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Thermal Bremsstrahlung photons probing the nuclear caloric curve

D. G. d'Enterria·G. Martínez·L. Aphecetche·H. Delagrange·F. Fernández·H. Löhner·R. Ortega·R. W. Ostendorf·Y. Schutz·H. W. Wilschut
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Abstract

Hard-photon (E$_γ>$ 30 MeV) emission from second-chance nucleon-nucleon Bremsstrahlung collisions in intermediate energy heavy-ion reactions is studied employing a realistic thermal model. Photon spectra and yields measured in several nucleus-nucleus reactions are consistent with an emission from hot nuclear systems with temperatures $T\approx$ 4 - 7 MeV. The corresponding caloric curve in the region of excitation energies $ε^\star\approx$ 3{\it A} - 8{\it A} MeV shows lower values of $T$ than those expected for a Fermi fluid.

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D. G. d'Enterria, G. Martínez, L. Aphecetche, H. Delagrange, F. Fernández, H. Löhner, R. Ortega, R. W. Ostendorf, Y. Schutz, H. W. Wilschut. 2002-05-17. Thermal Bremsstrahlung photons probing the nuclear caloric curve. https://doi.org/10.1016/s0370-2693(02)01973-1

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