Elsevier

Nuclear Physics A

Volume 695, Issues 1–4, 3 December 2001, Pages 3-50
Nuclear Physics A

General properties of the πh9/2[541]1/2 configuration and level scheme of 165Tm

https://doi.org/10.1016/S0375-9474(01)01111-3Get rights and content

Abstract

165Tm has been studied through the reactions 150Nd(19F, 4n), Ebeam=85 MeV and 154Sm (15N, 4n), Ebeam=70 MeV. The level scheme has been extended to spin 71/2ℏ, and four new bands have been added. Two are assigned to the K=17/2, three-quasiparticle configurations, π[523]7/2ν[642]5/2+ν[523]5/2 and π[404]7/2+ν[642]5/2+ν[523]5/2, and the remaining two are assigned to γ-vibrations coupled to an h9/2 proton. Lifetimes of high-spin states in the [541]1/2 and [411]1/2+ bands have been measured using DSAM techniques, allowing transition quadrupole moments to be deduced. Furthermore, crossings between the [541]1/2 and [523]7/2 bands and between the [411]1/2+ and [404]7/2+ bands are analysed with a band-mixing calculation to obtain the quadrupole moments of the [523]7/2 and [404]7/2+ bands. While the [523]7/2, [411]1/2+ and [404]7/2+ bands all have similar deformations, the [541]1/2 band has a quadrupole moment approximately 15% larger. The relative deformations are in good agreement with diabatic potential energy surface calculations performed using the code “Ultimate Cranker”. The experimental crossing frequency, due to the alignment of i13/2 neutrons, is found to be delayed in the [541]1/2 band compared to the other bands. This is a universal feature in the rare-earth region, and extensive systematic Cranked Shell Model calculations have been performed to predict deformations and crossing frequencies for nuclei in the region. The model is unable to reproduce the full delay in crossing frequency, confirming that deformation alone is not responsible for the shift.

References (104)

  • R. Bengtsson et al.

    Nucl. Phys. A

    (1979)

    Nucl. Phys. A

    (1979)
  • W. Satula et al.

    Nucl. Phys. A

    (1993)
  • C.-H. Yu et al.

    Nucl. Phys. A

    (1990)
  • R.A. Bark et al.

    Nucl. Phys. A

    (1998)
  • S. Ogaza et al.

    Nucl. Phys. A

    (1993)
  • J. Gascon et al.

    Nucl. Phys. A

    (1990)
  • S.J. Warburton et al.

    Nucl. Phys. A

    (1995)
  • D.C. Radford

    Nucl. Instrum. Methods A

    (1995)
  • G. Palameta et al.

    Nucl. Instrum. Methods A

    (1985)
  • T. Yamazaki

    Nucl. Data A

    (1967)
  • K.S. Krane et al.

    Nucl. Data Tables

    (1973)
  • J. Gizon et al.

    Nucl. Phys. A

    (1972)
  • W.M. Currie

    Nucl. Instrum. Methods

    (1969)
  • S.H. Sie et al.

    Nucl. Phys. A

    (1977)
  • J.F. Ziegler et al.

    At. Data Nucl. Data Tables

    (1974)
  • C.A. Fields et al.

    Nucl. Phys. A

    (1984)
  • F. Dönau

    Nucl. Phys. A

    (1987)
  • S. Olbrich et al.

    Nucl. Phys. A

    (1980)
  • R.A. Bark et al.

    Nucl. Phys. A

    (1995)
  • R. Bengtsson et al.

    At. Data Nucl. Data Tables

    (1986)
  • W. Nazarewicz et al.

    Nucl. Phys. A

    (1990)
  • T. Bengtsson

    Nucl. Phys. A

    (1989)
  • R. Bengtsson et al.

    Nucl. Phys. A

    (1994)
  • R.A. Bark et al.

    Phys. Rev. Lett. B

    (1994)
  • D. Müller et al.

    Phys. Lett. B

    (1994)
  • D.C. Radford et al.

    Nucl. Phys. A

    (1992)
  • R.G. Helmer

    Nucl. Data Sheets

    (1991)
  • A.G. Smith et al.

    Nucl. Phys. A

    (1995)
  • J.N. Mo

    Nucl. Phys. A

    (1987)
  • S. Jónsson et al.

    Nucl. Phys. A

    (1986)
  • J.C. Bacelar et al.

    Nucl. Phys. A

    (1985)
  • P.M. Walker

    Nucl. Phys. A

    (1981)
  • P. Frandsen et al.

    Nucl. Phys. A

    (1988)
  • R.A. Bark et al.

    Nucl. Phys. A

    (1998)
  • J.C. Lisle et al.

    Nucl. Phys. A

    (1981)
  • B. Singh

    Nucl. Data Sheets

    (1995)
  • E. Browne

    Nucl. Data Sheets

    (1990)
  • S.G. Li et al.

    Nucl. Phys. A

    (1993)
  • J.C. Bacelar et al.

    Nucl. Phys. A

    (1985)
  • M.A. Riley

    Z. Phys. A

    (1993)
  • G.D. Dracoulis

    Nucl. Phys. A

    (1983)
  • J. Recht

    Nucl. Phys. A

    (1985)
  • G.D. Dracoulis

    J. Phys. G

    (1978)
  • E. Browne

    Nucl. Data Sheets

    (1987)
  • R.A. Bark et al.

    Nucl. Phys. A

    (1989)
  • L. Hildingsson et al.

    Nucl. Phys. A

    (1990)
  • T. Kibédi et al.

    Nucl. Phys. A

    (1992)
  • Ts. Venkova et al.

    Z. Phys. A

    (1989)
  • S. Juutinen

    Nucl. Phys. A

    (1991)
  • B. Cederwall et al.

    Phys. Rev. C

    (1991)
  • Cited by (44)

    View all citing articles on Scopus
    1

    Present address: Cyclotron and PET unit, Copenhagen University Hospital, Copenhagen, Denmark.

    2

    Present address: Washington University, Chemistry Department, St. Louis, MO 63130, USA.

    3

    Present address: Japan Atomic Energy Institute, Ibaraki 319-1195, Japan.

    View full text