Role of high l values in the onset of incomplete fusion
- INFN - Laboratori Nazionali di Legnaro, I-35020 Legnaro (Italy)
- Accelerator Laboratory, Department of Physics, A. M. University, Aligarh 202 002 (India)
- Physics Department, S. V. College, Aligarh 202 001 (India)
- NP-Group, Inter-University Accelerator Center, New Delhi 110 067 (India)
A particle-{gamma}-coincidence experiment is performed to investigate the role of high l values in the production of direct-{alpha}-emitting channels (associated with incomplete fusion) in {sup 12}C+{sup 169}Tm system. Spin distributions of various xn/pxn/{alpha}xn/2{alpha}xn channels are measured at E{sub lab}=5.6A and 6.5A MeV. Entirely different de-excitation patterns are observed in direct-{alpha}-emitting channels and fusion-evaporation channels. The fusion-evaporation channels are found to be strongly fed over a broad spin range. While narrow range feeding for only high-spin states was observed in the case of direct-{alpha}-emitting channels, in the present work, incomplete fusion is shown to be a promising tool to populate high-spin states in final reaction products. To have better insight into the associated l values in different reaction channels, the present data are compared with similar data obtained in {sup 16}O(E{sub lab}{approx_equal}5.6A MeV) + {sup 169}Tm system. The mean driving angular momenta involved in the production of direct-{alpha}-emitting channels are found to be higher than those involved in the production of fusion-evaporation channels. Direct-{alpha} multiplicity in the forward cone increases with driving angular momenta, which indicates the origin of direct-{alpha}-emitting channels at high l values in noncentral interactions.
- OSTI ID:
- 21296594
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 80, Issue 6; Other Information: DOI: 10.1103/PhysRevC.80.064603; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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