Exotic decay of hot rotating nuclei near proton drip line

J Ray ,S Muralithar,A K Singh,R K Bhowmik,K Selvakumar,U Datta Pramanik,A Rahaman,A Chakraborty ,Rohini Garg ,Indrani Ray ,S Ganguly ,D Negi ,Sandeep Goyal ,M Saxena ,Bishwa Nath Mukherjee ,S Mandal ,Prabir K Mukherjee ,Purnima Singh ,Surender Kumar ,Sovan Chakraborty ,Rajpal Singh

doi:10.1051/epjconf/20146602089

Abstract

Hot and rotating exotic 124Ce nucleus near proton drip line has been populated through fusion evaporation reaction of 32S and 92Mo. This exotic nucleus was de-excited by evaporating p, n, α and/or light nuclei etc and several exotic nuclei have been populated. The experimentally obtained relative population of those exotic nuclei have been compared with the statistical model calculation. Agreement between experimental and statistical model calculation have been observed for most of the evaporation channels. Huge enhancement in comparison to statistical model calculation have been observed fora few channels related to multiple proton evaporation which could not be explained by using default and modified input parameters in statistical calculation.

Highlights

Decay of hot and rotating compound nucleus far from stability or near drip line is one of the interesting topic in recent years
The de-excitation of compound nucleus, near stability, produced in fusion-evaporation reaction in general follows the standard statistical process. This standard statistical calculation has been implemented in various statistical codes like HIVAP, PACE, ALICE, CASCADE, GEMINI etc
It would be interesting to check whether the standard statistical model calculations are applicable to the evaporation of the compound nuclei far away from the stability or close to the drip line

Summary

Introduction

EPJ Web of Conferences yet to be investigated. These models predict decay of compound nucleus near stability very well, but near the nuclear drip line the compound nuclear systems are not rigorously studied. It would be interesting to check whether the standard statistical model calculations are applicable to the evaporation of the compound nuclei far away from the stability or close to the drip line. The aim of the present work is to study the de excitation of the highly excited exotic nucleus 124Ce (Sn=12.7 MeV and Sp=3.4 MeV), produced by fusion-evaporation reaction of 32S and 92Mo. The experimental result has been compared with statistical model predictions. The details of the experimental procedure is given in sec 2.

Experimental Details

Data analysis and Result

Summary