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《中国物理C》（英文）编辑部
2024年10月30日
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

  • 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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    [1] . Dracoulis G D, Fabricius B, Bark R A et al. Nucl. Phys. , 1990,A510: 5332. Nyberg J, Johnson A, Carpent er M P et al. Nucl. Phys. , 1990,A511: 923. De Voigt M J A, Kaczarowski R, Riezebos H J et al. Nucl. Phys. ,1990, A507: 4474. Kodev F G, Carpenter M P, Janssens R V F et al. Nucl. Phys. ,2001, A682: 4875. Dracoul is G D, Stuchbery A E, A P Byrne et al. J. Phys. , 1986,G12:L976. De Voigt M J A, Kaczarowski R, Riezebos H J et al. Nucl. Phys. ,1990, A507: 4727. Popescu D G, Waddngton J C, Cameron J A et al. Phys. Rev. , 1997,C55: 11758. Carpenter M P, Bingham C R, Courtney L H et al. Nucl. Phys. ,1990, A519: 1259. Hebbinghaus G, Kutsarova T, Gast W et al . Nucl. Phys. , 1990,A514: 22510. Le Blanc F, Lunney D, Obert J et al. Phys. Rev. , C60: 15431011. Hagberg E, Hansen P G, Hornshoj P et al. Nucl . Phys. , 1979,A318: 2912. Schrew e U J, Tidemand..Petersson P, Goudy G M et al . Phys. Lett . ,1980, 91B: 4613. Mailloux J, Etude la St ructure Nucleaire a Haut Spin du 178Pt et 179Pt ,Thesis, Univ. de Mont real, 199014. ZHANG C T, Bhattacharyya P, Daly P et al. Nucl. Phys. , 1998,A628: 38615. ZHENG Yong, ZHOU Xiao-Hong, LIU Min-Liang et al. HEP NP,2002, 26( 9) : 909(in Chinese)(郑勇,周小红,柳敏良等.高能物理与核物理,2002,26(9):909) 16. Walker P M, Dracoulis G D, Johnston A et al. J. Phys. G: Nucl .Phys. , 1978, 4( 10) : 165517. Dracoulis G D, Fahlander C, Byrne A P et al. Nucl. Phys. , 1983,A401: 49018. Varmette P G, Shidot D T, MA W C et al. Phys. Lett . , 1997, B410:10319. Frauendorf S, May F R. Phys. Lett . , 1983, B125: 245

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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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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.

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