Korobov's updated values for "Spin-independent part of transition energies for pbar-4He", Oct 7 in pdf and in tex
T.Y's note on "the hyperfine structure of (37,35) state" (Aug 22, 2001) in pdf and in tex.
Korobov-Bakalov paper on the HFS of (37,35) (Aug 08, 2001) - J.Phys.B.
Kino's value for 3He energy levels and transition wavelengths (Aug 02, 2001)
Bakalov's prediction for 3He density shift is available HERE (July 10, 2001)
Latest theoretical values of the transition energy is HERE.
Favored transition diagram
Unfavored transition diagram

Antiprotonic helium "atomcule" is a metastable 3-body system consisting of a helium nucleus, an electron and an antiproton, and its structure has been revealed by the laser spectroscopy. The thick arrows in the level diagram below indicate the laser transitions observed so far by the PS205 experiment. ASACUSA phase-1 experiment will focus on i) higher resolution, ii) hyperfine structure, and iii) atomcule interaction with other atoms and molecules.

Watch A movie showing the history of resonance hunting HERE.

eps file of the above figure is here