Ultra-short lifetime isomer studies from photonuclear reactions using laser-driven ultra-intense {\gamma}-ray
Abstract
Isomers, ubiquitous populations of relatively long-lived nuclear excited states, play a crucial role in nuclear physics. However, isomers with half-life times of several seconds or less barely had experimental cross section data due to the lack of a suitable measuring method. We report a method of online {\gamma} spectroscopy for ultra-short-lived isomers from photonuclear reactions using laser-driven ultra-intense {\gamma}-rays. The fastest time resolution can reach sub-ps level with {\gamma}-ray intensities >10^{19}/s ({\geqslant} 8 MeV). The ^{115}In({\gamma}, n)^{114m2}In reaction (T_{1/2} = 43.1 ms) was first measured in the high-energy region which shed light on the nuclear structure studies of In element. Simulations showed it would be an efficient way to study ^{229m}Th (T_{1/2} = 7 {\mu}s), which is believed to be the next generation of nuclear clock. This work offered a unique way of gaining insight into ultra-short lifetimes and promised an effective way to fill the gap in relevant experimental data.
Cite
@article{arxiv.2402.15187,
title = {Ultra-short lifetime isomer studies from photonuclear reactions using laser-driven ultra-intense {\gamma}-ray},
author = {Di Wu and Haoyang Lan and Jiaxing Liu and Huangang Lu and Jianyao Zhang and Jianfeng Lv and Xuezhi Wu and Hui Zhang and Yadong Xia and Qiangyou He and Jie Cai and Qianyi Ma and Yuhui Xia and Zhenan Wang and Meizhi Wang and Zhiyan Yang and Xinlu Xu and Yixing Geng and Chen Lin and Wenjun Ma and Yanying Zhao and Haoran Wang and Fulong Liu and Chuangye He and Jinqing Yu and Bing Guo and Guoqiang Zhang and Furong Xu and Naiyan Wang and Yugang Ma and Gérard Mourou and Xueqing Yan},
journal= {arXiv preprint arXiv:2402.15187},
year = {2024}
}