High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Researc...High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target is an isotopically enriched 173Yb metallic foil of 2展开更多
Study of in-beam γ-ray spectroscopy of 146Tb has been carried out by using the 118Sn(32S,1p3n)146Tb reaction. Based on the experimental measured results, the level scheme of 146Tb has been revised significantly and e...Study of in-beam γ-ray spectroscopy of 146Tb has been carried out by using the 118Sn(32S,1p3n)146Tb reaction. Based on the experimental measured results, the level scheme of 146Tb has been revised significantly and extended up to an excitation energy of 8.39 MeV. Preliminary results of the present work have been reported in a letter. The level structure shows characteristics of a spherical nucleus. The odd-odd nucleus 146Tb has one proton-particle and one neutron-hole with respect to the doubly closed nucleus 146Gd, and its low-展开更多
A standard in-beam y-spectroscopy experiment for ^188Pt is performed via the ^176yb（^18O, 6n） reaction at beam energies of 88 and 95 MeV, and the level scheme for ^188Pt is established. Prolate and oblate shape coex...A standard in-beam y-spectroscopy experiment for ^188Pt is performed via the ^176yb（^18O, 6n） reaction at beam energies of 88 and 95 MeV, and the level scheme for ^188Pt is established. Prolate and oblate shape coexistence has been demonstrated to occur in ^188Pt by applying the projected shell model. The rotation Mignment of i13/2 neutrons drives the yrast sequence changing suddenly from prolate to oblate shape at angular momentum 1Oh, indicating likely a new type of shape phase transition along the yrast fine in ^188Pt.展开更多
High-spin Level structure of 188T1 has been studied via the 157Gd(35Cl, 4n) fusion-evaporation reaction at beam energy of 170 MeV. The 35Cl beam was provided by the JAERI tandem accelerator and impinged on an enriched...High-spin Level structure of 188T1 has been studied via the 157Gd(35Cl, 4n) fusion-evaporation reaction at beam energy of 170 MeV. The 35Cl beam was provided by the JAERI tandem accelerator and impinged on an enriched 157Gd metallic foil of 2. 0 mg/cm2 thickness with a 6. 5 mg/cm2 Pb backing.γ-γ-t and X-γ-t measurements were performed by aγ-ray detector array consisting of 13 BGO(AC) HPGe's and 3 LOAX detectors. A total of about 270×106 coincidence events were accumulated. Prior to this work, an early in-展开更多
In-beamγ-ray spectroscopic experiment for the deformed odd-A nucleus 179Pt has been performed via the 149Sm(35Cl, p4n) reaction at beam energy of 180 MeV. The 35Cl beam was provided by the tandem accelerator at the J...In-beamγ-ray spectroscopic experiment for the deformed odd-A nucleus 179Pt has been performed via the 149Sm(35Cl, p4n) reaction at beam energy of 180 MeV. The 35Cl beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target was an isotopic 149Sm foil of 1. 5 mg /cm2 thickness with a 5 me/cm2 Pb backing. Based on the measured results, three rotational展开更多
High spin states in 174Re have been re-investigated via the 152Sm(27Al,5n)174 Re reaction at a bombarding energy of 14-0 MeV. The 27Al beam was provided by the JAERI tandem accelerator and impinged on an enriched 152S...High spin states in 174Re have been re-investigated via the 152Sm(27Al,5n)174 Re reaction at a bombarding energy of 14-0 MeV. The 27Al beam was provided by the JAERI tandem accelerator and impinged on an enriched 152Sm metallic foil of 2 mg/cm2 thickness. From detailed analysis ofγ-ray excitation functions,展开更多
High-spin states in odd-odd 188Au has been reinvestigated via the heavy-ion 173Yb(19F, 4nγ) reactions at 86 and 90 MeV. The 19F beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institut...High-spin states in odd-odd 188Au has been reinvestigated via the heavy-ion 173Yb(19F, 4nγ) reactions at 86 and 90 MeV. The 19F beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target was an isotopically enriched 173Yb metallic foil of 2 mg/cm2 thickness with展开更多
High-spin states in 145Tb have been populated using the 118Sn (32S, 1p4n) reaction at beam energy of 165 MeV. The level scheme of 145Tb has been established up to Ex ≈7.4 MeV. The level scheme shows characteristics o...High-spin states in 145Tb have been populated using the 118Sn (32S, 1p4n) reaction at beam energy of 165 MeV. The level scheme of 145Tb has been established up to Ex ≈7.4 MeV. The level scheme shows characteristics of a spherical or slightly oblate nucleus. Based on the systematic trends of the level structure in the neighboring N = 80 isotones, the level structure in 145Tb below 2 MeV excitation is well explained by coupling an h11/2valence proton to the even-even 144Gd core. Above 2 MeV excitation, most of the yrast levels are interpreted with multi-quasiparticle shell-model configurations.展开更多
文摘High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target is an isotopically enriched 173Yb metallic foil of 2
基金Supported by NSFC(10005012, 10025525, 10075062)Major State Basic Research Development Program (TG2000077400).
文摘Study of in-beam γ-ray spectroscopy of 146Tb has been carried out by using the 118Sn(32S,1p3n)146Tb reaction. Based on the experimental measured results, the level scheme of 146Tb has been revised significantly and extended up to an excitation energy of 8.39 MeV. Preliminary results of the present work have been reported in a letter. The level structure shows characteristics of a spherical nucleus. The odd-odd nucleus 146Tb has one proton-particle and one neutron-hole with respect to the doubly closed nucleus 146Gd, and its low-
基金Supported by the Major State Basic Research Programme of China 2007CB815001, the National Natural Science Foundation of China under Grant No 10775158, and the Chinese Academy of Sciences.
文摘A standard in-beam y-spectroscopy experiment for ^188Pt is performed via the ^176yb（^18O, 6n） reaction at beam energies of 88 and 95 MeV, and the level scheme for ^188Pt is established. Prolate and oblate shape coexistence has been demonstrated to occur in ^188Pt by applying the projected shell model. The rotation Mignment of i13/2 neutrons drives the yrast sequence changing suddenly from prolate to oblate shape at angular momentum 1Oh, indicating likely a new type of shape phase transition along the yrast fine in ^188Pt.
文摘High-spin Level structure of 188T1 has been studied via the 157Gd(35Cl, 4n) fusion-evaporation reaction at beam energy of 170 MeV. The 35Cl beam was provided by the JAERI tandem accelerator and impinged on an enriched 157Gd metallic foil of 2. 0 mg/cm2 thickness with a 6. 5 mg/cm2 Pb backing.γ-γ-t and X-γ-t measurements were performed by aγ-ray detector array consisting of 13 BGO(AC) HPGe's and 3 LOAX detectors. A total of about 270×106 coincidence events were accumulated. Prior to this work, an early in-
基金Supported by National Natural science Foundation of China (10005012)Major State Basic Research Development Program (G2000077400)
文摘In-beamγ-ray spectroscopic experiment for the deformed odd-A nucleus 179Pt has been performed via the 149Sm(35Cl, p4n) reaction at beam energy of 180 MeV. The 35Cl beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target was an isotopic 149Sm foil of 1. 5 mg /cm2 thickness with a 5 me/cm2 Pb backing. Based on the measured results, three rotational
文摘High spin states in 174Re have been re-investigated via the 152Sm(27Al,5n)174 Re reaction at a bombarding energy of 14-0 MeV. The 27Al beam was provided by the JAERI tandem accelerator and impinged on an enriched 152Sm metallic foil of 2 mg/cm2 thickness. From detailed analysis ofγ-ray excitation functions,
基金Supported by the National Natural Sciences Foundation (10375007, 10221003, 10025505)the Major State Basic Research Devel-opment Program of China(G2000077400)the Chinese Academy of Sciences.
文摘High-spin states in odd-odd 188Au has been reinvestigated via the heavy-ion 173Yb(19F, 4nγ) reactions at 86 and 90 MeV. The 19F beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target was an isotopically enriched 173Yb metallic foil of 2 mg/cm2 thickness with
基金This work was supported by the National Natural Science Foundation of China(Grant No.10005012)the Major State Basic Research Development Program of China(Contract No.TG2000077402).
文摘High-spin states in 145Tb have been populated using the 118Sn (32S, 1p4n) reaction at beam energy of 165 MeV. The level scheme of 145Tb has been established up to Ex ≈7.4 MeV. The level scheme shows characteristics of a spherical or slightly oblate nucleus. Based on the systematic trends of the level structure in the neighboring N = 80 isotones, the level structure in 145Tb below 2 MeV excitation is well explained by coupling an h11/2valence proton to the even-even 144Gd core. Above 2 MeV excitation, most of the yrast levels are interpreted with multi-quasiparticle shell-model configurations.
