Spin-alignment and g-factor Measurement of the I=12+ Isomer in 192Pb Produced in the Relativistic-energy Fragmentation of a 238U Beam

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Abstract

The feasibility of measuring g-factors using the TDPAD method applied to high-energy, heavy fragmentation products is explored. The 2623 keV I-pi = 12(+) isomer in Pb-192 with tau = 1.57 mu s has been produced using the fragmentation of a 1 A GeV U-238 beam. The results presented demonstrate for the first time that such heavy nuclei produced in a fragmentation reaction with a relativistic beam are sufficiently well spin-aligned. Moreover, the rather large value of the alignment, 28(10)% of the maximum possible, is preserved during the separation process allowing the determination of magnetic moments. The measured values of the lifetime, tau = 1.54(9) mu s, and the g-factor, g = -0.175(20), agree with the results of previous investigations using fusion-evaporation reactions.

Details

Authors
  • M. Kmiecik
  • A. Maj
  • J. Gerl
  • G. Neyens
  • L. Atanasova
  • D. L. Balabanski
  • F. Becker
  • P. Bednarczyk
  • G. Benzoni
  • N. Blasi
  • A. Bracco
  • S. Brambilla
  • L. Caceres
  • F. Camera
  • M. Ciemala
  • F. C. L. Crespi
  • S. K. Chamoli
  • S. Chmel
  • J. M. Daugas
  • P. Detistov
  • P. Doornenbal
  • G. Georgiev
  • K. Gladnishki
  • M. Gorska
  • H. Grawe
  • J. Grebosz
  • M. Hass
  • Robert Hoischen
  • G. Ilie
  • M. Ionescu-Bujor
  • J. Jolie
  • I. Kojuharov
  • A. Krasznahorkay
  • R. Kulessa
  • M. Lach
  • S. Lakshmi
  • S. Leoni
  • G. Lo Bianco
  • R. Lozeva
  • K. H. Maier
  • S. Mallion
  • K. Mazurek
  • W. Meczynski
  • B. Million
  • D. Montanari
  • S. Myalski
  • C. Petrache
  • M. Pfuetzner
  • S. Pietri
  • Zs. Podolyak
  • W. Prokopowicz
  • N. Saito
  • T. R. Saito
  • A. Saltarelli
  • G. S. Simpson
  • J. Styczen
  • N. Vermeulen
  • E. Werner-Malento
  • O. Wieland
  • H. J. Wollersheim
  • M. Zieblinski
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)153-158
JournalEuropean Physical Journal A. Hadrons and Nuclei
Volume45
Issue number2
Publication statusPublished - 2010
Publication categoryResearch
Peer-reviewedYes