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Title: Observation of incomplete fusion reactions at l < l {sub crit}

In order to understand the presence of incomplete fusion at low energies i.e. 4-7MeV/nucleon and also to study its dependence on various entrance-channel parameters, the two type of measurements (i) excitation function for {sup 12}C+{sup 159}Tb, and (ii) forward recoil ranges for {sup 12}C+{sup 159}Tb systems have been performed. The experimentally measured excitation functions have been analyzed within the framework of compound nucleus decay using statistical model code PACE4. Analysis of data suggests the production of xn/px)n-channels via complete fusion, as these are found to be well reproduced by PACE4 predictions, while, a significant enhancement in the excitation functions of α-emitting channels has been observed over the theoretical ones, which has been attributed due to the incomplete fusion processes. Further, the incomplete fusion events observed in case of forward recoil range measurements have been explained on the basis of the breakup fusion model, where these events may be attributed to the fusion of {sup 8}Be and/or {sup 4}He from {sup 12}C projectile to the target nucleus. In the present work, the SUMRULE model calculations are found to highly underestimate the observed incomplete fusion cross-sections which indicate that the l-values lower than l {sub crit} (limit of complete fusion) significantly contributemore » to the incomplete fusion reactions.« less
Authors:
; ; ; ; ;  [1] ;  [2] ; ; ; ;  [3] ;  [4]
  1. Department of Physics, Aligarh Muslim University, Aligarh (UP) - 202 002 (India)
  2. GSI-Helmholtz Centre for Heavy Ion Research GmbH, D-64291 Darmstadt (Germany)
  3. NP-Group: Inter-University Accelerator Center, Aruna Asaf Ali Marg, New Delhi - 110 067 (India)
  4. Department of Physics, S. V. College, Aligarh- 202 001 (India)
Publication Date:
OSTI Identifier:
22308433
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1609; Journal Issue: 1; Conference: FIG12: International conference on frontiers in gamma-ray spectroscopy 2012, New Delhi (India), 5-7 Mar 2012; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BERYLLIUM 8; CARBON 12; DATA; DATA ANALYSIS; EXCITATION FUNCTIONS; HELIUM 4; INCOMPLETE FUSION REACTIONS; NUCLEAR DECAY; NUCLEONS; RECOILS; STATISTICAL MODELS