Impact factor of Chinese Physics C is 3.6 in 2023 Impact factor of Chinese Physics C is 3.6 in 2022 2021 Impact Factor 2.944
Advanced Search
Chinese Physics C> 2000, Vol. 24> Issue(12) : 1123-1130 

Signature Inversion in the Rotational Bands of Odd-Odd 178Ir

  •  Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319- 1195,Japan3 Chiba University, Inage-ku, Chiba 263-8512,Japan4 Chiba Institute of Technology, Narashino, Chiba 275-0023,Japan5 Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan

  • High-spin states in 178Ir have been produced and studied via the 152Sm(30p,5nγ)178Ir reaction. In-beam γ rays were measured including the excitation functions at 150,155,160,165 and 170 MeV beam energies,K X-γ and γ-γ coincidences at 160 MeV. According to the band structure characteristics and the deduced intra-band B (M1)/B (E2) ratios, two rotational bands are identified for the first time and assigned to be associated with the πh9/2νi13/2 and the πh11/2νi13/2 quasiparticle configurations respectively. Low-spin signature inversion in bob bands has been confirmed hased on the observation of signature crossing at Ic=21h for the πh9/2νi13/2, semidecoupled band and at Ic=16 h for the πh11/2νi13/2 strongly coupled band, respectively. Systematics of the signature inversion has been discussed for the semidecoupled bands in the A=160-180 mass region and some regularities are proposed concerning the crossing spins with variation of mass. The signature splitting in the πh11/2νi13/2 band of 178Ir is smaller than that in the similar band of 176Re; this trend is opposite to the predictions based on the projected shell model.
  • 加载中

  • References

    [1] Jain A K,Sheline R K,Sood P C et al. Rev of Mod Phys., 1990,62: 393–509 2 Bengtsson R, Frisk R H, May R F et al. Nucl. Phys., 1984, A415: 189–214 3 ZHANG Y H, ZHAO Q Z, ZHOU X H et al. High Energy Physics and Nuclear Physics, 1997,21: 15–23 4 Bark R A, Espino J M,Reviol W et al. Phys. Lett., 1997,B406: 193–199 5 Cardona M A,Kreiner A J, Hojman D et al. Phys. Rev., 1999,C59: 1298–1315 6 ZHANG Y H,ZHANG S Q,ZHAO Q Z et al. Phys. Rev., 1999,C60:044311 – 1–44311– 12 7 Bark R A,Carlsson, Freeman S J et al. Nucl. Phys., 1998,A630:603–6308 ZHANG Y H,Hayakawa T,Oshima M et al. Eur. Phys. J., 1999,A5:345–349 9 Firestone R B,Shirley V S,Baglin C M et al. Table of Isotopes, 1996,2:2139 10 Dracoulis G D, Fabricius B, Kibeti T et al. Nucl. Phys., 1991,A534: 173 11 JIN H Q, Riedinger L L,Bingharn C R et al. Phys. Rev., 1996,C53:2106–212512 Dracoulis G D,Walker P M,Johnson A. J. Phys., 1978,G4: 713–741 13 WEN S X,ZHENG H, LI S G et al. Phys. Rev., 1996,C54: 1015–1026 14 Kreiner A J, Nucl. Phys., 1990,A520:225–239c15 Bohr A, Mottelson B R. Nuclear Structure. Massachusetts: W. A. BENJAMIN, INC., 1975, 2: 44–58 16 Hara K. Nucl. Phys., 1993,A557:449–458c

  • Access

    加载中

Get Citation
ZHANG YuHu. Signature Inversion in the Rotational Bands of Odd-Odd 178Ir[J]. Chinese Physics C, 2000, 24(12): 1123-1130.
ZHANG YuHu. Signature Inversion in the Rotational Bands of Odd-Odd 178Ir[J]. Chinese Physics C, 2000, 24(12): 1123-1130. shu
Milestone
Received: 1999-12-02
Revised: 1900-01-01
Article Metric

Article Views(1810)
PDF Downloads(653)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Signature Inversion in the Rotational Bands of Odd-Odd 178Ir

    Corresponding author: ZHANG YuHu,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319- 1195,Japan3 Chiba University, Inage-ku, Chiba 263-8512,Japan4 Chiba Institute of Technology, Narashino, Chiba 275-0023,Japan5 Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan
  • Received Date: 1999-12-02
  • Accepted Date: 1900-01-01
  • Available Online: 2000-12-05

Abstract: High-spin states in 178Ir have been produced and studied via the 152Sm(30p,5nγ)178Ir reaction. In-beam γ rays were measured including the excitation functions at 150,155,160,165 and 170 MeV beam energies,K X-γ and γ-γ coincidences at 160 MeV. According to the band structure characteristics and the deduced intra-band B (M1)/B (E2) ratios, two rotational bands are identified for the first time and assigned to be associated with the πh9/2νi13/2 and the πh11/2νi13/2 quasiparticle configurations respectively. Low-spin signature inversion in bob bands has been confirmed hased on the observation of signature crossing at Ic=21h for the πh9/2νi13/2, semidecoupled band and at Ic=16 h for the πh11/2νi13/2 strongly coupled band, respectively. Systematics of the signature inversion has been discussed for the semidecoupled bands in the A=160-180 mass region and some regularities are proposed concerning the crossing spins with variation of mass. The signature splitting in the πh11/2νi13/2 band of 178Ir is smaller than that in the similar band of 176Re; this trend is opposite to the predictions based on the projected shell model.

    HTML

Reference (1)

目录

Link
IOPScience
SCOAP3
arXiv
Chinese Physical Society
Journal information
Introduction
Editorial Board
Others
Subscribe
Contact us
QQ: 1307685413
Tel: +86-010-88235947
Fax: +86-010-88233126
E-mail: cpc@ihep.ac.cn

  • CPC Website

  • IOP Website

  • CPC WeChat

Copyright © Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 京ICP备05002789号-1

Supported by: Beijing Renhe Information Technology Co. Ltd  E-mail: info@rhhz.net

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return