The new thorium isotope ^(207)Th has been produced in the 5n evaporation channel of the fusion reaction ^(36)Ar+^(176)Hf.The 197-199 MeV ^(36)Ar^(11+)beam with a typical intensity of0.4 pμA was delivered by the Secto...The new thorium isotope ^(207)Th has been produced in the 5n evaporation channel of the fusion reaction ^(36)Ar+^(176)Hf.The 197-199 MeV ^(36)Ar^(11+)beam with a typical intensity of0.4 pμA was delivered by the Sector Focusing Cyclotron of the Heavy Ion Research Facility in Lanzhou(HIRFL),China.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
In order to systematically investigate the-decay properties of U-isotopes near the N=126 shell and study the fine structures of 218Pa and 211−213Th,enriched targets,180W,182Wand 176Hf,were bombarded by the 36Ar and 40...In order to systematically investigate the-decay properties of U-isotopes near the N=126 shell and study the fine structures of 218Pa and 211−213Th,enriched targets,180W,182Wand 176Hf,were bombarded by the 36Ar and 40Ar beams provided the Heavy Ion Research Facility in Lanzhou(HIRFL).Combinations of beam and target as well as the beam energy,beam intensity,target thickness,irradiation time were listed in Table 1.Fusion-evaporation residues(ERs)were recoiled from the targets and separated from the primary beams using the gas filled recoil separator,SHANS[1].After passing through a multi-wire proportional chamber,the ERs were implanted into a Si-box detector[2]amounted at the focal plane of SHANS.Gamma rays emitted from the ERs were detected by three Ge detectors attached to the Si-box.All-decay and gamma-ray signals were registered and proceeded by a digital data acquisition system.展开更多
基金Strategic Priority Research Program of Chinese Academy of Sciences(XDB34010000)Guangdong Major Project of Basic and Applied Basic Research(2021B0301030006)+1 种基金National Key R&D Program of China(2018YFA0404402)Frontier Science Key Project of Chinese Academy of Sciences(ZDBS-LY-SLH017)。
文摘The new thorium isotope ^(207)Th has been produced in the 5n evaporation channel of the fusion reaction ^(36)Ar+^(176)Hf.The 197-199 MeV ^(36)Ar^(11+)beam with a typical intensity of0.4 pμA was delivered by the Sector Focusing Cyclotron of the Heavy Ion Research Facility in Lanzhou(HIRFL),China.
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.
文摘In order to systematically investigate the-decay properties of U-isotopes near the N=126 shell and study the fine structures of 218Pa and 211−213Th,enriched targets,180W,182Wand 176Hf,were bombarded by the 36Ar and 40Ar beams provided the Heavy Ion Research Facility in Lanzhou(HIRFL).Combinations of beam and target as well as the beam energy,beam intensity,target thickness,irradiation time were listed in Table 1.Fusion-evaporation residues(ERs)were recoiled from the targets and separated from the primary beams using the gas filled recoil separator,SHANS[1].After passing through a multi-wire proportional chamber,the ERs were implanted into a Si-box detector[2]amounted at the focal plane of SHANS.Gamma rays emitted from the ERs were detected by three Ge detectors attached to the Si-box.All-decay and gamma-ray signals were registered and proceeded by a digital data acquisition system.
基金National Natural Science Foundation of China(11505035,11465005,11505056,11605054,11675266,U1732138,11775057,11765004,11565008)Natural Science Foundation of Guangxi,China(2017GXNSFAA198160,2015GXNSFDA139004)Project of Innovative Team and Distinguished Scholar in Institutions of Higher Education of Guangxi,China~~
