Evidence of double magicity of N=Z nuclei near the rp-process path

2009/07/06 by Sharma, M. M., Sharma, J. K.
#FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.0907.1055

Abstract

N=Z nuclei above Ni are understood to be waiting-point nuclei in the rp-process nucleosynthesis. Investigating the experimental isotope shifts in Kr isotopes near the proton drip-line, we have discovered that N=Z rp-process nuclei ⁶⁸Se, ⁷²Kr, ⁷⁶Sr and ⁸⁰Zr exhibit a significant shell gap both at the proton and neutron numbers in the deformed space with the consequence that pairing correlations for protons and neutrons vanish, thus lending a double-magic character to these nuclei. A significant number of nuclei in this region are also shown to exhibit neutron magicity at N = 34, 36, 38, and 40 in the deformed space.

Related

• Structural properties of nuclei with semi-magic number N(Z)=40
• Nuclei near and at the proton dripline
• New Magic Numbers and New Islands of Stability in Drip-Line Regions
• Competition of the shell closure and deformations across the doubly magic ⁷⁸Ni
• The role of near neutron drip-line nuclei in the r-process