TU Darmstadt / ULB / TUbiblio

Breaking of the SU(4) limit for the Gamow-Teller strength in N ∼ Z nuclei

Petermann, I. and Martínez-Pinedo, G. and Langanke, K. and Caurier, E. (2007):
Breaking of the SU(4) limit for the Gamow-Teller strength in N ∼ Z nuclei.
In: Eur. Phys. J. A, p. 319, 34, (3), [Online-Edition: http://dx.doi.org/10.1140/epja/i2007-10502-7],
[Article]

Abstract

We have performed large-scale shell model calculations of the Gamow-Teller strength distributions in N ? Z pf -shell nuclei. These calculations were motivated by the experimental attempts to measure the low-lying GT strength for the even-even N = Z + 2 or N = Z - 2 nuclei 46Ti , 50Cr , 54Fe and 62Ge , where a sizable low-energy GT strength could be interpreted as reminiscence of SU(4) symmetry; in the limit of exact SU(4) symmetry the GT- strength would be concentrated in a single transition to the lowest T = 0, J = 1+ state in the daughter. We confirm that the SU(4) symmetry is strongly broken by the spin-orbit interaction and by increasing neutron excess.

Item Type: Article
Erschienen: 2007
Creators: Petermann, I. and Martínez-Pinedo, G. and Langanke, K. and Caurier, E.
Title: Breaking of the SU(4) limit for the Gamow-Teller strength in N ∼ Z nuclei
Language: English
Abstract:

We have performed large-scale shell model calculations of the Gamow-Teller strength distributions in N ? Z pf -shell nuclei. These calculations were motivated by the experimental attempts to measure the low-lying GT strength for the even-even N = Z + 2 or N = Z - 2 nuclei 46Ti , 50Cr , 54Fe and 62Ge , where a sizable low-energy GT strength could be interpreted as reminiscence of SU(4) symmetry; in the limit of exact SU(4) symmetry the GT- strength would be concentrated in a single transition to the lowest T = 0, J = 1+ state in the daughter. We confirm that the SU(4) symmetry is strongly broken by the spin-orbit interaction and by increasing neutron excess.

Journal or Publication Title: Eur. Phys. J. A
Volume: 34
Number: 3
Divisions: 05 Department of Physics
05 Department of Physics > Institute for condensed matter physics
Date Deposited: 20 Jan 2009 12:12
Official URL: http://dx.doi.org/10.1140/epja/i2007-10502-7
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item