High Spin Level Structure of 192Tl
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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194，196，198Tl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.-
Key words:
- fusion evaporation reaction /
- level scheme /
- backbending /
- signature inversion
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