Neutron production in coincidence with fragments from the [sup 4]Ca+H reactions at E[sub lab]=357 and 565 A MeV

Tuva`, C.; Albergo, S.; Boemi, D.; Caccia, Z.; Chen, C.-X.; Costa, S.; Crawford, H. J.; Cronqvist, M.; Engelage, J.; Greiner, L.; Guzik, T. G.; Insolia, A.; Knott, C. N.; Lindstrom, P. J.; Mitchell, J. W.; Potenza, R.; Russo, G. V.; Soutoul, A.; Testard, O.; Tricomi, A.
April 2000
AIP Conference Proceedings;2000, Vol. 513 Issue 1, p326
Academic Journal
In the frame of the Transport Collaboration neutrons in coincidence with charged fragments produced in the [sup 40]Ca+H reaction at E[sub lab]=357 and 565 A MeV have been measured at the Heavy Ion Spectrometer System (HISS) facility of the Lawrence Berkeley National Laboratory, using the multifunctional neutron spectrometer MUFFINS. The detector covered a narrow angular range about the beam in the forward direction (0°–3.2°). In this contribution we report absolute neutron production cross sections in coincidence with charged fragments (10≤Z≤20). The neutron multiplicities have been estimated from the comparison between the neutron cross sections, in coincidence with the fragments, and the elemental cross sections. We have found evidence for a pre-equilibrium emission of prompt neutrons in superposition to a ‘slower’ deexcitation of the equilibrated remnant by emission of nucleons and fragments, as already seen in the inclusive rapidity distributions. © 2000 American Institute of Physics.


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