Highly deformed rotational structures in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>136</mn></mrow></msup></mrow><mi mathvariant="normal">Pm</mi></math></span>

J. Pfohl; R. W. Laird; M. A. Riley; F. G. Kondev; D. E. Archer; T. B. Brown; R. M. Clark; M. Devlin; P. Fallon; D. J. Hartley; I. M. Hibbert; D. T. Joss; D. R. LaFosse; P. J. Nolan; N. J. O’Brien; E. S. Paul; D. G. Sarantites; R. K. Sheline; S. L. Shepherd; J. Simpson; R. Wadsworth; Y. Sun; A. V. Afanasjev; I. Ragnarsson

doi:10.1103/PhysRevC.62.031304

Rapid Communication

Highly deformed rotational structures in $^{136} Pm$

J. Pfohl, R. W. Laird, M. A. Riley, F. G. Kondev, D. E. Archer, T. B. Brown, R. M. Clark, M. Devlin, P. Fallon, D. J. Hartley, I. M. Hibbert, D. T. Joss, D. R. LaFosse, P. J. Nolan, N. J. O’Brien, E. S. Paul, D. G. Sarantites, R. K. Sheline, S. L. Shepherd, J. Simpson, R. Wadsworth, Y. Sun, A. V. Afanasjev, and I. Ragnarsson

Phys. Rev. C 62, 031304(R) – Published 23 August 2000

Abstract

Four highly deformed structures in the odd-odd $nucleus_{61}^{136} {Pm}_{75}$ were observed via the $^{105} Pd (^{35} Cl, 2 p 2 n)$ reaction at 180 and 173 MeV using the GAMMASPHERE $γ$ -ray spectrometer and the Microball charged-particle detector array. Quadrupole moment measurements were performed on all of the bands. In contrast to lighter odd- $Z$ Pm and Pr nuclei, bands based on the $g_{9 / 2} [404] 9 / 2$ proton orbital were not observed. Instead, the four observed sequences are assigned as a coupling of an $i_{13 / 2}$ neutron with the low- $Ω$ $h_{11 / 2}$ and mixed $d_{5 / 2} g_{7 / 2}$ orbitals. Comparisons with neighboring highly deformed structures are discussed and cranked Nilsson-Strutinsky calculations for $^{136} Pm$ are presented.

Received 20 March 2000

DOI:https://doi.org/10.1103/PhysRevC.62.031304

Authors & Affiliations

J. Pfohl^1,*, R. W. Laird¹, M. A. Riley¹, F. G. Kondev^1,†, D. E. Archer^1,‡, T. B. Brown^1,§, R. M. Clark², M. Devlin^3,∥, P. Fallon², D. J. Hartley^1,7, I. M. Hibbert^4,¶, D. T. Joss^5,**, D. R. LaFosse^3,††, P. J. Nolan⁵, N. J. O’Brien⁴, E. S. Paul⁵, D. G. Sarantites³, R. K. Sheline¹, S. L. Shepherd⁵, J. Simpson⁶, R. Wadsworth⁴, Y. Sun⁷, A. V. Afanasjev⁸, and I. Ragnarsson⁸

¹Department of Physics, Florida State University, Tallahassee, Florida 32306
²Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
³Department of Chemistry, Washington University, St. Louis, Missouri 63130
⁴Department of Physics, University of York, Heslington, York Y01 5DD, United Kingdom
⁵Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
⁶CLRC, Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
⁷Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996
⁸Department of Mathematical Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund, Sweden

^*Present address: Sandia National Laboratories, Albuquerque, NM 87185.
^†Present address: Physics Division, Argonne National Laboratory, Argonne, IL 60439.
^‡Present address: Lawrence Livermore National Laboratory, Livermore, CA 94550.
^§Present address: Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506.
^∥Present address: Los Alamos National Laboratory, Los Alamos, NM 87545.
^¶Present address: Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 3BX, U.K.
^**Present address: School of Sciences, Staffordshire University, Stoke on Trent ST4 2DE, U.K.
^††Present address: Department of Physics, SUNY Stony Brook, Stony Brook, NY 11794.

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Vol. 62, Iss. 3 — September 2000

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