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

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

Offizielle URL: http://dx.doi.org/10.1140/epja/i2007-10502-7

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2007
Autor(en): Petermann, I. ; Martínez-Pinedo, G. ; Langanke, K. ; Caurier, E.
Titel: Breaking of the SU(4) limit for the Gamow-Teller strength in N ∼ Z nuclei
Sprache: Englisch
Kurzbeschreibung (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.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Eur. Phys. J. A
Band: 34
(Heft-)Nummer: 3
Fachbereich(e)/-gebiet(e): Fachbereich Physik > Festkörperphysik, Condensed matter physics
Fachbereich Physik
Hinterlegungsdatum: 20 Jan 2009 12:12
Offizielle URL: http://dx.doi.org/10.1140/epja/i2007-10502-7
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