BARC/PUB/2012/0224

 
 

Disentangling reaction mechanisms for α production in the 6Li + 209Bi reaction

 
     
 
Author(s)

Santra, S.; Kailas, S.; Parkar, V. V.; Ramachandran, K.; Jha, V.; Chatterjee, A.; Rath, P. K.; Parihari, A.
(NPD)

Source

Physical Review-C, 2012. Vol. 85: pp. 014612.1-014612.8

ABSTRACT

Inclusive breakupα cross sections (σαincl) are measured for the 6Li+209Bi reaction at bombarding energies Elab = 24–50 MeV.  The σα incl was observed to be a substantial fraction of the total reaction cross section over the entire energy range, and it exhausts almost whole of the reaction cross section at sub-barrier energies. An investigation on the origin of large inclusive α reveals that most of the α particles are produced by non capture breakup (6Li→α + d) and incomplete fusion via d capture. The combined cross sections of noncapture breakup,d capture, and transfer reactions successfully explain the origin of most of the experimental σαincl  over the measured energy range. A comparison of the σαincl  versus reduced energies for several targets involving 6Li as projectile shows that the cross sections are independent of target. Interestingly, the difference between reaction and complete fusion cross sections “σreac − σCF” for several reactions also shows the same behavior.

 
 
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