Zobrazeno 1 - 10 of 43 pro vyhledávání: '"D.M Fradkin"'
1
A Class of Double Integrals Involving Gaussian and Trigonometric Factors
Autor: D.M. Fradkin
Publikováno v: J Res Natl Bur Stand (1977)
The five parameter double integral [Formula: see text] times [Formula: see text] is evaluated in terms of Fourier transforms of exp(− x(2))erfc(αx). Some new expressions for these transforms are obtained.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e609fe879308855603a2226a927f5e4
https://pubmed.ncbi.nlm.nih.gov/34880522
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4
Scattering Wavefunctions for a Dirac Particle in a Central Potential
Autor: T.A Weber, C.L Hammer, D.M Fradkin
Publikováno v: Journal of Mathematical Physics. 5:1645-1651
The scattering wavefunction for a Dirac particle in a central potential is written in terms of a matrix acting on a plane-wave spinor whose momentum direction p and polarization direction are the assigned directions for the asymptotic incident plane
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2fc7e068e1c242405c4364e4aa9a5d9f
https://doi.org/10.1063/1.1931201
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5
A method of asymptotic expansion of fourier-type integrals
Autor: T.A Weber, C.L Hammer, D.M Fradkin
Publikováno v: Annals of Physics. 27:362-376
The expansion for large ν of integrals of the type G ( v ) = ∫ t 1 t 2 e ivf ( t ) g dt is discussed. The method consists of using the mapping z = f ( t ) so that the integral in question becomes G ( v ) = ∫ a b e ivz F ( z ) dz . This integral
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::300162b26664133c32b1692c9d083680
https://doi.org/10.1016/0003-4916(64)90236-2
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6
Integral expressions for the difference between contiguous Dirac phase shifts
Autor: D.M. Fradkin, F. Calogero
Publikováno v: Nuclear Physics. 75:470-474
The extensions to the Dirac case of a formula by Tietz are presented. This formula relates phase shifts differing by one unit of angular momentum to an appropriate average of the radial rate of change of the potential.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28d2764d62a10d7eea6492dcbf0962fd
https://doi.org/10.1016/0029-5582(66)90776-0
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7
Integral expressions for arbitrary phase shift differences
Autor: D.M. Fradkin, F. Calogero
Publikováno v: Nuclear Physics. 75:475-480
General methods are presented to obtain integral expressions for the difference between phase shifts. In particular, formulae which relate scattering phase shifts with different angular momenta are presented for both the Schrodinger and Dirac cases.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe3b1d2dfbafe1d14d125f613d99e226
https://doi.org/10.1016/0029-5582(66)90777-2
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8
Coulomb scattering of dirac particles
Autor: T.A Weber, C.L Hammer, D.M Fradkin
Publikováno v: Annals of Physics. 27:338-361
The continuum Coulomb wave function in the Johnson and Deck form—a matrix operator acting on a plane wave spinor—is discussed. General relations for the elastic differential cross section, the asymmetry parameters, and the precession and nutation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83f856cea5d4d95844b87d48c2e7779f
https://doi.org/10.1016/0003-4916(64)90235-0
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