The high-spin states of very neutron-deficient doubly odd nucleus ^190T1 have been investigated via the ^160Gd(^35C1, 5n)^190T1 reaction by using techniques of in-beam γ-ray spectroscopy. Measurements of X-γ and γ-...The high-spin states of very neutron-deficient doubly odd nucleus ^190T1 have been investigated via the ^160Gd(^35C1, 5n)^190T1 reaction by using techniques of in-beam γ-ray spectroscopy. Measurements of X-γ and γ-γ-t coincidences were performed with 12BGO(AC)HPGe detectors. Based on the gated spectra, γ-γ coinci-dence relationships, γ ray energy sums, γ ray relative intensities and the previous work, the level展开更多
The high-spin level structures of doubly odd nucleus ^140Pr have been investigated by means of the ^130Te(^14N,4n)^140Pr reaction. The ^14N beam was obtained from the HI-13 tandem accelerator of China Institute of Ato...The high-spin level structures of doubly odd nucleus ^140Pr have been investigated by means of the ^130Te(^14N,4n)^140Pr reaction. The ^14N beam was obtained from the HI-13 tandem accelerator of China Institute of Atomic Energy, Beijing. The target is an enriched ^130Te metallic foil of 1.67mg/cm^2 thickness with a 10.37mg/cm^2 Pb backing. Measurements of γ-ray singles, γ-γ-t coincidences and γ-ray excitation function were performed with twelve BGO(AC)HPGe detectors. Based on detailed analysis of γ-γ coincidence relationships,展开更多
New Isotope ^265Bh was produced in bombardment of a ^243Am target with 168 MeV 26Mg ions. The experiment was carried out at the Sector Focus Cyclotron of Heavy Ion Research Facility in Lanzhou in 2003. The reaction pr...New Isotope ^265Bh was produced in bombardment of a ^243Am target with 168 MeV 26Mg ions. The experiment was carried out at the Sector Focus Cyclotron of Heavy Ion Research Facility in Lanzhou in 2003. The reaction products were transported and collected by using helium-jet technique and a set of rotating wheel system. Identification was made by observation of correlated a-particles between the new isotope ^265Bh and its ^261Db and ^257Lr daughter nuclei. A parent-daughter searching mode was used to facilitate detection of α-α correlations. A total of four pairs of PIPS detector (200mm^2 active area) were used to measure the kinetic energy of a particles. The a particle energy resolution was about 40 keV for the top detectors and 100 keV for the bottom detectors because of energy degradation in the polypropylene foil.展开更多
High-spin states in ^179Au have been studied experimentally by using the ^149Sm(^35C1, 5n) reaction at beam energies of 164,~180 MeV. The ^35C1 beam was provided by the tandem accelerator at the Japan Atomic En-ergy R...High-spin states in ^179Au have been studied experimentally by using the ^149Sm(^35C1, 5n) reaction at beam energies of 164,~180 MeV. The ^35C1 beam was provided by the tandem accelerator at the Japan Atomic En-ergy Research Institute (JAERI). The target is an isotopically enriched ^149Sm metallic foil of 1.5 mg/cm^2 thickness with a 5.0 mg/cm^2 Pb backing. Measurements of γ-ray excitation functions, X-γ coincidences and γ-γ-t coincidences were performed with 13 HPGe's with BGO anti-Compton shields and three LOAX detectors.展开更多
High-spin states in doubly odd ^170Re nucleus have been investigated for the first time, through in-beam γ-ray spectroscopy, following the ^142Nd(^32S, 1p3n γ) ^170Re reaction at 166 McV bombarding energy. The ^32 S...High-spin states in doubly odd ^170Re nucleus have been investigated for the first time, through in-beam γ-ray spectroscopy, following the ^142Nd(^32S, 1p3n γ) ^170Re reaction at 166 McV bombarding energy. The ^32 Sbeam was provided by the tandem accelerator at the China Institute of Atomic Energy, Bcijing. The ^142 Ndtarget is an enriched metallic foil of about 2.2 mg/cm^2 thickness with a 7.0 mg/cm^2 Pb backing to stop the recoiling nuclei. Measurement of X-γ, and γ-γ coincidences wcrc performed with 12 BGO(AC)HPGc detectors. A total of 150 million coincidence events wcrc recorded. The detector energies and cfficicncics wcrc展开更多
High spin states of ^135La have been experimentally studied by ^128Te(^10B, 3n)^135La reaction. The ^10B beam was provided by the tandem accelerator laboratory in the University of Tsukuba, Japan. Based on the γ-γ c...High spin states of ^135La have been experimentally studied by ^128Te(^10B, 3n)^135La reaction. The ^10B beam was provided by the tandem accelerator laboratory in the University of Tsukuba, Japan. Based on the γ-γ coincidence relationships, relative intensities and ADO ratios, a level scheme of ^135La has been established.展开更多
文摘The high-spin states of very neutron-deficient doubly odd nucleus ^190T1 have been investigated via the ^160Gd(^35C1, 5n)^190T1 reaction by using techniques of in-beam γ-ray spectroscopy. Measurements of X-γ and γ-γ-t coincidences were performed with 12BGO(AC)HPGe detectors. Based on the gated spectra, γ-γ coinci-dence relationships, γ ray energy sums, γ ray relative intensities and the previous work, the level
文摘The high-spin level structures of doubly odd nucleus ^140Pr have been investigated by means of the ^130Te(^14N,4n)^140Pr reaction. The ^14N beam was obtained from the HI-13 tandem accelerator of China Institute of Atomic Energy, Beijing. The target is an enriched ^130Te metallic foil of 1.67mg/cm^2 thickness with a 10.37mg/cm^2 Pb backing. Measurements of γ-ray singles, γ-γ-t coincidences and γ-ray excitation function were performed with twelve BGO(AC)HPGe detectors. Based on detailed analysis of γ-γ coincidence relationships,
文摘New Isotope ^265Bh was produced in bombardment of a ^243Am target with 168 MeV 26Mg ions. The experiment was carried out at the Sector Focus Cyclotron of Heavy Ion Research Facility in Lanzhou in 2003. The reaction products were transported and collected by using helium-jet technique and a set of rotating wheel system. Identification was made by observation of correlated a-particles between the new isotope ^265Bh and its ^261Db and ^257Lr daughter nuclei. A parent-daughter searching mode was used to facilitate detection of α-α correlations. A total of four pairs of PIPS detector (200mm^2 active area) were used to measure the kinetic energy of a particles. The a particle energy resolution was about 40 keV for the top detectors and 100 keV for the bottom detectors because of energy degradation in the polypropylene foil.
文摘High-spin states in ^179Au have been studied experimentally by using the ^149Sm(^35C1, 5n) reaction at beam energies of 164,~180 MeV. The ^35C1 beam was provided by the tandem accelerator at the Japan Atomic En-ergy Research Institute (JAERI). The target is an isotopically enriched ^149Sm metallic foil of 1.5 mg/cm^2 thickness with a 5.0 mg/cm^2 Pb backing. Measurements of γ-ray excitation functions, X-γ coincidences and γ-γ-t coincidences were performed with 13 HPGe's with BGO anti-Compton shields and three LOAX detectors.
文摘High-spin states in doubly odd ^170Re nucleus have been investigated for the first time, through in-beam γ-ray spectroscopy, following the ^142Nd(^32S, 1p3n γ) ^170Re reaction at 166 McV bombarding energy. The ^32 Sbeam was provided by the tandem accelerator at the China Institute of Atomic Energy, Bcijing. The ^142 Ndtarget is an enriched metallic foil of about 2.2 mg/cm^2 thickness with a 7.0 mg/cm^2 Pb backing to stop the recoiling nuclei. Measurement of X-γ, and γ-γ coincidences wcrc performed with 12 BGO(AC)HPGc detectors. A total of 150 million coincidence events wcrc recorded. The detector energies and cfficicncics wcrc
文摘High spin states of ^135La have been experimentally studied by ^128Te(^10B, 3n)^135La reaction. The ^10B beam was provided by the tandem accelerator laboratory in the University of Tsukuba, Japan. Based on the γ-γ coincidence relationships, relative intensities and ADO ratios, a level scheme of ^135La has been established.
