Strong impact parameter dependence of pre-equilibrium particle emission in nucleus-nucleus reactions at intermediate energies

Strong impact parameter dependence of pre-equilibrium particle emission in nucleus-nucleus reactions at intermediate energies

Charged particles and fragments emitted in reactions between 40Ar at 45 and 65 MeV/u and an 27Al target have been detected in a geometry close to 4π in the center of mass. A new global variable, the average parallel velocity, has been used to sort the events as a function of the impact parameter val...

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Veröffentlicht in:Physics letters. B 1990-03, Vol.237 (2), p.187-191
Hauptverfasser: Péter, J., Sullivan, J.P., Cussol, D., Bizard, G., Brou, R., Louvel, M., Patry, J.P., Regimbart, R., Steckmeyer, J.C., Tamain, B., Crema, E., Doubre, H., Hagel, K., Jin, G.M., Péghaire, A., Saint-Laurent, F., Cassagnou, Y., Legrain, R., Lebrun, C., Rosato, E., Macgrath, R., Jeong, S.C., Lee, S.M., Nagashima, Y., Nakagawa, T., Ogihara, M., Kasagi, J., Motobayashi, T.
Format: Artikel
Sprache:eng
Schlagworte:
Nuclear Experiment
Physics
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Zusammenfassung:Charged particles and fragments emitted in reactions between 40Ar at 45 and 65 MeV/u and an 27Al target have been detected in a geometry close to 4π in the center of mass. A new global variable, the average parallel velocity, has been used to sort the events as a function of the impact parameter value. For particles with Z = 1 and 2, a pre-equilibrium component is present. Its multiplicity increases strongly when the impact parameter value decreases, and reaches 7 in head-on reactions.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(90)91426-C