The complete fusion reaction of^(55)Mn+^(159)Tb was studied on the gafilled recoil separator SHANS2.Nineteen ER-α1-α2 decay chains from^(210)Th produced from the 4n evaporation channel were observed.The a-particle e...The complete fusion reaction of^(55)Mn+^(159)Tb was studied on the gafilled recoil separator SHANS2.Nineteen ER-α1-α2 decay chains from^(210)Th produced from the 4n evaporation channel were observed.The a-particle energy and half-life of 210Th were determined as 7922(14)keV and 14(4)ms,respectively.In addition,the decay properties of Eα=7788(14)keV and T_(1/2)=36+15-8 ms were obtained for 21Th.The measured a decay prop-erties of^(210)Th and^(211)Th were consistent with literature data.The cross sections were measured to be 0.59+035 nb and 0.19-012 nb for^(210)Th and^(211)Th,respectively.The equilibrium charge state of the recoiled nucleus^(210)Th was determined experimentally.The new data were helpful for estimating the equilibrium charge states of elements 119 and 120,which could be produced via the^(240)Pu(^(55)Mn,3n)^(292)119 and^(243)Am(^(55)Mn,3m)^(295)120 reactions,respect-ively.展开更多
In recent decades,much experimental progress has been made in the synthesis of SHEs and several attempts have been made.However,none of these experiments provide evidence for the successful synthesis of the new elemen...In recent decades,much experimental progress has been made in the synthesis of SHEs and several attempts have been made.However,none of these experiments provide evidence for the successful synthesis of the new elements.In order to produce the new elements with proton number Z=119 or 120,IMP-CAS(Institute of Modern Physics,Chinese Academy of Sciences)constructed the China Accelerator Facility for superheavy Elements(CAFE2).The beams with medium mass,such as ^(50)Ti,^(51)V,^(54)Cr,^(55)Mn.展开更多
基金Supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB34010000)the Guangdong Major Project of Basic and Applied Basic Research (2021B0301030006)+5 种基金the National Key R&D Program of China (2018YFA0404402)the CAS Project for Young Scientists in Basic Research (YSBR-002)the Youth Innovation Promotion Association CAS (2020409)the National Natural Science Foundation of China (11975279,11965003,12105328)the Special Research Assistant Project of the Chinese Academy of Sciencesthe Central Government Guidance Funds for Local Scientific and Technological Development,China (Guike ZY22096024)
文摘The complete fusion reaction of^(55)Mn+^(159)Tb was studied on the gafilled recoil separator SHANS2.Nineteen ER-α1-α2 decay chains from^(210)Th produced from the 4n evaporation channel were observed.The a-particle energy and half-life of 210Th were determined as 7922(14)keV and 14(4)ms,respectively.In addition,the decay properties of Eα=7788(14)keV and T_(1/2)=36+15-8 ms were obtained for 21Th.The measured a decay prop-erties of^(210)Th and^(211)Th were consistent with literature data.The cross sections were measured to be 0.59+035 nb and 0.19-012 nb for^(210)Th and^(211)Th,respectively.The equilibrium charge state of the recoiled nucleus^(210)Th was determined experimentally.The new data were helpful for estimating the equilibrium charge states of elements 119 and 120,which could be produced via the^(240)Pu(^(55)Mn,3n)^(292)119 and^(243)Am(^(55)Mn,3m)^(295)120 reactions,respect-ively.
基金Strategic Priority Research Program of Chinese Academy of Sciences(XDB34010000)Guangdong Major Project of Basic and Applied Basic Research(2021B0301030006)+4 种基金National Key R&D Program of China(2018YFA0404402)CAS Project for Young Scientists in Basic Research(YSBR-002)Youth Innovation Promotion Association CAS(2020409)National Natural Science Foundation of China(11975279,11965003,12105328)Special Research Assistant Project of Chinese Academy of Sciences and Central Government Guidance Funds for Local Scientific and Technological Development(Guike ZY22096024)。
文摘In recent decades,much experimental progress has been made in the synthesis of SHEs and several attempts have been made.However,none of these experiments provide evidence for the successful synthesis of the new elements.In order to produce the new elements with proton number Z=119 or 120,IMP-CAS(Institute of Modern Physics,Chinese Academy of Sciences)constructed the China Accelerator Facility for superheavy Elements(CAFE2).The beams with medium mass,such as ^(50)Ti,^(51)V,^(54)Cr,^(55)Mn.
