Comparison of the /sup 28/Si(/sup 16/O,/sup 12/C)/sup 32/S and /sup 28/Si(/sup 18/O,/sup 14/C)/sup 32/S reactions at 60 MeV incident energy

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.19.62· OSTI ID:6384187

Berg, G P.A.; Fernandes, M A.G.; Nagatani, K; Peng, J C; Berthier, B; Fouan, J P; Gastebois, J; Le Fevre, J P; Lemaire, M

Cross-section angular distributions of the /sup 28/Si(/sup 16/O, /sup 12/C)/sup 32/S and the /sup 28/Si(/sup 18/O,/sup 14/C)/sup 32/S reactions leading to low-lying states in /sup 32/S and the /sup 18/O + /sup 28/Si elastic scattering have been measured at 60 MeV incident energy. Optical model parameters were obtained by the analysis of the measured /sup 18/O + /sup 28/Si elastic scattering and the analysis of existing /sup 16/O + /sup 28/Si elastic scattering data. The exact finite-range distorted-wave Born approximation analysis of the (/sup 16/O,/sup 12/C) reaction data showed that the transfer data could only be reproduced using a surface-transparent set of optical model parameters. On the contrary no optical model parameters could be found which provide simultaneously good fits of the /sup 18/O + /sup 28/Si elastic scattering and the (/sup 18/O,/sup 14/C) transfer data. The transfer data could be reproduced however, using optical model parameters which do not describe elastic scattering data. Relative spectroscopic factors were extracted for both transfer reactions and are compared with previous results of (/sup 16/O,/sup 12/C) and (/sup 6/Li,d) reaction studies. In addition we determined spectroscopic factors of the /sup 28/Si(/sup 12/C,/sup 8/Be)/sup 32/S reaction by reanalyzing existing data. The comparison suggests the conclusion that the (/sup 16/O,/sup 12/C) and (/sup 18/O,/sup 14/C) reactions proceed through different reaction mechanisms.

• Research Organization: Departement de Physique Nucleaire, Centre d'Etudes Nucleares de Saclay, Boite Postale No. 2, 91190 Gif-sur-Yvette, France
• OSTI ID: 6384187
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 19:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BORN APPROXIMATION
CARBON 12
CARBON 14
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELASTIC SCATTERING
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FOUR-NUCLEON TRANSFER REACTIONS
HEAVY ION REACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OPTICAL MODELS
OXYGEN 16 REACTIONS
OXYGEN 18 REACTIONS
RADIOISOTOPES
SCATTERING
SILICON 28 TARGET
SPECTROSCOPIC FACTORS
SPECTROSCOPIC FACTORS ELASTIC SCATTERING
STABLE ISOTOPES
SULFUR 32
SULFUR ISOTOPES
TARGETS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES