Fine structure in the $\alpha$ decay of $^{223}$U
Abstract
Fine structure in the decay of U was observed in the fusion-evaporation reaction Re(Ar, p3n) by using fast digital pulse processing technique. Two -decay branches of U feeding the ground state and 244 keV excited state of Th were identified by establishing the decay chain U Th Ra Rn. The -particle energy for the ground-state to ground-state transition of U was determined to be 8993(17) keV, 213 keV higher than the previous value, the half-life was updated to be 62 s. Evolution of nuclear structure for = 131 even- isotones from Po to U was discussed in the frameworks of nuclear mass and reduced -decay width, a weakening octupole deformation in the ground state of U relative to its lighter isotones Ra and Th was suggested.
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Cite
@article{arxiv.1904.04961,
title = {Fine structure in the $\alpha$ decay of $^{223}$U},
author = {M. D. Sun and Z. Liu and T. H. Huang and W. Q. Zhang and A. N. Andreyev and B. Ding and J. G. Wang and X. Y. Liu and H. Y. Lu and D. S. Hou and Z. G. Gan and L. Ma and H. B. Yang and Z. Y. Zhang and L. Yu and J. Jiang and K. L. Wang and Y. S. Wang and M. L. Liu and Z. H. Li and J. Li and X. Wang and A. H. Feng and C. J. Lin and L. J. Sun and N. R. Ma and W. Zuo and H. S. Xu and X. H. Zhou and G. Q. Xiao and C. Qi and F. S. Zhang},
journal= {arXiv preprint arXiv:1904.04961},
year = {2019}
}
Comments
6 pages, 6 figures