Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106,108Sn
Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106,108Sn
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缺中子锡核中的配对四极相互作用:106,108Sn 中低位态的首次寿命测量
DOI:
10.1016/j.physletb.2020.135474
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发表时间:
2020
影响因子:
4.4
通讯作者:
Siciliano M
中科院分区:
文献类型:
--
作者:
Siciliano M
The lifetimes of the low-lying excited states 2+ and 4+ have been directly measured in the neutron-deficient 106,108 Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted γ rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B (E 2; 2 1+→ 0 g. s.+) values and it describes well the experimental pattern for 104− 114 Sn; the B (E 2; 4 1+→ 2 1+) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in 108 Sn.
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