The formation of α particles on nuclear surfaces has remained a fundamental problem since the dawn of nuclear physics. This α-particle formation strongly affects the α-decay lifetimes of heavy and superheavy elements, level scheme of light nuclei, and synthesis of elements in stars. However, despite its importance, the α-particle formation in medium-mass nuclei is seldom investigated. Based on the Ti48(p,pα)Ca44 reaction analysis, this study reports that α-particle formation in the medium-mass Ti48 nucleus is pronounced more compared to that expected through mean-field approximations. Moreover, the estimated average distance between the α particle and residue equals approximately 4.5 fm. This result poses a challenge to describe the four nucleon correlations using microscopic nuclear models.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics