核质量测量图绘制原子核的结构和增强中子星的结构

论文标题

核质量测量图绘制原子核的结构和增强中子星的结构

Nuclear Mass Measurements Map the Structure of Atomic Nuclei and Accreting Neutron Stars

论文作者

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

论文摘要

我们提出了通过tof-$bρ$质谱法获得的，在国家超导型回旋体实验室中获得了AR的中子同位素的质量过剩（ME）。相对于先前的分析，我们的新结果大大降低了系统的不确定性，以$^{58,59} {\ rm ti} $，$^{62} {\ rm v} $，$^{\ rm v} $，$^{65} $，$^{65} {65} {\ rm cr} { $^{69,70} {\ rm fe} $。我们的结果表明，$ n = 34 $ subshell在SC上的弱点削弱，在Ti处消失，而在MN上没有$ n = 40 $ subshell。这导致了较冷的中子恒星外壳，突出了核与中子星的结构之间的联系。

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

下载PDF全文

下载文献需遵守相关版权规定

论文标题