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

Research output: Contribution to journalArticle

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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 - 1994

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metastable atoms
helium atoms
antiprotons
metastable state
lasers
helium
vacuum
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Morita, N., Kumakura, M., Yamazaki, T., Widmann, E., Masuda, H., Sugai, I., ... 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

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

In: Physical Review Letters, Vol. 72, No. 8, 1994, p. 1180-1183.

Research output: Contribution to journalArticle

Morita, N, Kumakura, M, Yamazaki, T, Widmann, E, Masuda, H, Sugai, I, Hayano, RS, Maas, FE, Torii, HA, Hartmann, FJ, 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, vol. 72, no. 8, pp. 1180-1183. https://doi.org/10.1103/PhysRevLett.72.1180
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. / First observation of laser-induced resonant annihilation in metastable antiprotonic helium atoms. In: Physical Review Letters. 1994 ; Vol. 72, No. 8. pp. 1180-1183.
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AU - Morita, N.

AU - Kumakura, M.

AU - Yamazaki, T.

AU - Widmann, E.

AU - Masuda, H.

AU - Sugai, I.

AU - Hayano, R. S.

AU - Maas, F. E.

AU - Torii, H. A.

AU - Hartmann, F. J.

AU - Daniel, H.

AU - Von Egidy, T.

AU - Ketzer, B.

AU - Müller, W.

AU - Schmid, W.

AU - Horváth, D.

AU - Eades, J.

PY - 1994

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