Ternary fission of various Z=120 isotopes with 3H, 4He and 8Be as light charge particle

Abstract

The spontaneous cold ternary fission of various Z = 120 isotopes accompanied by light charge particles (LCP's)³H, ⁴He and ⁸Be in equatorial configuration is investigated using Unified ternary fission model (UTFM). The favourable ternary fission channel is predicted based on the computation of Q value, driving potential, barrier penetrability and relative yield of all potential ternary fragment configurations. For the parent isotopes ^302,306,308,120 with LCP ³H, the maximum relative yield is for the combinations that have one fragment respectively as ^131,132I and ¹³⁹Ba, which are nearly magic. However, in the case of³¹⁰120 with LCP ³H, the combination ¹⁴⁵La+¹⁶²Sm+³H exhibits the maximum relative yield. For the ⁴He accompanied fission of ^{302,306,308,310,}120 isotopes, the fragmentation that include ¹³⁹Cs, ^140,144Ba and ¹³¹Te isotopes, which is in the vicinity of shell closure possess high relative yield. In the case of⁸Be accompanied ternary breakup of the parent isotopes ^302,306,120, the maximum yield is due to the magic neutron shell and near-magic proton shell of ¹³⁴Te. Whereas, for parent isotopes ^308,310,120, it is due to the presence of respective doubly magic ¹³²Sn and near doubly magic ¹³¹Sn as one fragment. Therefore, our findings emphasize the prominent role of both high Q value as well as existence of doubly and near doubly magic nuclei in the ternary fission of super heavy even-even isotopes ^{302,306–310,}120, accompanied by light charge particles ³H, ⁴He and ⁸Be.