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, 34 (3), p. 319. [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 |
| Journal 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 |
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