Unexpectedly enhanced α -particle preformation in Ti 48 probed by the (p,pα) reaction

Yasutaka Taniguchi, Kazuki Yoshida, Yohei Chiba, Yoshiko Kanada-En'yo, Masaaki Kimura, Kazuyuki Ogata

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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.

Original languageEnglish
Article numberL031305
JournalPhysical Review C
Issue number3
Publication statusPublished - Mar 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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