Hydrogen-Assisted Laser-Induced Resonant Transitions between Metastable States of Antiprotonic Helium Atoms

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.1671· OSTI ID:467450

Ketzer, B; Hartmann, F; von Egidy, T; Maierl, C; Pohl, R ^[1]; Eades, J; Widmann, E; Yamazaki, T ^[2]; Kumakura, M; Morita, N ^[3]; Hayano, R; Hori, M; Ishikawa, T; Torii, H ^[4]; Sugai, I ^[5]; Horvath, D ^[6]

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1. Physik-Department, Technische Universitaet Muenchen, D-85747 Garching (Germany)
2. CERN, CH-1211 Geneva 23 (Switzerland)
3. Institute for Molecular Science, Myodaiji, Okazaki 444 (Japan)
4. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113 (Japan)
5. Institute for Nuclear Study, University of Tokyo, 3-2-1 Midori-cho, Tanashi, Tokyo 188 (Japan)
6. Central Research Institute for Physics, Research Institute for Particle and Nuclear Physics, H-1525 Budapest (Hungary)

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 H{sub 2} 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 {ital {bar p}}He{sup +} atoms. This was demonstrated by observing the transitions (n,l)=(38,l){r_arrow}(39,l+1), l=35,36,37 and (n,l)=(37,l){r_arrow}(38,l+1), l=34,35,36. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 467450
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTIPROTONS
ATOMS
HELIUM
HYDROGEN
LASER SPECTROSCOPY
LIFETIME
METASTABLE STATES
QUANTUM NUMBERS
QUENCHING
RESONANCE