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XU Shuwei LI Zhankui XIE Yuanxiang HUANG Wenxue SHU Nengchuan CHEN Yongshou Xu Furong WANG Kun PAN Qiangyan WANG Xudong YU Yong XING Yebing 《中国科学G辑(英文版)》2005,48(3):257-267
We briefly reviewed the experimental study on β-delayed proton decays near the proton drip line published by our group during
the period of 1996–2004, namely the first observation of the β-delayed proton decays of 9 new nuclides in the rare-earth region
and the new measurements of β-delayed proton decays of 5 nuclides in the mass ∼90 region near theN=Z line with the aid of the “p-y” coincidence in combination with a He-jet tape transport system. In the meantime some important
experimental technique details were supplemented. The experimental results, including the half-lives, spins, parities, deformations
and production reaction cross sections for the 14 nuclei were summarized and compared with the current nuclear-model predictions,
and then the following points were represented. (1) The experimental half-lives for85Mo and92Rh as well as the predicted “waiting point” nuclei89Ru and93Pd are 5–10 times longer than the theoretical predictions given by M?ller et al. using a macroscopic-microscopic model. It
considerably influences the predictions of the abundances of the nuclides produced in the rp-process. (2) The current-model
predictions are not consistent with the experimental assignments of the spins and parities for the proton drip-line nuclei142Ho and128Pm. However, the nuclear potential energy surface (PES) calculated by using a Woods-Saxon-Strutinsky method reproduced the
experimental results. (3) The Alice code overestimated the production reaction cross sections of the studied 9 rare-earth
nuclei by one order of magnitude or two, while HIVAP code overestimated them by one order of magnitude approximately. 相似文献
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The proton-rich isotope 146Ho was produced via the fusion-evaporation reaction ^92Mo (^58Ni, 3p1n). The β-delayed proton decay of 146Ho was studied by proton-γ coincidence measurements using a He-jet tape transport system. The γ-transitions in ^145Tb following the proton emissions were observed, and the β-delayed proton branching ratios to the final states in the grand-daughter nucleus ^145Tb were determined. According to the relative branching ratios, the ground-state spin of 146Ho has been proposed and the possible configuration discussed. 相似文献
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MA Fei ZHOU Xiao-Hong ZHENG Yong XU Shu-Wei XIE Yuan-Xiang CHEN Liang LEI Xiang-Guo GUO Ying-Xiang ZHANG Yu-Hu LI Zhan-Kui GUO Song DING Bing ZHOU Hou-Bing LI Guang-Shun WANG Hai-Xia 《中国物理C(英文版)》2010,34(8):1082-1084
The proton-rich isotope 146Ho was produced via the fusion-evaporation reaction 92Mo (58Ni, 3p1n). The β-delayed proton decay of 146Ho was studied by proton-γ coincidence measurements using a He-jet tape transport system. The γ-transitions in 145Tb following the proton emissions were observed, and the β-delayed proton branching ratios to the final states in the grand-daughter nucleus 145Tb were determined. According to the relative branching ratios, the ground-state spin of 146Ho has been proposed and the possible configuration discussed. 相似文献
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