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  • Evidence for Thermal Equilibration in Multifragmentation Reactions probed with Bremsstrahlung Photons
    d'Enterria, D G; Aphecetche, L; Chbihi, A; Delagrange, H; Díaz, J; van Goethem, M J; Hoefman, M; Kugler, A; Löhner, H; Martínez, G; Mora, M J; Ortega, R; Ostendorf, R; Schadmand, S; Schutz, Y; Siemssen, R H; Stracener, D; Tlusty, P; Turrisi, R; Volkerts, M; Wagner, V; Wilschut, H; Yahlali, N

    arXiv.org, 06/2001
    Paper

    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.

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