II-C-1 Observation of Double-Resonant Laser-Induced Transitions in the v=n-l-1=2 Metastable Cascade of Antiprotonic ⁴He Atoms

R. S. HAYANO*, T. ISHIKAWA*, H. TAMURA*, H. A. TORII*, M. HORI*, F. E. MAAS* (*Univ. Tokyo), N. MORITA, M. KUMAKURA, I. SUGAI** (**INS, Univ. Tokyo), F. J. HARTMANNÝ, H. DANIEL^Ý, T. von EGIDY^Ý, B. KETZER^Ý, R. POHL^Ý (^ÝMunchen Tech. Univ.), D. HORVATH (KFKI Inst.), J. EADES^ÝÝ, E. WIDMANN^ÝÝ and T. YAMAZAKI^ÝÝ (^ÝÝCERN)

[Phys. Rev. A 55, R1 (1997)]

Another laser-induced resonant transition in the v =n-l-1=2 metastable cascade of antiprotonic ⁴He atoms has been found by using a double-resonance technique. This was done by setting the first laser to the already known 470.724 nm resonance [(n,l) = (37,34) -> (36,33)], while the (38,35) -> (37,34) transition was searched for with the second laser. The resonant transition was found at a wavelength of 529.622 ±0.003 nm, showing excellent agreement with a recent prediction of Korobov.

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