Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms

B. Ketzer; F. J. Hartmann; T. Von Egidy; C. Maierl; R. Pohl; J. Eades; E. Widmann; T. Yamazaki; M. Kumakura; N. Morita; R. S. Hayano; M. Hori; T. Ishikawa; H. A. Torii; I. Sugai; D. Horváth

doi:10.1103/PhysRevLett.78.1671

Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms

B. Ketzer
, F. J. Hartmann
, T. Von Egidy
, C. Maierl
, R. Pohl
, J. Eades
, E. Widmann
, T. Yamazaki
, M. Kumakura
, N. Morita
, R. S. Hayano
, M. Hori
, T. Ishikawa
, H. A. Torii
, I. Sugai
, D. Horváth

Chair of Physics I

Technical University of Munich
European Organization for Nuclear Research
Institute for Molecular Science
University of Tokyo
Wigner Research Centre for Physics

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Laser resonance transitions between normally metastable states of antiprotonic helium atoms were observed making use of state dependent quenching effects caused by small admixtures of H₂ molecules. By selectively shortening the lifetimes of states with higher principal quantum number n as compared to those of lower n, this method for the first time provides access to all initially populated metastable states of p-He⁺ atoms. This was demonstrated by observing the transitions (n, l) = (38, l)→(39, l+1), l = 35,36,37 and (n, l) = (37, l)→(38, l+1), l = 34,35,36.

Original language	English
Pages (from-to)	1671-1674
Number of pages	4
Journal	Physical Review Letters
Volume	78
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.78.1671
State	Published - 3 Mar 1997

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Ketzer, B., Hartmann, F. J., Von Egidy, T., Maierl, C., Pohl, R., Eades, J., Widmann, E., Yamazaki, T., Kumakura, M., Morita, N., Hayano, R. S., Hori, M., Ishikawa, T., Torii, H. A., Sugai, I., & Horváth, D. (1997). Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms. Physical Review Letters, 78(9), 1671-1674. https://doi.org/10.1103/PhysRevLett.78.1671

@article{d35622de9e5e46e596b2ad8e5b9a2d43,

title = "Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms",

abstract = "Laser resonance transitions between normally metastable states of antiprotonic helium atoms were observed making use of state dependent quenching effects caused by small admixtures of H2 molecules. By selectively shortening the lifetimes of states with higher principal quantum number n as compared to those of lower n, this method for the first time provides access to all initially populated metastable states of p-He+ atoms. This was demonstrated by observing the transitions (n, l) = (38, l)→(39, l+1), l = 35,36,37 and (n, l) = (37, l)→(38, l+1), l = 34,35,36.",

author = "B. Ketzer and Hartmann, \{F. J.\} and \{Von Egidy\}, T. and C. Maierl and R. Pohl and J. Eades and E. Widmann and T. Yamazaki and M. Kumakura and N. Morita and Hayano, \{R. S.\} and M. Hori and T. Ishikawa and Torii, \{H. A.\} and I. Sugai and D. Horv{\'a}th",

year = "1997",

month = mar,

day = "3",

doi = "10.1103/PhysRevLett.78.1671",

language = "English",

volume = "78",

pages = "1671--1674",

journal = "Physical Review Letters",

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publisher = "American Physical Society",

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Ketzer, B, Hartmann, FJ, Von Egidy, T, Maierl, C, Pohl, R, Eades, J, Widmann, E, Yamazaki, T, Kumakura, M, Morita, N, Hayano, RS, Hori, M, Ishikawa, T, Torii, HA, Sugai, I & Horváth, D 1997, 'Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms', Physical Review Letters, vol. 78, no. 9, pp. 1671-1674. https://doi.org/10.1103/PhysRevLett.78.1671

TY - JOUR

T1 - Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms

AU - Ketzer, B.

AU - Hartmann, F. J.

AU - Von Egidy, T.

AU - Maierl, C.

AU - Pohl, R.

AU - Eades, J.

AU - Widmann, E.

AU - Yamazaki, T.

AU - Kumakura, M.

AU - Morita, N.

AU - Hayano, R. S.

AU - Hori, M.

AU - Ishikawa, T.

AU - Torii, H. A.

AU - Sugai, I.

AU - Horváth, D.

PY - 1997/3/3

Y1 - 1997/3/3

N2 - Laser resonance transitions between normally metastable states of antiprotonic helium atoms were observed making use of state dependent quenching effects caused by small admixtures of H2 molecules. By selectively shortening the lifetimes of states with higher principal quantum number n as compared to those of lower n, this method for the first time provides access to all initially populated metastable states of p-He+ atoms. This was demonstrated by observing the transitions (n, l) = (38, l)→(39, l+1), l = 35,36,37 and (n, l) = (37, l)→(38, l+1), l = 34,35,36.

AB - Laser resonance transitions between normally metastable states of antiprotonic helium atoms were observed making use of state dependent quenching effects caused by small admixtures of H2 molecules. By selectively shortening the lifetimes of states with higher principal quantum number n as compared to those of lower n, this method for the first time provides access to all initially populated metastable states of p-He+ atoms. This was demonstrated by observing the transitions (n, l) = (38, l)→(39, l+1), l = 35,36,37 and (n, l) = (37, l)→(38, l+1), l = 34,35,36.

UR - https://www.scopus.com/pages/publications/0031550734

U2 - 10.1103/PhysRevLett.78.1671

DO - 10.1103/PhysRevLett.78.1671

M3 - Article

AN - SCOPUS:0031550734

SN - 0031-9007

VL - 78

SP - 1671

EP - 1674

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

ER -

Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms

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