Isotopic dependence of fusion cross-sections - linear relationships
Rajeev K. Puri - Manoj K. Sharma - Raj K. Gupta
Centre of Advanced Study in Physics, Panjab University, Chandigarh 160014, India
Received: 27 February 1998 / Revised version: 22 May 1998 Communicated by P. Schuck
A systematic study of isotopic dependence of fusion cross-section is carried out by adding neutrons gradually to N=Z colliding nuclei. We find that fusion barrier position increases and height decreases, both linearly with the increase of N/Z ratio of the compound system. The increase in barrier position is larger compared to decrease in barrier height. In terms of these linear relationships, a parameterized form of fusion cross-sections is given for the neutron-rich colliding nuclei. The fusion cross-sections are also enhanced linearly with the N/Z ratio, and this enhancement is larger for lower incident centre-of-mass energies and independent of the choice of reaction partners. Experimental data and other theoretical studies are called for to verify these results.
24.10.-i Nuclear-reaction models and methods - 25.70.-z Low and intermediate energy heavy-ion reactions - 25.70.Jj Fusion and fusion-fission reactions - 25.60.Pj Fusion reactions