Direct mass measurements of neutron-rich <sup>86</sup>Kr projectile fragments and the persistence of neutron magic number <em>N</em>=32 in Sc isotopes

XU Xing; WANG Meng; ZHANG Yu-Hu; et al. (BESⅢ collaboration)

doi:10.1088/1674-1137/39/10/104001

Chinese Physics C> 2015, Vol. 39> Issue(10) : 104001 DOI: 10.1088/1674-1137/39/10/104001

Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

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In this paper, we present direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing the Isochronous Mass Spectrometry (IMS) method. The new mass excesses of ^52-54Sc nuclides are determined to be -40492(82), -38928(114), -34654(540) keV, which show a significant increase of binding energy compared to the reported ones in the Atomic Mass Evaluation 2012 (AME12). In particular, ⁵³Sc and ⁵⁴Sc are more bound by 0.8 MeV and 1.0 MeV, respectively. The behavior of the two neutron separation energy with neutron numbers indicates a strong sub-shell closure at neutron number N=32 in Sc isotopes.

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XU Xing, WANG Meng, ZHANG Yu-Hu and et al. (BESⅢ collaboration). Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes[J]. Chinese Physics C, 2015, 39(10): 104001. doi: 10.1088/1674-1137/39/10/104001

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Received: 2015-03-19
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

Corresponding author: WANG Meng,

Corresponding author: ZHANG Yu-Hu,

Received Date: 2015-03-19

Accepted Date: 1900-01-01

Available Online: 2015-10-10

Abstract: In this paper, we present direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing the Isochronous Mass Spectrometry (IMS) method. The new mass excesses of ^52-54Sc nuclides are determined to be -40492(82), -38928(114), -34654(540) keV, which show a significant increase of binding energy compared to the reported ones in the Atomic Mass Evaluation 2012 (AME12). In particular, ⁵³Sc and ⁵⁴Sc are more bound by 0.8 MeV and 1.0 MeV, respectively. The behavior of the two neutron separation energy with neutron numbers indicates a strong sub-shell closure at neutron number N=32 in Sc isotopes.

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Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

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Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

Corresponding author: WANG Meng,

Corresponding author: ZHANG Yu-Hu,

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Direct mass measurements of neutron-rich 86Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

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通讯作者: 陈斌, bchen63@163.com

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Direct mass measurements of neutron-rich 86Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

Corresponding author: WANG Meng,

Corresponding author: ZHANG Yu-Hu,

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Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

Direct mass measurements of neutron-rich ⁸⁶Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes