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**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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