Lifetimes of well characterized hot nuclei via small-angle particle-particle correlations: [sup 40]Ar+Ag ([ital E]/[ital A]=7. 8 and 17 MeV)

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.284· OSTI ID:5339531

Elmaani, A; Alexander, J M; Ajitanand, N N; Lacey, R A ^[1]; Kox, S; Liatard, E; Merchez, F; Motobayashi, T; Noren, B; Perrin, C; Rebreyend, D; Chan, T U ^[2]; Auger, G; Groult, S ^[3]

---

1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)
2. Institut des Sciences Nucleaires de Grenoble, IN2P3-Centre National de la Recherche Scientifique/Universite Joseph Fourier, 53 Avenue des Martyrs, F 38026, Grenoble CEDEX (France)
3. Grand Accelerateur National d'Ions Lourds, Boite Postale 5027, 14021 Caen CEDEX (France)

Particle-particle correlations are studied for large- and small-angle separations for the reactions 312 and 680 MeV [sup 40]Ar+[sup nat]Ag. The spectral shapes and angular ansiotropies allow a characterization of the effective temperatures and spin zones of the hot nuclear emission sources. Small-angle correlations are compared to reaction simulations that employ various parametrizations for the emission time scales. We conclude that the initial lifetime scale for [sup 1,2,3]H particle evaporation is of the order of 10[sup [minus]22] s. These times are so short as to suggest a breakdown of the concept of sequential evaporation,'' for which a new ansatz is explored.

• OSTI ID: 5339531
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 49:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 40 REACTIONS
LIFETIME
PARTICLES
CORRELATIONS
SILVER 107 TARGET
SILVER 109 TARGET
ANGULAR DISTRIBUTION
EVAPORATION
FRAGMENTATION
NUCLEAR TEMPERATURE
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
HEAVY ION REACTIONS
NUCLEAR REACTIONS
PHASE TRANSFORMATIONS
TARGETS
663110* - General & Average Properties of Nuclei & Nuclear Energy Levels- (1992-)
663450 - Heavy-Ion-Induced Reactions & Scattering- (1992-)
663560 - Nuclear Mass Ranges- A=90-149- (1992-)