Light particle-evaporation residue coincidences for the {sup 79}Br+{sup 27}Al system at 11.8 MeV/nucleon

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.222· OSTI ID:277405

Gomez del Campo, J; Shapira, D; Korolija, M; Kim, H J; Teh, K; Shea, J ^[1]; Wieleczko, J P ^[2]; Chavez, E; Ortiz, M E; Dacal, A ^[3]; Volant, C ^[4]; DOnofrio, A ^[5]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Grand Accelerateur National dIons Lourds, Boite Postale 5133, 14040 Caen CEDEX (France)
3. Instituto de Fisica Universidad Nacional Autonoma de Mexico, Mexico 01000 D.F. (Mexico)
4. DAPNIA/SPhN CEN-Saclay, 91191 Gif-sur-Yvette, Cedex (France)
5. Universita degli Studi di Salerno, Baronisi Salerno, and Istituto Nazionale di Fisica Nucleare, 80125 Napoli (Italy)

Evaporation residues (ER) of {ital Z}=34{endash}43 are measured in singles and in coincidence with emitted protons, deuterons, tritons, and alpha particles. Measurements are done with a large detector array that covers the scattering angles from 2.5{degree} to 25{degree}. The energy centroids of the coincidence spectra of the protons are reasonably well described by statistical model calculations assuming complete fusion, although those for the deuterons and tritons are not. The {alpha}-particle spectra are significantly different than the calculated ones. The slopes of the high energy spectra of the protons required a level density parameter {ital a}{approx_gt}{ital A}/12. Comparisons between the experimental ER singles spectra and complete fusion calculations show small deviations that can be explained by incomplete fusion however, when analyzed in coincidence with light particles a very good description with complete fusion is found especially if the emission of intermediate mass fragments is included in the calculations. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 277405
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA PARTICLES
ALUMINIUM 27 TARGET
BROMINE 79 REACTIONS
COINCIDENCE METHODS
DEUTERONS
EMISSION
ENERGY SPECTRA
ENERGY-LEVEL DENSITY
EVAPORATION MODEL
INCOMPLETE FUSION REACTIONS
MEV RANGE 100-1000
NUCLEAR FRAGMENTS
PROTONS
STATISTICAL MODELS
TRITONS