Lorentz-Lorenz Quenching for the Gamow-Teller Sum Rules

1984 ◽  
pp. 201-204
Author(s):  
J. Delorme ◽  
M. Ericson ◽  
A. Figureau ◽  
N. Giraud
Keyword(s):  
Sum Rules ◽  
Gamow Teller

scholarly journals Single and Double Charge Exchange Excitations of Spin-Isospin Mode

2019 ◽  
Vol 223 ◽  
pp. 01053
Author(s):  
Hiroyuki Sagawa
Keyword(s):  
Cross Section ◽  
Charge Exchange ◽  
Sum Rules ◽  
Transition Strength ◽  
Double Charge Exchange ◽  
Double Spin ◽  
Isobaric Analog ◽  
Isobaric Analog State ◽  
Double Charge ◽  
Gamow Teller

We study the sum rules of double Gamow-Teller (DGT) excitations through double spin-isospin operator (σt­)2 In general, 2+states in the granddaughter nuclei have dominant transition strength in DGT excitations and 0+states are weak, except in T = 1 mother nuclei in which 0+strength is competitive with 2+strength. A possibility to extract the unit cross section for the DGT transition strength is pointed out in the (#x03C3;t­)2 excitation of double isobaric analog state (DIAS) in T = 1 nuclei.

Total Gamow-Teller strength, ground-state correlations and sum rules in QRPA with neutron-proton pairing

1995 ◽  
Vol 587 (2) ◽  
pp. 301-317 ◽  
Author(s):  
M.K. Cheoun ◽  
Amand Faessler ◽  
F. Šimkovic ◽  
G. Teneva ◽  
A. Bobyk
Keyword(s):  
Ground State ◽  
Sum Rules ◽  
Proton Pairing ◽  
Gamow Teller

ROLES OF ANTI-NUCLEON DEGREES OF FREEDOM IN RELATIVISTIC NUCLEAR MODELS

2006 ◽  
Vol 15 (08) ◽  
pp. 1925-1931
Author(s):  
HARUKI KURASAWA ◽  
TOSHIO SUZUKI
Keyword(s):  
Response Function ◽  
Degrees Of Freedom ◽  
Sum Rules ◽  
Sum Rule ◽  
Nuclear Models ◽  
Relativistic Models ◽  
Gamow Teller

The roles of anti-nucleon degrees of freedom in nuclear relativistic models are discussed. They are necessary for sum rules. It is also pointed out that the no-sea approximation, where the divergent terms due to the anti-nucleon degrees of freedom are neglected, has no physical justification and is a serious problem. These facts are shown in an analytic way by using the sum rule and RPA response function for the giant Gamow-Teller states.

Gamow-Teller sum rules and ground-state correlations

1986 ◽  
Vol 182 (3-4) ◽  
pp. 265-268 ◽  
Author(s):  
M.H. Macfarlane
Keyword(s):  
Ground State ◽  
Sum Rules ◽  
Gamow Teller

Sum rules for double Gamow - Teller excitation

1992 ◽  
Vol 277 (1-2) ◽  
pp. 13-17 ◽  
Author(s):  
Kazuo Muto
Keyword(s):  
Sum Rules ◽  
Gamow Teller

Sum rules for isovector excitations

1987 ◽  
Vol 65 (6) ◽  
pp. 626-632 ◽  
Author(s):  
M. H. Macfarlane
Keyword(s):  
Ground State ◽  
Sum Rules ◽  
Random Phase ◽  
Current Status ◽  
Heavy Nuclei ◽  
Strength Functions ◽  
Energy Moments ◽  
Further Development ◽  
Gamow Teller ◽  
Total P

This paper deals with the sum rules obtained from the energy moments of multipole-excitation strength functions. An explicit expression in terms of ground-state orbit-occupation probabilities is given for the total, non-energy-weighted strength of isovector excitations. For the Gamow–Teller (GT) excitation, separate sum rules are obtained for the total (p, n) and (n, p) strengths; these sum rules satisfy the Ikeda relation (S(p, n)–S(n, p) = 3(N – Z)) exactly. The GT sum rules are then used to estimate the influence of ground-state correlations on total (p, n) and (n, p) strengths in 208Pb. Sizeable strength enhancements are obtained, ranging from around 15% (in units of 3(N – Z) for longer range random-phase approximation correlations to 50% or more if short-range nuclear-matter correlations are included. An assessment is then given of the current status of the problem of missing Gamow–Teller strength in heavy nuclei. Brief concluding sections deal with the isospin splitting of isovector excitations and further development of the energy–moment sum rules.

scholarly journals Gamow-Teller sum rules and the /sup 14/C(/sup 6/Li,/sup 6/He)/sup 14/N reaction. [62 MeV]

1977 ◽  
Author(s):  
W R Wharton ◽  
C D Goodman ◽  
D C Hensley
Keyword(s):  
Sum Rules ◽  
Gamow Teller

Gamow-Teller sum rules and theC14(Li6,He6)N14reaction

1980 ◽  
Vol 22 (3) ◽  
pp. 1138-1144 ◽  
Author(s):  
W. R. Wharton ◽  
C. D. Goodman ◽  
D. C. Hensley
Keyword(s):  
Sum Rules ◽  
Gamow Teller

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

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