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E. Ideguchi; D. G. Sarantites; W. Reviol; A. V. Afanasjev; M. Devlin; C. Baktash; R. V. F. Janssens; D. Rudolph; A. Axelsson; M. P. Carpenter; A. Galindo-Uribarri; D. R. LaFosse; T. Lauritsen; F. Lerma; C. J. Lister; P. Reiter; D. Seweryniak; M. Weiszflog; J. N. Wilson

doi:10.1103/PhysRevLett.87.222501

Superdeformation in the Doubly Magic Nucleus ${}_{20}^{40}C a_{20}$

E. Ideguchi, D. G. Sarantites, W. Reviol, A. V. Afanasjev, M. Devlin, C. Baktash, R. V. F. Janssens, D. Rudolph, A. Axelsson, M. P. Carpenter, A. Galindo-Uribarri, D. R. LaFosse, T. Lauritsen, F. Lerma, C. J. Lister, P. Reiter, D. Seweryniak, M. Weiszflog, and J. N. Wilson

Phys. Rev. Lett. 87, 222501 – Published 8 November 2001

Abstract

A rotational band with seven $γ$ -ray transitions between states with spin $2 ħ$ and $16 ħ$ has been observed in the doubly magic, self-conjugate nucleus $_{20}^{40} {Ca}_{20}$ . The measured transition quadrupole moment of ${1.80}_{- 0.29}^{+ 0.39} e b$ indicates a superdeformed shape with a deformation $β_{2} {= 0.59}_{- 0.07}^{+ 0.11}$ . The features of this band are explained by cranked relativistic mean field calculations to arise from an 8-particle 8-hole excitation.

Received 23 July 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.222501

Authors & Affiliations

E. Ideguchi¹, D. G. Sarantites¹, W. Reviol¹, A. V. Afanasjev^2,3,4, M. Devlin^1,*, C. Baktash⁵, R. V. F. Janssens², D. Rudolph⁶, A. Axelsson⁷, M. P. Carpenter², A. Galindo-Uribarri⁵, D. R. LaFosse⁸, T. Lauritsen², F. Lerma¹, C. J. Lister², P. Reiter², D. Seweryniak², M. Weiszflog⁷, and J. N. Wilson^1,†

¹Chemistry Department, Washington University, St. Louis, Missouri 63130
²Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
³Physics Department, University of Notre Dame, Indiana 46556-5670
⁴Laboratory of Radiation Physics, University of Latvia, LV2169, Miera str. 31, Latvia
⁵Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6371
⁶Department of Physics, Lund University, S-22100 Lund, Sweden
⁷The Svedberg Laboratory and Department of Radiation Science, Uppsala University, S-75121 Uppsala, Sweden
⁸Department of Physics and Astronomy, SUNY-Stony Brook, New York 11794

^*Present address: LANSCE-3, Los Alamos National Laboratory, Los Alamos, New Mexico 87545.
^†Present address: NBI, Copenhagen, Denmark.