Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures

B. Juhász, J. Eades, R. S. Hayano, M. Hori, D. Horváth, T. Ishikawa, H. A. Torii, E. Widmann, H. Yamaguchi, T. Yamazaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Quenching of individual metastable states of antiprotonic helium (p̄He+) in collisions with H2 and D2 in gas phase was studied using a laser-resonance method at CERN's Antiproton Decelerator. The temperature dependence of the quenching cross-sections of the p̄He+ states (n,l) = (37,34), (38,35), and (38,37) in the reactions [p̄He+](n,l)+H2 and [p̄He+](n,l)+D2 was investigated in the temperature range of 25-300 K. Significant quantum tunnelling effects were revealed at low temperatures and (n,l)-dependent reaction barriers were deduced, in good agreement with recent theoretical calculations.

Original languageEnglish
Pages (from-to)91-98
Number of pages8
JournalChemical Physics Letters
Volume379
Issue number1-2
DOIs
Publication statusPublished - Sep 19 2003

    Fingerprint

ASJC Scopus subject areas

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

Cite this

Juhász, B., Eades, J., Hayano, R. S., Hori, M., Horváth, D., Ishikawa, T., Torii, H. A., Widmann, E., Yamaguchi, H., & Yamazaki, T. (2003). Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydrogenic molecules at low temperatures. Chemical Physics Letters, 379(1-2), 91-98. https://doi.org/10.1016/j.cplett.2003.08.041