Study of Collective Rotational Bands in <SUP>179</SUP>Pt

XU Yan-Bing; ZHOU Xiao-Hong; SONG Li-Tao; GUO Ying-Xiang; SUN Zhi-Yu

Chinese Physics C> 2004, Vol. 28> Issue(6) : 584-587

Study of Collective Rotational Bands in ¹⁷⁹Pt

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000, China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan3 Chiba Institute of Technology, Narashino,Chiba 275-0023,Japan

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Abstract：
High-spin states in ¹⁷⁹Pt have been studied experimentally using the ¹⁴⁹Sm(³⁵Cl, p4n) fusion-evaporation reaction at beam energies of 164—180MeV. Measurements of γ-ray excitation function, X-γ coincidences and γ-γ-t coincidences were carried out with 13 BGO(AC) HPGe and 3 LOAX detectors. Based on the measured results, three rotational bands built on intrinsic states assigned to the 1/2^－[521], 5/2^－[512] and 7/2⁺[633] Nilsson configurations have been established for ¹⁷⁹Pt. It has been observed that the aligned angular moment in the 1/2^－[521] band increases suddenly around hω=0.27MeV. The big signature splitting has been observed in the 7/2⁺[633] band. These phenomena are discussed by referring to the systematics of the level structure in the Pt isotopes and isotones of ¹⁷⁹Pt.

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XU Yan-Bing, ZHOU Xiao-Hong, SONG Li-Tao, GUO Ying-Xiang and SUN Zhi-Yu. Study of Collective Rotational Bands in ¹⁷⁹Pt[J]. Chinese Physics C, 2004, 28(6): 584-587.

XU Yan-Bing, ZHOU Xiao-Hong, SONG Li-Tao, GUO Ying-Xiang and SUN Zhi-Yu. Study of Collective Rotational Bands in ¹⁷⁹Pt[J]. Chinese Physics C, 2004, 28(6): 584-587. shu

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Received: 2003-09-23
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Collective Rotational Bands in ¹⁷⁹Pt

Corresponding author: ZHOU Xiao-Hong,

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000, China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan3 Chiba Institute of Technology, Narashino,Chiba 275-0023,Japan

Received Date: 2003-09-23
Accepted Date: 1900-01-01
Available Online: 2004-06-05

Abstract: High-spin states in ¹⁷⁹Pt have been studied experimentally using the ¹⁴⁹Sm(³⁵Cl, p4n) fusion-evaporation reaction at beam energies of 164—180MeV. Measurements of γ-ray excitation function, X-γ coincidences and γ-γ-t coincidences were carried out with 13 BGO(AC) HPGe and 3 LOAX detectors. Based on the measured results, three rotational bands built on intrinsic states assigned to the 1/2^－[521], 5/2^－[512] and 7/2⁺[633] Nilsson configurations have been established for ¹⁷⁹Pt. It has been observed that the aligned angular moment in the 1/2^－[521] band increases suddenly around hω=0.27MeV. The big signature splitting has been observed in the 7/2⁺[633] band. These phenomena are discussed by referring to the systematics of the level structure in the Pt isotopes and isotones of ¹⁷⁹Pt.