1. Correlation functions and emission time sequence of light charged particles from projectile-like fragment source in E/A = 44 and 77 MeV 40Ar + 27Al collisions
- Author
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Ghetti, R., Helgesson, J., Lanzano, G., De Filippo, E., Geraci, M., Aiello, S., Cavallaro, S., Pagano, A., Politi, G., Charvet, J.L., Dayras, R., Pollacco, E., Volant, C., Beck, C., Mahboub, D., Nouicer, R., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
- Subjects
two-particle correlation functions ,Nuclear Theory ,FOS: Physical sciences ,$^{27}$Al($^{40}$Ar ,emission time sequence ,77 MeV/nucleon ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,other reaction mechanism features ,E=44 ,deduced ,25.70.Pq ,25.70.Mn ,measured ,light charged particle and projectile-like fragments spectra ,Nuclear reactions ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,X) - Abstract
Two-particle correlation functions, involving protons, deuterons, tritons, and alpha-particles, have been measured at very forward angles (0.7 deg < theta_lab < 7 deg), in order to study projectile-like fragment (PLF) emission in E/A = 44 and 77 MeV 40Ar + 27Al collisions. Peaks, originating from resonance decays, are larger at E/A = 44 than at 77 MeV. This reflects the larger relative importance of independently emitted light particles, as compared to two-particle decay from unstable fragments, at the higher beam energy. The time sequence of the light charged particles, emitted from the PLF, has been deduced from particle-velocity-gated correlation functions (discarding the contribution from resonance decays). Alpha-particles are found to have an average emission time shorter than protons but longer than tritons and deuterons., 18 pages, 5 figures, submitted to Nuclear Physics A
- Published
- 2004