Search for the terminating ${27}^{\ensuremath{-}}$ state in $^{140}\mathrm{Nd}$

Search for the terminating $27^{-}$ state in ${}^{140}{Nd}$

C. M. Petrache, I. Ragnarsson, H. Naïdja, F. Nowacki, R. Leguillon, T. Zerrouki, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, and J. Uusitalo

Phys. Rev. C 92, 034314 – Published 14 September 2015

Abstract

In the search for the fully aligned $27^{-}$ state in ${}^{140}{Nd}$ predicted by cranked Nilsson-Strutinsky calculations, new close-to-spherical high-spin states have been discovered. Both the close-to-spherical and the triaxial calculated states are in good agreement with the experimental results, supporting the existence of shape coexistence up to very high spins. Shell-model calculations using a newly developed effective interaction for the $50 \leq N, Z \leq 82$ mass region are in good agreement with the observed spherical states. The comparison between the experimental and calculated level energies allowed the relative energy to be established between several proton and neutron orbitals at high energy and spins.

Received 1 March 2015
Revised 13 August 2015

DOI:https://doi.org/10.1103/PhysRevC.92.034314

Authors & Affiliations

C. M. Petrache¹, I. Ragnarsson², H. Naïdja^3,4,5, F. Nowacki³, R. Leguillon^1,6, T. Zerrouki⁷, P. T. Greenlees⁷, U. Jakobsson^7,8, P. Jones^7,9, R. Julin⁷, S. Juutinen⁷, S. Ketelhut⁷, M. Leino⁷, M. Nyman^7,10, P. Peura⁷, P. Rahkila⁷, P. Ruotsalainen^7,11, J. Saren⁷, C. Scholey⁷, J. Sorri⁷, and J. Uusitalo⁷

¹Centre de Sciences Nucléaires et de Sciences de la Matière, Université Paris-Sud and CNRS/IN2P3, 91405 Orsay, France
²Division of Mathematical Physics, LTH, Lund University, Post Office Box 118, SE-221 00 Lund, Sweden
³Universitè de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France, and CNRS, UMR7178, 67037 Strasbourg, France
⁴GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
⁵Université Constantine 1, Route Ain-El bey, 25000 Constantine, Algérie
⁶Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai, Ibaraki 319-1195, Japan
⁷Department of Physics, University of Jyväskylä, Jyväskylä FIN-40014, Finland
⁸Department of Physics, Royal Institute of Technology (KTH), Alba Nova University Center, SE-10691 Stockholm, Sweden
⁹Department of Nuclear Physics, iThemba Laboratory for Accelerator Based Sciences, Post Office Box 722, Somerset West 7129, South Africa
¹⁰Institute for Reference Materials and Measurements (IRMM), 2440 Geel, Belgium
¹¹TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3

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Vol. 92, Iss. 3 — September 2015

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Physical Review C

covering nuclear physics

Search for the terminating $27^{-}$ state in ${}^{140}{Nd}$

C. M. Petrache, I. Ragnarsson, H. Naïdja, F. Nowacki, R. Leguillon, T. Zerrouki, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, and J. Uusitalo

Phys. Rev. C 92, 034314 – Published 14 September 2015

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

Search for the terminating 27− state in Nd140

C. M. Petrache, I. Ragnarsson, H. Naïdja, F. Nowacki, R. Leguillon, T. Zerrouki, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, and J. Uusitalo

Phys. Rev. C 92, 034314 – Published 14 September 2015

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Search for the terminating $27^{-}$ state in ${}^{140}{Nd}$