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

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

2009-07-06

arxiv.org/abs/0907.1055v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 4 figures; submitted to Phys. Rev. Lett

Scientific paper

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 $^{68}$Se, $^{72}$Kr, $^{76}$Sr and $^{80}$Zr 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.

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