alpha decay of the new isotopes Rn-193,Rn-194

A. N. Andreyev*, S. Antalic, M. Huyse, P. Van Duppen, D. Ackermann, L. Bianco, D. M. Cullen, I. G. Darby, S. Franchoo, S. Heinz, F. P. Hessberger, S. Hofmann, I. Kojouharov, B. Kindler, A. -P. Leppanen, B. Lommel, R. Mann, G. Muenzenberg, J. Pakarinen, R. D. PageJ. J. Ressler, S. Saro, B. Streicher, B. Sulignano, J. Thomson, R. Wyss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The new neutron-deficient isotopes Rn-193,Rn-194 have been identified in the complete fusion reaction Cr-52+Sm-144 -> Rn-196(*) at the velocity filter SHIP. The alpha-decay energy and half-life value of Rn-194 were determined to be E-alpha=7700(10) keV and T-1/2=0.78(16) ms, respectively. For Rn-193 the half-life of T-1/2=1.15(27) ms and two alpha lines at E-alpha 1=7685(15) keV, I-alpha 1=74(20)% and E-alpha 2=7875(20) keV, I-alpha 2=26(12)% were found. The decay pattern of Rn-193, which is substantially different from that of the heavier odd-A Rn isotopes, provides first experimental evidence for the long-predicted deformation in the very neutron-deficient Rn nuclei.

Original languageEnglish
Article numberARTN 064303
Number of pages6
JournalPhysical Review C
Volume74
Issue number6
DOIs
Publication statusPublished - Dec 2006

Keywords

  • INTRUDER STATES
  • GAMMA-DECAY
  • SPECTROSCOPY
  • SHIP
  • PRODUCTS
  • PO ISOTOPES
  • NUCLEI
  • PB-185

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