The excited states in 207Rn were populated in the reaction 196Pt(16O, 5n) 207Rn with a beam energy of 95 MeV. Measurements of 7-ray excitation function and 7-7 coincidence were carried out. Based on the experimental d...The excited states in 207Rn were populated in the reaction 196Pt(16O, 5n) 207Rn with a beam energy of 95 MeV. Measurements of 7-ray excitation function and 7-7 coincidence were carried out. Based on the experimental data, a level scheme of 207Rn was proposed as shown in Pig.1. Level spins were assigned from the measured DCO ratios.展开更多
Excited states of ^134Ba, populated via the heavy-ion induced ^128Te(^10B, 1p3n)134Ba reaction at 46 MeV beam energy, have been studied to medium and high spins by in-beam γ-ray spectroscopy techniques. The experimen...Excited states of ^134Ba, populated via the heavy-ion induced ^128Te(^10B, 1p3n)134Ba reaction at 46 MeV beam energy, have been studied to medium and high spins by in-beam γ-ray spectroscopy techniques. The experiment was performed at the tandem accelerator laboratory in the University of Tsukuba, Japan. The target is an isotopically enriched ^128Te metallic foil of 2.3mg/cm^2 thickness with a 3mg/cm^2 gold backing. Nine anti-Compton HPGe detectors were employed for the measurements of γ-γ-t coincidences. The level scheme of ^134Ba, deduced from this study, was shown in Fig.1.展开更多
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
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
基金Supported by NSFC (10075062) and Major State Basic Research Development Progam.
文摘The excited states in 207Rn were populated in the reaction 196Pt(16O, 5n) 207Rn with a beam energy of 95 MeV. Measurements of 7-ray excitation function and 7-7 coincidence were carried out. Based on the experimental data, a level scheme of 207Rn was proposed as shown in Pig.1. Level spins were assigned from the measured DCO ratios.
文摘Excited states of ^134Ba, populated via the heavy-ion induced ^128Te(^10B, 1p3n)134Ba reaction at 46 MeV beam energy, have been studied to medium and high spins by in-beam γ-ray spectroscopy techniques. The experiment was performed at the tandem accelerator laboratory in the University of Tsukuba, Japan. The target is an isotopically enriched ^128Te metallic foil of 2.3mg/cm^2 thickness with a 3mg/cm^2 gold backing. Nine anti-Compton HPGe detectors were employed for the measurements of γ-γ-t coincidences. The level scheme of ^134Ba, deduced from this study, was shown in Fig.1.
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.
