Two-neutron correlations at small relative momenta in $\chem{^{40}Ar + {}^{197}Au}$ collisions at 60 MeV/nucleon

J. Pluta - et al.

doi:doi:10.1007/s100500070056

2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A 9, 63-68

Two-neutron correlations at small relative momenta in $\ensuremath{\mathsf{^{40}Ar + {}^{197}Au}}$ collisions at 60 MeV/nucleon

J. Pluta¹ - K. Wosinska¹ - Z. Basrak² - G. Bizard³ - B. Benoit⁴ - P. Désesquelles⁵ - O. Dorvaux⁶ - D. Durand³ - B. Erazmus⁷ - F. Hanappe⁴ - B. Jakobsson⁸ - C. Lebrun⁷ - F.R. Lecolley³ - R. Lednicky⁹ - P. Leszczynski¹ - K. Mikhailov¹⁰ - K. Miller¹ - B. Noren⁸ - T. Pawlak¹ - M. Przew $\l$ ocki¹ - Ö. Skeppstedt¹¹ - A. Staranowicz¹ - A. Stavinskiy¹⁰ - L. Stuttgé¹² - B. Tamain³

¹ Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland
² Rud height 0.09ex width 0.2em height 0.09ex width 0.06emer Boskovic Institute, P.O. Box 180, HR-10002 Zagreb, Croatia
³ Laboratoire de Physique Corpusculaire, IN2P3-CNRS, ISMRA et Université, 14050 Caen cedex, France
⁴ Université Libre de Bruxelles, B-1050 Bruxelles, Belgium
⁵ Institut des Sciences Nucléaires, IN2P3-CNRS et Université J. Fourier, 38026 Grenoble cedex, France
⁶ Accelerator Laboratory, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä, Finland
⁶ Laboratoire SUBATECH, École des Mines de Nantes, IN2P3-CNRS et Université, 44307 Nantes cedex 03, France
⁷ University of Lund, 22100 Lund, Sweden
⁸ Institute of Physics ASCR, Na Slovance 2, 18221 Prague 8, Czech Republic
⁹ Institute for Theoretical and Experimental Physics, Moscow, Russia
¹⁰ Chalmers University of Technology, 412 96 Göteborg, Sweden
¹¹ Institut de Recherches Subatomiques, IN2P3-CNRS et Université L. Pasteur, 67037 Strasbourg cedex 2, France

Received: 5 April 2000 / Revised version: 10 July 2000
Communicated by D. Guerreau

Abstract
Two-neutron correlation functions are measured in the ⁴⁰Ar+¹⁹⁷Au reaction at 60 MeV/nucleon to study the space-time characteristics of neutron emitting sources. The source temperatures and velocities are deduced by fitting the single-neutron energy spectra with a three-source model. A comparison of the correlation data with the predictions of the model of moving sources and with the dynamical Landau-Vlasov model suggests the relevance of a multisource description. Particular care has been paid to the influence of the relative source abundance on the shape of the correlation function.

PACS
25.70.-z Low and intermediate energy heavy-ion collisions - 25.75.Gz Particle correlations