Nuclear mass measurements map the structure of atomic nuclei and accreting neutron stars

Z. Meisel, S. George, S. Ahn, D. Bazin, B. A. Brown, J. Browne, J. F. Carpino, H. Chung, R. H. Cyburt, A. Estradé, M. Famiano, A. Gade, C. Langer, M. Matoš, W. Mittig, F. Montes, D. J. Morrissey, J. Pereira, H. Schatz, J. SchatzM. Scott, D. Shapira, K. Smith, J. Stevens, W. Tan, O. Tarasov, S. Towers, K. Wimmer, J. R. Winkelbauer, J. Yurkon, R. G.T. Zegers

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15 Scopus citations

Abstract

We present mass excesses (ME) of neutron-rich isotopes of Ar through Fe, obtained via time of flight Bρ 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 Ti58,59,V62,Cr65,Mn67,68, and Fe69,70. 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.

Original languageEnglish
Article number052801
JournalPhysical Review C
Volume101
Issue number5
DOIs
StatePublished - May 2020

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