Masses of neutron-rich 52-54SC and Ti-54,Ti-56 nuclides: The N=32 subshell closure in scandium

Xu X.; Wang M.; Blaum K.; Holt J. D.; Litvinov Yu A.; Schwenk A.; Simonis J.; Stroberg S. R.; Zhang Y. H.; Xu H. S.; Shuai P.; Tu X. L.; Zhou X. H.; Xu F. R.; Audi G.; Chen R. J.; Chen X. C.; Fu C. Y.; Ge Z.; Huang W. J.; Litvinov S.; Liu D. W.; Lam Y. H.; Ma X. W.; Mao R. S.; Ozawa A.; Sun B. H.; Sun Y.; Uesaka T.; Xiao G. Q.; Xing Y. M.; Yamaguchi T.; Yamaguchi Y.; Yan X. L.; Zeng Q.; Zhao H. W.; Zhao T. C.; Zhang W.; Zhan W. L.

首页> 外文期刊>Physical review, C >Masses of neutron-rich 52-54SC and Ti-54,Ti-56 nuclides: The N=32 subshell closure in scandium

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Masses of neutron-rich 52-54SC and Ti-54,Ti-56 nuclides: The N=32 subshell closure in scandium

机译：富含中子的52-54SC和TI-54，TI-56核素：N = 32个子壳封闭钪

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Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the neutron-rich Sc52-54 and Ti-54,Ti-56 nuclei. The new mass excess values ME (Sc-52) = - 40525(65) keV, ME(Sc-53) = -38910(80) keV, and ME(Sc-54) = -34485(360) keV, deviate from the Atomic Mass Evaluation 2012 by 2.3 sigma, 2.8 sigma, and 1.7 sigma, respectively. These large deviations significantly change the systematics of the two-neutron separation energies of scandium isotopes. The empirical shell gap extracted from our new experimental results shows a significant subshell closure at N = 32 in scandium, with a similar magnitude as in calcium. Moreover, we present ab initio calculations using the valence-space in-medium similarity renormalization group based on two- and three-nucleon interactions from chiral effective field theory. The theoretical results confirm the existence of a substantial N = 32 shell gap in Sc and Ca with a decreasing trend towards lighter isotones, thus providing a consistent picture of the evolution of the N = 32 magic number from the pf into the sd shell.

机译：等时质谱已经施加在储存环CSRE中，以测量中子富型SC52-54和Ti-56核的质量。新的质量超值ME（SC-52）= - 40525（65）KEV，ME（SC-53）= -38910（80）KeV，以及ME（SC-54）= -34485（360）Kev，偏离2012年原子质量评估分别为2.3厘米，2.8厘米，1.7厘米。这些大偏差显着改变了钪同位素的两节中子分离能量的系统。从我们的新实验结果中提取的经验壳间隙显示出在钪中N = 32的显着子壳闭合，其钙在钙中具有相似的大小。此外，我们使用基于手性有效场理论的两核相互作用，使用价值空间中介质相似性重整组的AB初始计算。理论结果证实了在SC和Ca中的实质性n = 32壳间隙的存在，其朝向较轻的同种液的趋势降低，从而从PF到SD壳中的N = 32个魔号的演变的一致性图像提供了一致的图像。

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《Physical review, C》 |2019年第6期|共6页
作者
Xu X.; Wang M.; Blaum K.; Holt J. D.; Litvinov Yu A.; Schwenk A.; Simonis J.; Stroberg S. R.; Zhang Y. H.; Xu H. S.; Shuai P.; Tu X. L.; Zhou X. H.; Xu F. R.; Audi G.; Chen R. J.; Chen X. C.; Fu C. Y.; Ge Z.; Huang W. J.; Litvinov S.; Liu D. W.; Lam Y. H.; Ma X. W.; Mao R. S.; Ozawa A.; Sun B. H.; Sun Y.; Uesaka T.; Xiao G. Q.; Xing Y. M.; Yamaguchi T.; Yamaguchi Y.; Yan X. L.; Zeng Q.; Zhao H. W.; Zhao T. C.; Zhang W.; Zhan W. L.;
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Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Max Planck Inst Kernphys D-69117 Heidelberg Germany;

TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Max Planck Inst Kernphys D-69117 Heidelberg Germany;

Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Peking Univ Sch Phys State Key Lab Nucl Phys &

Technol Beijing 100871 Peoples R China;

Univ Paris Sud CNRS CSNSM IN2P3 F-91405 Orsay France;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Max Planck Inst Kernphys D-69117 Heidelberg Germany;

GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Univ Tsukuba Inst Phys Ibaraki 3058571 Japan;

Beihang Univ Sch Phys &

Nucl Energy Engn Beijing 100191 Peoples R China;

Shanghai Jiao Tong Univ Dept Phys &

Astron Shanghai 200240 Peoples R China;

RIKEN RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Saitama Univ Dept Phys Saitama 3388570 Japan;

RIKEN RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

Chinese Acad Sci Key Lab High Precis Nucl Spect Inst Modern Phys Lanzhou 730000 Gansu Peoples R China;

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6. Masses of neutron-rich Sc52–54 and Ti54,56 nuclides: The N=32 subshell closure in scandium [O] . X. Xu, M. Wang, K. Blaum, 2019

机译：富含中子的SC52-54和Ti54,56核素：N = 32个子壳封闭钪

Masses of neutron-rich 52-54SC and Ti-54,Ti-56 nuclides: The N=32 subshell closure in scandium

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