Neutron production in coincidence with fragments from the 40Ca+H reactions at Elab=357 and 565 A MeV
C. Tuvà, Università degli Studi di Catania
S. Albergo, Università degli Studi di Catania
D. Boemi, Università degli Studi di Catania
Z. Caccia, Università degli Studi di Catania
C. X. Chen, Louisiana State University
S. Costa, Università degli Studi di Catania
H. J. Crawford, Space Sciences Laboratory at UC Berkeley
M. Cronqvist, Lawrence Berkeley National Laboratory
J. Engelage, Space Sciences Laboratory at UC Berkeley
L. Greiner, Space Sciences Laboratory at UC Berkeley
T. G. Guzik, Louisiana State University
A. Insolia, Università degli Studi di Catania
C. N. Knott, University of Minnesota Twin Cities
P. J. Lindstrom, Lawrence Berkeley National Laboratory
J. W. Mitchell, NASA Goddard Space Flight Center
R. Potenza, Università degli Studi di Catania
G. V. Russo, Università degli Studi di Catania
A. Soutoul, Département d‘Astrophysique
O. Testard, Département d‘Astrophysique
A. Tricomi, Università degli Studi di Catania
C. E. Tull, Louisiana State University
C. J. Waddington, University of Minnesota Twin Cities
W. R. Webber, The University of New Mexico
J. P. Wefel, Louisiana State University
Abstract
In the frame of the Transport Collaboration neutrons in coincidence with charged fragments produced in the 40Ca+H reaction at Elab=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.
