Laser-induced resonant transition at 470.724 nm in the {ital v}={ital n}{minus}{ital l}{minus}1=2 cascade of metastable antiprotonic helium atoms

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.52.4266· OSTI ID:147640

Maas, F E; Hayano, R S; Ishikawa, T; Tamura, H; Torii, H A ^[1]; Morita, N ^[2]; Yamazaki, T; Sugai, I; Nakayoshi, K ^[3]; Hartmann, F J; Daniel, H; von Egidy, T; Ketzer, B; Niestroj, A; Schmid, S; Schmid, W ^[4]; Horvath, D ^[5]; Eades, J; Widmann, E ^[6]

---

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

A laser-induced resonant transition in metastable antiprotonic helium atoms has been found at a wavelength of 470.724{plus_minus}0.002 nm and assigned to the transition ({ital n},{ital l})=(37,34){r_arrow}(36,33). From the time evolution of the laser resonance intensity, the decay rate of the (37,34) state was determined to be 1.17{plus_minus}0.09 {mu}s{sup {minus}1}, about 60% larger than the theoretical radiative decay rate. The sum of the initial populations in the {ital v}={ital n}{minus}{ital l}{minus}1=2 decay chain was 23{plus_minus}4% of the total number of metastable atoms formed.

• OSTI ID: 147640
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTIPROTONS
DECAY
ENERGY-LEVEL TRANSITIONS
HELIUM
METASTABLE STATES
RESONANCE
WAVELENGTHS