vibrational motion of a linear XH…Y complex a more realistic model is proposed, which is in better agreement with experimental results. The potential energy surface is derived by fitting the bond length, the dissociation energy of the H‐bond, the bond length shortening, and the normal frequency of thev(XH) vibration to their observed values. From the resulting values of the transition matrix elements between low excitedv(XH) and high excitedv(XH…Y) quantum states it is shown, that for explaining the smoothness of the IR absorption bands the intramolecular coupling betweenv(XH) andv(XH…Y) stretching modes of vibration should be taken into

ISSN:0003-3804    

DOI:10.1002/andp.19804920307

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractBy applying the models developed by Bixon and Jortner and by Konoplev and Plotnikov, respectively, for describing the energy relaxation of excited electronic levels and by using the results of the authors recently found from the study of the IR absorption spectra of H‐bonded species XH…Y the depopulation of excited vibrational levels of smal (two‐atomic) molecules in a dense medium (solid matrix) is studied. It is found that by formation of H‐bonds the depopulation times may be shortened essentially (more than five orders of mag

ISSN:0003-3804    

DOI:10.1002/andp.19804920308

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractAdjusting conditions of pulse sequences for high‐resolution nmr in solids are demonstrated by the example of the WHH4 cycle. For this pulse sequence the well‐known adjusting condition [1] occurs as limiting case at sufficiently weak dipolar interaction. The relations between the pulse rotation angle and interval time proved to be dependent on the dipolar interaction. Therefore it is impossible to suppress the dipolar interaction in ordinary solids completely.If the strength of the dipolar interaction varies in a range depending on the allowable inhomogeneity of the rf field a spectrometer for high‐resolution nmr in solids can be adjusted in an almost optima

ISSN:0003-3804    

DOI:10.1002/andp.19804920309

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0003-3804    

DOI:10.1002/andp.19804920310

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0003-3804    

DOI:10.1002/andp.19804920301

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY