Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2000-12-23
Phys.Rev.Lett.87:022701,2001
Physics
Nuclear Physics
Nuclear Experiment
Revised version, accepted for publication in Physical Review Letters. 4 pages, 4 figs
Scientific paper
10.1103/PhysRevLett.87.022701
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.
Aphecetche L.
Chbihi Abdelahad
d'Enterria David G.
Delagrange H.
Diaz Jaqueline
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