Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2000-07-06
Nucl.Phys.A681:291-294,2001
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 3 figures, Proceedings CRIS 2000, 3rd Catania Relativistic Ion Studies, ``Phase Transitions in Strong Interactions: S
Scientific paper
10.1016/S0375-9474(00)00530-3
Inclusive and exclusive hard-photon (E$_\gamma >$ 30 MeV) production in five different heavy-ion reactions ($^{36}$Ar+$^{197}$Au, $^{107}$Ag, $^{58}$Ni, $^{12}$C at 60{\it A} MeV and $^{129}$Xe+$^{120}$Sn at 50{\it A} MeV) has been studied coupling the TAPS photon spectrometer with several charged-particle multidetectors covering more than 80% of 4$\pi$. The measured spectra, slope parameters and source velocities as well as their target-dependence, confirm the existence of thermal bremsstrahlung emission from secondary nucleon-nucleon collisions that accounts for roughly 20% of the total hard-photon yield. The thermal slopes are a direct measure of the temperature of the excited nuclear systems produced during the reaction.
Aphecetche L.
Chbihi Abdelahad
d'Enterria David G.
Delagrange H.
Diaz Jaqueline
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