Interpretation of giant lines due to tunneling in  Cs$_2~0_g^-$
photoassociation spectrum

M. Vatasescu $^{1,2}$,
 C. Amiot$^1$, O. Dulieu $^1$, V. Kokoouline $^{1,3}$, F. Masnou-Seeuws$^1$\\
 C. Drag$^1$, D. Comparat$^1$ and P. Pillet$^1$
 
$^1$Laboratoire Aim\'e Cotton,Campus d'Orsay, 91405 Orsay, France\\
$^2$ Institute for Space Sciences, Bucarest-Magurele, Romania\\
$^3$  The Institute of Physics, Saint-Petersburg State University, Saint-Petersburg, Russia}