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,...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.展开更多
Neutron-de cient nuclei around mid-shell at N-104 in the lead region provide many cases of shape coexistence and shape isomers^([1,2]).In order to study shape coexistence in this region,prompt and delayed-ray spectros...Neutron-de cient nuclei around mid-shell at N-104 in the lead region provide many cases of shape coexistence and shape isomers^([1,2]).In order to study shape coexistence in this region,prompt and delayed-ray spectroscopy of the^(187)Pb,^(183)Hg,^(188)Bi and^(188)Po nuclei produced by the fusion-evaporation reaction^(50)Cr+^(142)Nd→192Po^(*)has been performed at the Argonne Gas-Filled Analyzer.展开更多
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)+4 种基金financial support from the STFCfunded 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)。
文摘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Strategic Priority Research Program of Chinese Academy of Sciences(XDB34000000)National Key R&D Program of China(2018YFA0404402)+2 种基金National Natural Science Foundation of China(12135004,11635003,11961141004,11735017 and U2032138)Chinese Academy of Sciences Presidents International Fellowship Initiative(2020VMA0017)U.S.Department of Energy,Office of Nuclear Physics(DE-AC02-06CH11357,DE-FG02-94ER41041(UNC)and DE-FG02-97ER41033(TUNL))。
文摘Neutron-de cient nuclei around mid-shell at N-104 in the lead region provide many cases of shape coexistence and shape isomers^([1,2]).In order to study shape coexistence in this region,prompt and delayed-ray spectroscopy of the^(187)Pb,^(183)Hg,^(188)Bi and^(188)Po nuclei produced by the fusion-evaporation reaction^(50)Cr+^(142)Nd→192Po^(*)has been performed at the Argonne Gas-Filled Analyzer.
