A new transuranium neutron-deficient isotope ^(235)Am was produced via the reaction of ^(238)Pu(p,4n)^(235)Am by using a 35 MeV proton beam.The recoiled products were collected by a helium-jet and long-capillary syste...A new transuranium neutron-deficient isotope ^(235)Am was produced via the reaction of ^(238)Pu(p,4n)^(235)Am by using a 35 MeV proton beam.The recoiled products were collected by a helium-jet and long-capillary system.Americium isotopes were separated out by a rapid radiochemical method.X-ray,γ-ray,and x-γ coincidence measurements were taken in the study.According to ^(235)Pu decay γ-ray and Np K x-ray growth-decay property,^(235)Am was definitely identified and its half life is determined as 15±5 min.展开更多
The Boltzmann-Nordheim-Vlasov (BNV) model was employed to investigate the giant monopole resonance (GMR) built on very excited residula nuclei formed in heavy-ion collisions. Roughly speaking the GMR energy of BNV mod...The Boltzmann-Nordheim-Vlasov (BNV) model was employed to investigate the giant monopole resonance (GMR) built on very excited residula nuclei formed in heavy-ion collisions. Roughly speaking the GMR energy of BNV model is very similar to the value given by the empirical formual EGMR = 31.2A^(-l/3) + 20.6A^(-l/6) and hardly changes with impact parameter and bombarding energy.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19475052Chinese Academy of Sciences.
文摘A new transuranium neutron-deficient isotope ^(235)Am was produced via the reaction of ^(238)Pu(p,4n)^(235)Am by using a 35 MeV proton beam.The recoiled products were collected by a helium-jet and long-capillary system.Americium isotopes were separated out by a rapid radiochemical method.X-ray,γ-ray,and x-γ coincidence measurements were taken in the study.According to ^(235)Pu decay γ-ray and Np K x-ray growth-decay property,^(235)Am was definitely identified and its half life is determined as 15±5 min.
基金the Foundation of the Chinese Academy of Sciences。
文摘The Boltzmann-Nordheim-Vlasov (BNV) model was employed to investigate the giant monopole resonance (GMR) built on very excited residula nuclei formed in heavy-ion collisions. Roughly speaking the GMR energy of BNV model is very similar to the value given by the empirical formual EGMR = 31.2A^(-l/3) + 20.6A^(-l/6) and hardly changes with impact parameter and bombarding energy.
