Discovery of antiproton trapping by long-lived metastable states in liquid helium

M. Iwasaki, S. N. Nakamura, K. Shigaki, Y. Shimizu, H. Tamura, T. Ishikawa, R. S. Hayano, E. Takada, E. Widmann, H. Outa, M. Aoki, P. Kitching, T. Yamazaki

Research output: Contribution to journalArticlepeer-review

225 Citations (Scopus)

Abstract

Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 sec.

Original languageEnglish
Pages (from-to)1246-1249
Number of pages4
JournalPhysical review letters
Volume67
Issue number10
DOIs
Publication statusPublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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