Elastic scattering and fusion cross sections for {sup 7}Be,{sup 7}Li+{sup 27}Al systems

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.024609· OSTI ID:20771279

Kalita, K; Verma, S; Singh, R ^[1]; Das, J J; Jhingan, A; Madhavan, N; Nath, S; Varughese, T; Sugathan, P ^[2]; Parkar, V V; Mahata, K; Ramachandran, K; Shrivastava, A; Chatterjee, A; Kailas, S ^[3]; Barua, S ^[4]; Basu, P; Majumdar, H ^[5]; Sinha, M; Bhattacharya, R ^[6]

---

1. Department of Physics and Astrophysics, University of Delhi, Delhi-110007 (India)
2. Inter University Accelerator Centre, New Delhi-110067 (India)
3. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai-400085 (India)
4. Department of Physics, Gauhati University, Guwahati-781014 (India)
5. Saha Institute of Nuclear Physics, Kolkata-700064 (India)
6. Gurudas College, Kolkata-700054 (India)

Quasi-elastic-scattering and transfer reaction cross-section measurements were made for the {sup 7}Be+{sup 27}Al system at E{sub lab}=17, 19, and 21 MeV in the angular range {theta}{sub c.m.}=12 deg. An optical model (OM) analysis of the quasi-elastic scattering data was carried out. The fusion cross sections were derived at these energies by subtraction of the integrated transfer cross sections from the reaction cross sections obtained from the fits to quasi-elastic-scattering data. These fusion cross sections were found to be consistent with those obtained from the coupled-channels calculations. Elastic scattering and fusion cross sections were measured for the {sup 7}Li+{sup 27}Al system at E{sub lab}=10, 13, 16, 19, and 24 MeV. For elastic scattering the angular coverages were in the {theta}{sub lab}=12 deg. - 72 deg. range and for fusion the {alpha}-evaporation spectra from the compound nucleus were measured in the angular range {theta}{sub lab}=52 deg. - 132 deg. (142 deg. at 10 MeV). The elastic-scattering angular distributions were subjected to OM analysis. The {alpha}-evaporation spectra were reproduced with the statistical model calculations, and the fusion cross sections were extracted from them. The fusion cross sections were also extracted by subtraction of the integrated inelastic-scattering cross sections from the reaction cross sections obtained from the OM fits to the elastic-scattering data, and these fusion data were found to be consistent. The CCDEF calculations describe these data quite well. A comparison of the fusion data for the {sup 7}Be+{sup 27}Al and {sup 7}Li+{sup 27}Al systems shows a similar and consistent behavior.

• OSTI ID: 20771279
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
BERYLLIUM 7
BERYLLIUM 7 REACTIONS
COMPARATIVE EVALUATIONS
COMPOUND NUCLEI
COUPLED CHANNEL THEORY
CROSS SECTIONS
ELASTIC SCATTERING
EVAPORATION MODEL
HEAVY ION FUSION REACTIONS
INELASTIC SCATTERING
LITHIUM 7
LITHIUM 7 REACTIONS
MEV RANGE
OPTICAL MODELS
QUASI-ELASTIC SCATTERING
STATISTICAL MODELS
TRANSFER REACTIONS