Single-Particle and Collective Motion for Proton-Rich Nuclei on the Astrophysical rp-Process Path

Abstract

Based on available experimental data, a new set of Nilsson parameters is proposed for proton-rich nuclei with proton or neutron numbers $28\le N\le 40$. The resulting single-particle spectra are compared with those from relativistic and non-relativistic mean field theories. Collective excitations in some even--even proton-rich nuclei in the upper $pf$ shell are investigated using the Projected Shell Model with the new Nilsson basis. It is found that the regular bands are sharply disturbed by band crossings involving $1g_{9/2}$ neutrons and protons. Physical quantities for exploring the nature of the band disturbance and the role of the $1g_{9/2}$ single-particle are predicted, which may be tested by new experiments with radioactive beams.

4 pages, 3 figures, accepted by Phys. Rev. C, Rapid Communication

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• Rotation alignment in neutron-rich Cr isotopes: A probe of deformed single-particle levels across N=40
• Multi-Shell Shell Model for Heavy Nuclei
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• High-K isomer and the rotational properties in the odd-Z neutron-rich nucleus ${}^{163}$Eu
• Signature splitting inversion and backbending in 80Rb