First observation of laser-induced resonant annihilation in metastable antiprotonic helium atoms

N. Morita, M. Kumakura, T. Yamazaki, E. Widmann, H. Masuda, I. Sugai, R. S. Hayano, F. E. Maas, H. A. Torii, F. J. Hartmann, H. Daniel, T. Von Egidy, B. Ketzer, W. Müller, W. Schmid, D. Horváth, J. Eades

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Abstract

We have observed the first laser-induced resonant transitions in antiprotonic helium atoms. These occur between metastable states and Auger dominated short lived states, and show that the anomalous longevity of antiprotons previously observed in helium media results from the formation of high-n high-l atomic states of p̄He+. The observed transition with vacuum wavelength 597.259±0.002 nm is tentatively assigned to (n,l)=(39,35)→(38,34).

Original languageEnglish
Pages (from-to)1180-1183
Number of pages4
JournalPhysical review letters
Volume72
Issue number8
DOIs
Publication statusPublished - Jan 1 1994

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Morita, N., Kumakura, M., Yamazaki, T., Widmann, E., Masuda, H., Sugai, I., Hayano, R. S., Maas, F. E., Torii, H. A., Hartmann, F. J., Daniel, H., Von Egidy, T., Ketzer, B., Müller, W., Schmid, W., Horváth, D., & Eades, J. (1994). First observation of laser-induced resonant annihilation in metastable antiprotonic helium atoms. Physical review letters, 72(8), 1180-1183. https://doi.org/10.1103/PhysRevLett.72.1180