Masses of neutron-rich 
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 nucl

Xu, X.; Wang, M.; Blaum, Klaus; Holt, J. D.; Litvinov, Yu. A.; Schwenk, A.; Simonis, J.; Stroberg, S. R.; Zhang, Y. H.; Xu, Hu; Peng, Shuai; Tu, X. L.; Zhou, X. H.; Fang, Xu; Audi, G.; Chen, R. J.; Chen, X. C.; Fu, Chuancheng; Ge, Zhiqiang; Huang, W. J.; Litvinov, S.; Liu, D. W.; Lam, Y. H.; W., X.; Mao, Ruishi; Ozawa, A.; Sun, B. H.; Sun, Y.; Uesaka, T.; Xiao, Guoqing; Xing, Y. M.; Yamaguchi, Takayuki; Yamaguchi, Yoshitaka; Yan, X. L.; Zeng, Q.; Zhao, Hongwei; Zhao, T.C.; Zhang, W.; Zhan, W.

doi:10.1103/physrevc.99.064303

Cited by 33 publications

(51 citation statements)

References 57 publications

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“…Compared to the AME2012 value, our measurement provides a ≈90-fold improvement in precision and is 157 keV more bound. The AME2012 [72] value is mainly influenced by a measurement of the Q value of the reaction 46 Ar(d, p) 47 Ar [24]. In this study the authors reported a 700-keV deviation to a previous measurement obtained from the reaction 48 Ca( 14 C, 15 O) 47 Ar [77].…”

Section: B the 47 Ar Massmentioning

confidence: 51%

“…Experimental half-lives are taken from the NUBASE2016 evaluation [74]. 47 Ar mass excess obtained in this work (red diamond) and the ones obtained in previous works [24,34,[77][78][79]. The black dashed line marks the AME2012 value while the grey band represents the AME2012 one standard deviation [72].…”

Section: B the 47 Ar Massmentioning

confidence: 92%

“…Finally, the ion bunch was transported to the precision Penning trap, where the free cyclotron frequency TABLE I. Summary of the production, preparation, and measurement conditions for the isotopes [46][47][48] Ar. For the ToF-ICR data, the exact quadrupole-excitation time applied in the measurement Penning trap is given.…”

Section: Methodsmentioning

confidence: 99%

“…One such approach, the valencespace formulation of the in-medium similarity renormalization group (VS-IMSRG) [41][42][43][44][45], opened ab initio theories to essentially all nuclei accessible to the nuclear shell model, including fully open-shell exotic systems. The VS-IMSRG provides an adequate description of the emergence of the N = 32 and N = 34 subshell closures around the calcium chain [46][47][48][49], but its ability to simultaneously describe the collapse of the N = 28 closure has not yet been tested. Another approach, the self-consistent Green's function formalism in its Gorkov formulation (SCGF) [50], can now target open-shell nuclei and thus allows the testing of various Hamiltonians along complete isotopic chains [51,52].…”

Section: Introductionmentioning

confidence: 99%

“…In this article we report on high-precision measurements of the neutron rich [46][47][48] Ar isotopes. The question of the persistence of the N = 28 gap is revisited in light of the new high-precision data.…”

Section: Introductionmentioning

confidence: 99%

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Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

et al. 2020

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The strength of the N = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of 46-48 Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the N = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the SDPF-U phenomenological shell model interaction. Our results are also compared with ab initio calculations using the valence space in-medium similarity renormalization group and the self-consistent Green's function approaches. Both calculations provide a very good account of mass systematics at and around Z = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that 46 Ar is the transition between the closed-shell 48 Ca and collective 44 S.

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Section: B the 47 Ar Massmentioning

confidence: 51%

Section: B the 47 Ar Massmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

et al. 2020

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Charge resolution in the isochronous mass spectrometry and the mass of $$^{51}$$Co

et al. 2021

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Isochronous mass spectrometry (IMS) of heavyion storage rings is a powerful tool for the mass measurements of short-lived nuclei. In IMS experiments, masses are determined through precision measurements of the revolution times of the ions stored in the ring. However, the revolution times cannot be resolved for particles with nearly the same mass-to-charge (m/q) ratios. To overcome this limitation and to extract the accurate revolution times for such pairs of ion species with very close m/q ratios, in our early work on particle identification, we analyzed the amplitudes of the timing signals from the detector based on the emission of secondary electrons. Here, the previous data analysis method is further improved by considering the signal amplitudes, detection efficiencies, and number of stored ions in the ring. A sensitive Z-dependent parameter is introduced in the data analysis, leading to a better resolution of 34 Ar 18þ and 51 Co 27þ with A=Z ¼ 17=9. The mean revolution times of 34 Ar 18þ and 51 Co 27þ are deduced, although their time difference is merely 1.8 ps. The uncorrected, overlapped peak of these ions has a full width at half maximum of 7.7 ps. The mass excess of 51 Co was determined to be À27;332ð41Þ keV, which is in agreement with the previous value of À27;342ð48Þ keV.

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New magicity N = 32 and 34 due to strong couplings between Dirac inversion partners

2020

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Masses of neutron-rich Sc52–54 and Ti54,56 nucl

Cited by 33 publications

References 57 publications

Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

Charge resolution in the isochronous mass spectrometry and the mass of $$^{51}$$Co

New magicity N = 32 and 34 due to strong couplings between Dirac inversion partners

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Masses of neutron-rich Sc52–54 and Ti54,56 nucl

Cited by 33 publications

References 57 publications

Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

Examining the N=28 shell closure through high-precision mass measurements of Ar46–48

Charge resolution in the isochronous mass spectrometry and the mass of $$^{51}$$Co

New magicity N = 32 and 34 due to strong couplings between Dirac inversion partners

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New magicity N = 32 and 34 due to strong couplings between Dirac inversion partners