Intruder States and the Onset of Deformation in the Neutron-Deficient Even-Even Polonium Isotopes

N. Bijnens, P. Decrock, S. Franchoo, M. Gaelens, M. Huyse, H. -Y. Hwang, I. Reusen, J. Szerypo, J. von Schwarzenberg, J. Wauters, J. G. Correia, A. Jokinen, and P. Van Duppen
Phys. Rev. Lett. 75, 4571 – Published 18 December 1995
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Abstract

Alpha- and beta-decay studies of mass-separated Rn and At nuclei reveal the existence of a low-lying 0+ state in Po196,198,200,202. The excited 0+ states are interpreted as proton-pair excitations across the Z=82 shell gap leading to a deformed state, coexisting with the spherical ground state. It is shown that with decreasing neutron number the deformed configuration intrudes to lower excitation energy, increasingly mixing into the ground state.

  • Received 28 April 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.4571

©1995 American Physical Society

Authors & Affiliations

N. Bijnens, P. Decrock, S. Franchoo, M. Gaelens, M. Huyse, H. -Y. Hwang*, I. Reusen, J. Szerypo, J. von Schwarzenberg, and J. Wauters

  • Instituut voor Kern- en Stralingsfysika, KULeuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

J. G. Correia, A. Jokinen, and P. Van Duppen

  • CERN, CH-1211 Geneva 23, Switzerland

  • *Present address: Mokwon University, 24 Mok Dong, Chung-Ku, Taejon, 301-729 Korea.
  • Present address: Warsaw University, Institute of Experimental Physics, Hoza 69, 00681 Warsaw, Poland.
  • Present address: University of Notre Dame, Notre Dame, IN 46556.

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Vol. 75, Iss. 25 — 18 December 1995

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