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Andel, B.*; Van Duppen, P.*; Andreyev, A. N.; Blazhev, A.*; Grawe, H.*; Lica, R.*; Nadja, H.*; Stryjczyk, M.*; 他52名*
Physical Review C, 104(5), p.054301_1 - 054301_13, 2021/11
被引用回数:1 パーセンタイル:18.91(Physics, Nuclear)A new -decaying state in Bi has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred assignment was suggested for this state based on the -decay feeding pattern to levels in Po and shell-model calculations. The half-life of the state was deduced to be min. The deexcitation of the levels populated in Po by the decay of this state was investigated via coincidences and a number of new levels and transitions were identified. Shell-model calculations for excited states in Bi and Po were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new -decaying state as an isomer and allow for the tentative assignment of shell-model states to several high-spin states in Po.
Stryjczyk, M.*; Andel, B.*; Andreyev, A. N.; Cubiss, J.*; Pakarinen, J.*; 他43名*
Physical Review C, 102(2), p.024322_1 - 024322_9, 2020/08
被引用回数:4 パーセンタイル:45.12(Physics, Nuclear)Decay spectroscopy of the long-lived states in Tl has been performed at ISOLDE, CERN. The decay from the low-spin (2) state in Tl was observed for the first time and a half-life was determined. Based on the -decay energy, the relative positions of the long-lived states were fixed, with the (2) state as the ground state, the 7 state at 77(56) keV, and the 10 state at 451(56) keV. The level scheme of the internal decay of the Tl(10) state, which was known to decay solely through emission of 374-keV -ray transition, was extended and a lower limit for the -decay branching b 5.9(3)% was determined. The extracted retardation factors for the decay of the 10 state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the d shell in the isomeric decay and significant structure differences between Tl and Tl.
Cubiss, J. G.*; Andreyev, A. N.; Barzakh, A. E.*; Andel, B.*; Antalic, S.*; Cocolios, T. E.*; Day Goodacre, T.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; et al.
Physical Review C, 99(6), p.064317_1 - 064317_6, 2019/06
被引用回数:6 パーセンタイル:53.97(Physics, Nuclear)Atの崩壊について、CERN-ISOLDE施設においてレーザーイオン化法を使うことで研究した。-同時計数データを初めて取得し、より精度の良い半減期の値として1.27(6)秒を得た。崩壊の微細構造を基に新しい崩壊図式を構築した。それらの結果から、Atの基底状態のスピン・パリティは(3)がより確からしいことが解ったが、(2)の可能性も完全には否定しきれない。