Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules

T. Yamazaki, B. Ketzer, E. Widmann, J. Eades, H. Daniel, F. J. Hartmann, M. Hasinoff, R. Pohl, R. Schmidt, T. Von Egidy, D. Horváth, M. Kumakura, N. Morita, I. Sugai, Y. Fujita, H. A. Torii, M. Hori, T. Ishikawa, F. E. Maas, H. TamuraR. S. Hayano

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalChemical Physics Letters
Volume265
Issue number1-2
DOIs
Publication statusPublished - 1997 Jan 31
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄<sup>4</sup>He<sup>+</sup> with surrounding H<sub>2</sub> molecules'. Together they form a unique fingerprint.

Cite this