Structures of Po201 and Rn205 from EC/β+-decay studies

A. Y. Deo, Zs. Podolyák, P. M. Walker, A. Algora, B. Rubio, J. Agramunt, L. M. Fraile, N. Al-Dahan, N. Alkhomashi, J. A. Briz, E. Estevez, G. Farrelly, W. Gelletly, A. Herlert, U. Köster, A. Maira, and S. Singla
Phys. Rev. C 81, 024322 – Published 24 February 2010

Abstract

Several low-lying excited states in 86205Rn119 and 84201Po117 were identified for the first time following EC/β+ decay of Fr205 and At201, respectively, using γ-ray and conversion electron spectroscopy at the CERN isotope separator on-line (ISOLDE) facility. The EC/β+ branch from Fr205 was measured to be 1.5(2)%. The excited states of the daughter nuclei are understood in terms of the odd nucleon coupling to the neighboring even-even core. The neutron single-particle energies of the p3/2 orbital relative to the f5/2 ground state in Rn205, and the f5/2 orbital relative to the p3/2 ground state in Po201, were determined to be 31.4(2) and 5.7(3) keV, respectively. We tentatively identify a 132+ isomeric level at 657.1(5) keV in Rn205. The systematic behavior of the 132+ and 32 levels is also discussed.

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  • Received 9 December 2009

DOI:https://doi.org/10.1103/PhysRevC.81.024322

©2010 American Physical Society

Authors & Affiliations

A. Y. Deo1,*, Zs. Podolyák1, P. M. Walker1, A. Algora2,3, B. Rubio2, J. Agramunt2, L. M. Fraile4, N. Al-Dahan1,5, N. Alkhomashi1,6, J. A. Briz7, E. Estevez2, G. Farrelly1, W. Gelletly1, A. Herlert8, U. Köster9, A. Maira7, and S. Singla10

  • 1Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
  • 2IFIC, CSIC - Universidad de Valencia, E-46071, Spain
  • 3Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, H-4001, Hungary
  • 4Grupo de Física Nuclear, Facultad CC. Físicas, Universidad Complutense, E-28040 Madrid, Spain
  • 5Department of Physics, University of Kerbala, Kerbala, Iraq
  • 6KACST, P.O. Box 6086, Riyadh 11442, Saudi Arabia
  • 7Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
  • 8ISOLDE, PH Department, CERN, CH-1211 Geneva, Switzerland
  • 9Institut Laue Langevin, 6 rue Jules Horowitz, F-38042 Grenoble Cedex 9, France
  • 10Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110 016, India

  • *A.Deo@surrey.ac.uk

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Vol. 81, Iss. 2 — February 2010

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