Superdeformed band at very high spin in $^{140}\mathrm{Nd}$

Superdeformed band at very high spin in ${}^{140}{Nd}$

A. Neußer, H. Hübel, A. Al-Khatib, P. Bringel, A. Bürger, N. Nenoff, G. Schönwaßer, A. K. Singh, C. M. Petrache, G. Lo Bianco, I. Ragnarsson, G. B. Hagemann, B. Herskind, D. R. Jensen, G. Sletten, P. Fallon, A. Görgen, P. Bednarczyk, D. Curien, G. Gangopadhyay, A. Korichi, A. Lopez-Martens, B. V. T. Rao, T. S. Reddy, and Nirmal Singh

Phys. Rev. C 70, 064315 – Published 16 December 2004

Abstract

A new high-spin superdeformed band has been discovered in ${}_{60}^{140}{Nd}_{80}$ . It was populated in the ${}^{96}{Zr} ({}^{48}{Ca}, 4 n)$ reaction and investigated using the EUROBALL $γ$ -ray spectrometer array. The band is observed in the approximate spin range of $I = 36$ to 66. It is associated with shell gaps around $Z = 60$ and at $N = 80$ at large deformation. These gaps produce a pronounced minimum in the calculated total Routhian surfaces at a quadrupole deformation of $ϵ_{2} = 0.45$ . The new band which lies between the high-deformation bands in the $A \approx 130$ region and the superdeformed bands in $A \approx 150$ nuclei provides insight into the development of the deformation between these two regions. Two possible configurations are suggested involving four neutrons of $i_{13 ∕ 2}$ origin $(ν 6^{4})$ and either six protons of $h_{11 ∕ 2} ∕ h_{9 ∕ 2}$ origin $(π 5^{6})$ or five protons of $h_{11 ∕ 2} ∕ h_{9 ∕ 2}$ and one of $i_{13 ∕ 2}$ origin $(π 5^{5} 6^{1})$ .

Received 11 August 2004

DOI:https://doi.org/10.1103/PhysRevC.70.064315

Authors & Affiliations

A. Neußer, H. Hübel, A. Al-Khatib, P. Bringel, A. Bürger, N. Nenoff, G. Schönwaßer, and A. K. Singh^*

Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nußallee 14-16, D-53115 Bonn, Germany

C. M. Petrache and G. Lo Bianco

Dipartimento di Fisica, Università di Camerino and INFN, Sez. Perugia, I-62032, Camerino, Italy

I. Ragnarsson

Department of Mathematical Physics, Lund Institute of Technology, S-22362 Lund, Sweden

G. B. Hagemann, B. Herskind, D. R. Jensen, and G. Sletten

Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

P. Fallon and A. Görgen^†

Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

P. Bednarczyk^‡ and D. Curien

Institut de Recherches Subatomiques, 23 Rue du Loess, F-67037 Strasbourg, France

G. Gangopadhyay

Department of Physics, University College of Science, 92 A.P.C. Road, Kolkata 700009, India

A. Korichi and A. Lopez-Martens

Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, F-91405 Orsay Campus, France

B. V. T. Rao and T. S. Reddy

Department of Nuclear Physics, Andhra University, Visakhapatnam 530003, India

Nirmal Singh

Department of Physics, Panjab University, Chandigarh 160014, India

^*Present address: Department of Physics, IIT Kharagpur, Kharagpur-721302, India.
^†Present address: DAPNIA∕SPhN, CEA Saclay, F-91191 Gif-sur-Yvette, France.
^‡Present address: Gesellschaft für Schwerionenforschung, Planckstr. 1, D-64291 Darmstadt, Germany.

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Vol. 70, Iss. 6 — December 2004

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Physical Review C

covering nuclear physics

Superdeformed band at very high spin in ${}^{140}{Nd}$

Phys. Rev. C 70, 064315 – Published 16 December 2004

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

Superdeformed band at very high spin in Nd140

Phys. Rev. C 70, 064315 – Published 16 December 2004

Abstract

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Superdeformed band at very high spin in ${}^{140}{Nd}$