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Evidence for Thermal Equilibration in Multifragmentation Reactions probed with Bremsstrahlung Photons
D.G. d’Enterria ; L. Aphecetche ; A. Chbihi ; H. Delagrange ; J. D’{i}az ; M.J. van Goethem ; M. Hoefman ; A. Kugler ; H. Löhner ; G. Mart’{i}nez ; M.J. Mora ; R. Ortega ; R. Ostendorf ; S. Schadmand ; Y. Schutz ; R.H. Siemssen ; D. Stracener ; P. Tlusty ; R. Turrisi ; M. Volkerts ; V. Wagner ; H. Wilschut ; N. Yahlali ;
Date:	23 Dec 2000
Journal:	Phys.Rev.Lett. 87 (2001) 022701
Subject:	nucl-ex
Abstract:	The production of nuclear bremsstrahlung photons (E$_{gamma}>$ 30 MeV) has been studied in inclusive and exclusive measurements in four heavy-ion reactions at 60{it A} MeV. The measured photon spectra, angular distributions and multiplicities indicate that a significant part of the hard-photons are emitted in secondary nucleon-nucleon collisions from a thermally equilibrated system. The observation of the thermal component in multi-fragment $^{36}$Ar+$^{197}$Au reactions suggests that the breakup of the thermalized source produced in this system occurs on a rather long time-scale.
Source:	arXiv, nucl-ex/0012009
Other source:	[GID 268512] nucl-ex/0012009
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