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Spin-alignment and g-factor measurement of the I(pi)=12(+) isomer in (192)Pb produced in the relativistic-energy fragmentation of a (238)U beam

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 (192)Pb with tau = 1.57 mu s has been produced using the fragmentation of a 1 A GeV (238)U 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.
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http://hal.in2p3.fr/in2p3-00668268
Contributor : Christine Hadrossek <>
Submitted on : Thursday, February 9, 2012 - 2:40:17 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:40 PM

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M. Kmiecik, A. Maj, J. Gerl, G. Neyens, L. Atanasova, et al.. Spin-alignment and g-factor measurement of the I(pi)=12(+) isomer in (192)Pb produced in the relativistic-energy fragmentation of a (238)U beam. European Physical Journal A, EDP Sciences, 2010, 45, pp.153-158. ⟨10.1140/epja/i2010-11003-4⟩. ⟨in2p3-00668268⟩

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