Nuclear level densities and gamma-ray strength functions in 44,45Sc

Details Nuclear level densities and gamma-ray strength functions in 44,45Sc Nuclear level densities and gamma-ray strength functions in 44,45Sc

2007-06-04

arxiv.org/abs/0706.0533v3

Phys.Rev.C76:044303,2007

Physics

Nuclear Physics

Nuclear Experiment

21 pages, 13 figures. Published version

Scientific paper

10.1103/PhysRevC.76.044303

The scandium isotopes 44,45Sc have been studied with the 45Sc(3He,alpha gamma)44Sc and 45Sc(3He,3He' gamma)45Sc reactions, respectively. The nuclear level densities and gamma-ray strength functions have been extracted using the Oslo method. The experimental level densities are compared to calculated level densities obtained from a microscopic model based on BCS quasiparticles within the Nilsson level scheme. This model also gives information about the parity distribution and the number of broken Cooper pairs as a function of excitation energy. The experimental gamma-ray strength functions are compared to theoretical models of the E1, M1, and E2 strength, and to data from (gamma,n) and (gamma,p) experiments. The strength functions show an enhancement at low gamma energies that cannot be explained by the present, standard models.

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