Nuclear mass measurements map the structure of atomic nuclei and accreting neutron stars
Abstract
We present mass excesses (ME) of neutron-rich isotopes of Ar through Fe, obtained via time of flight B ρ mass spectrometry at the National Superconducting Cyclotron Laboratory. Our new results have significantly reduced systematic uncertainties relative to a prior analysis, enabling the first determination of ME for Ti,5958,62V,65Cr,Mn,6867, and Fe,7069. Our results show the N =34 subshell weaken at Sc and vanish at Ti, along with the absence of an N =40 subshell at Mn. This leads to a cooler accreted neutron star crust, highlighting the connection between the structure of nuclei and neutron stars.
- Publication:
-
Physical Review C
- Pub Date:
- May 2020
- DOI:
- 10.1103/PhysRevC.101.052801
- arXiv:
- arXiv:2004.14101
- Bibcode:
- 2020PhRvC.101e2801M
- Keywords:
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- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- Accepted for publication as a Rapid Communication in Physical Review C