Role of high l values in the onset of incomplete fusion

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.064603· OSTI ID:21296594

Singh, Pushpendra P ^[1]; Yadav, Abhishek; Singh, Devendra P; Gupta, Unnati; Singh, D; Ansari, M A; Singh, B P; Prasad, R ^[2]; Sharma, Manoj K ^[3]; Kumar, R; Singh, R P; Muralithar, S; Bhowmik, R K ^[4]

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1. INFN - Laboratori Nazionali di Legnaro, I-35020 Legnaro (Italy)
2. Accelerator Laboratory, Department of Physics, A. M. University, Aligarh 202 002 (India)
3. Physics Department, S. V. College, Aligarh 202 001 (India)
4. 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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12
COINCIDENCE METHODS
DE-EXCITATION
HIGH SPIN STATES
INTERACTIONS
MEV RANGE 01-10
MULTIPLICITY
OXYGEN 16
SPIN
THULIUM 169