摘要
Delayed γ-ray spectroscopy of^(185)Au was studied at the Argonne Gas-Filled Analyzer.A new isomer at an excitation energy of 1504.2(4) keV with a half-life of 630(80) ns was identified via γ-γ coincidence analysis,decaying via a 294.8(3) keV transition.Based on Weisskopf estimates,the multipolarity of the 295 keV transition is assigned to be E1,M1,E2,or M2.Possible configurations for this new isomer are discussed based on configurationconstrained potential energy surface calculations.
基金
Supported by the National Natural Science Foundation of China (12405140, 12135004, 11961141004, U2032138, 12275369)
the Natural Science Foundation of Gansu Province, China (24JRRA033)
financial support from the STFC
funded by the Chinese Academy of Sciences President's International Fellowship Initiative (2020VMA0017)
Supported by the U.S. Department of Energy, Office of Nuclear Physics, (DE-AC02-06CH11357, DE-FG02-94ER41041 (UNC), DE-FG02-97ER41033 (TUNL))
supported by the Slovak Research and Development Agency (APVV-22-0282)
Slovak Grant Agency VEGA (1/0019/25)。
