<sup>192</sup>Tl高自旋态能级结构研究

贺创业; 郑云; 李聪博; 吴晓光; 李广生; 钟健; 陈启明; 朱保吉; 邓立涛; 周文奎; 樊启文

doi:10.11804/NuclPhysRev.34.03.465

¹⁹²Tl高自旋态能级结构研究

High Spin Level Structure of ¹⁹²Tl

摘要

摘要: 通过熔合蒸发反应¹⁸¹Ta（¹⁶O，5n）¹⁹²Tl，在入射束流为97 MeV能量下，布居¹⁹²Tl的高自旋态，更新了¹⁹²Tl的能级纲图。共增加8条新能级，尝试性地指定了能级自旋，将负宇称晕带的能级推高到23-ħ。讨论了¹⁹²Tl与相邻同位素奇奇核^{194，196，198}Tl负宇称晕带的旋称劈裂与反转现象，发现随着中子数增加，^196，198Tl在高自旋处出现了旋称反转，其原因可能是由于中子质子相互作用与科里奥利力相互竞争所致。

High spin states of ¹⁹²Tl were populated by the ¹⁸¹Ta(¹⁶O, 5n)¹⁹²Tl heavy ion fusion evaporation reaction at 97 MeV beam energy. A new level scheme with 8 new levels was constructed and the level spins were tentatively assigned. The negative yrast band was extended up to 23-ħ. Systematics of signature of inversion were also discussed for the negative yrast band of odd-odd Tl istopes. Signature inversion has been found in ^196,198Tl with neutron number increasing in these four Tl isotopes, and it is explained by the competition between the strength of n-p interaction and Coriolis force.

Abstract: High spin states of ¹⁹²Tl were populated by the ¹⁸¹Ta(¹⁶O, 5n)¹⁹²Tl heavy ion fusion evaporation reaction at 97 MeV beam energy. A new level scheme with 8 new levels was constructed and the level spins were tentatively assigned. The negative yrast band was extended up to 23-ħ. Systematics of signature of inversion were also discussed for the negative yrast band of odd-odd Tl istopes. Signature inversion has been found in ^196,198Tl with neutron number increasing in these four Tl isotopes, and it is explained by the competition between the strength of n-p interaction and Coriolis force.

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192Tl高自旋态能级结构研究

High Spin Level Structure of 192Tl

¹⁹²Tl高自旋态能级结构研究

High Spin Level Structure of ¹⁹²Tl