Excited States in Neutron-Deficient ~(197)Bi

来源 :Chinese Journal of Nuclear Physics | 被引量 : 0次 | 上传用户:king0083
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The high-spin states in ~(197)Bi are studied with the ~(197)Re(~(16)O, 6n) reaction, theenergies of ~(16)O being between 85 and 105 MeV. In-beam measurements of γ-ray excitation func-tions, γ-γ-t coincidences and γ-ray angular distributions are performed with six BGO (AC)HPGe detectors and one intrinsic Ge planar detector. Eleven new transitions and three new iso-mers at 2089, 2357 and 1968+△keV with T_(1/2)=19, 34±4, 9, 53, 4±20. 5 and 18. 04±3. 1 ns,respectively, are observed, and a level scheme established. In addition, a half-life of 36. 7±7.0 ns was determined for the first time for the previously established 2065 keV isomer. The high-spin states in ~ (197) Bi are studied with ~ (197) Re (~ (16) O, 6n) reactions, the energy of ~ (16) O being between 85 and 105 MeV. γ-ray excitation func-tions, γ-γ-t coincidences and γ-ray angular distributions are performed with six BGO (AC) HPGe detectors and one intrinsic Ge planar detector. Eleven new transitions and three new iso-mers at 2089, 2357 and 1968 + Δ keV with T_ (1/2) = 19, 34 ± 4, 9, 53, 4 ± 20. 5 and 18. 04 ± 3. 1 ns, respectively, were observed, and a level scheme established. In addition, a half-life of 36.7 ± 7.0 ns was determined for the first time for the previously established 2065 keV isomer.
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