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arXiv · 2004.14101

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. Schatz·M. 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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Abstract

We present mass excesses (ME) of neutron-rich isotopes of Ar through Fe, obtained via TOF-$B\rho$ 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 $^{58,59}{\rm Ti}$, $^{62}{\rm V}$, $^{65}{\rm Cr}$, $^{67,68}{\rm Mn}$, and $^{69,70}{\rm Fe}$. 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.

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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. Schatz, M. Scott, D. Shapira, K. Smith, J. Stevens, W. Tan, O. Tarasov, S. Towers, K. Wimmer, J. R. Winkelbauer, J. Yurkon, R. G. T. Zegers. 2020-04-29. Nuclear Mass Measurements Map the Structure of Atomic Nuclei and Accreting Neutron Stars. https://doi.org/10.1103/physrevc.101.052801

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