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24 April 2024

» arxiv » nucl-ex/0508032

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Constraints on the time-scale of nuclear breakup from thermal hard-photon emission
R. Ortega ; D. d’Enterria ; G. Martinez ; D. Baiborodin ; H. Delagrange ; J. Diaz ; F. Fernandez ; H. Loehner ; T. Matulewicz ; R.W. Ostendorf ; S. Schadmand ; Y. Schutz ; P. Tlusty ; R. Turrisi ; V. Wagner ; H.W. Wilschut ; N. Yahlali ;
Date:	26 Aug 2005
Subject:	nucl-ex
Abstract:	Measured hard photon multiplicities from second-chance nucleon-nucleon collisions are used in combination with a kinetic thermal model, to estimate the break-up times of excited nuclear systems produced in nucleus-nucleus reactions at intermediate energies. The obtained nuclear break-up time for the $^{129}${Xe} + $^{nat}${Sn} reaction at 50{it A} MeV is $Delta$$ au$ $approx$ 100 -- 300 fm/$c$ for all reaction centralities. The lifetime of the radiating sources produced in seven other different heavy-ion reactions studied by the TAPS experiment are consistent with $Delta$$ au$ $approx$ 100 fm/$c$, such relatively long thermal photon emission times do not support the interpretation of nuclear breakup as due to a fast spinodal process for the heavy nuclear systems studied.
Source:	arXiv, nucl-ex/0508032
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