Eur. Phys. J. A (2007) 32: 55-59
https://doi.org/10.1140/epja/i2006-10279-1

Regular Article - Heavy Ion Physics

Correlations of neutral and charged particles in ⁴⁰Ar- ⁵⁸Ni reaction at 77 MeV/u

¹ Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00662, Warsaw, Poland
² Universite Libre de Bruxelles, Av. F. D. Roosevelt, 50, CP 229, B-1050, Bruxelles, Belgium
³ IRES, IN2P3-CNRS/Université Louis Pasteur, BP 28, F-67037, Strasbourg Cedex 2, France
⁴ Laboratoire de Physique Corpusculaire, IN2P3, CNRS/ISMRA, F-14050, Caen Cedex, France
⁵ ISN, IN2P3/CNRS, et Université J. Fourier, 53 Av. des Martyrs, F-38026, Grenoble Cedex, France
⁶ SUBATECH, UMR Université, EMN, IN2P3/CNRS, 4 rue A. Kastler, F-44307, Nantes, France
⁷ Institute of Theoretical and Experimental Physics, B. Cheremushinskaya 25, 117259, Moscow, Russia
⁸ Institute of Physics ASCR, Na Slovance 2, 18221, Prague 8, Czech Republic

Received: 7 December 2006
Accepted: 26 February 2007
Published online: 26 March 2007

Abstract

The measurement of the two-particle correlation function for different particle species allows to obtain information about the development of the particle emission process: the space-time properties of emitting sources and the emission time sequence of different particles. The single-particle characteristics and two-particle correlation functions for neutral and charged particles registered in forward direction are used to determine that the heavy fragments (deuterons and tritons) are emitted in the first stage of the reaction (pre-equilibrium source) while the majority of neutrons and protons originates from the long-lived quasi-projectile. The emission time sequence of protons, neutrons and deuterons has been obtained from the analysis of non-identical particle correlation functions.