Spectroscopic study of the 61Πu state in Li2

Anna Grochola (1) , Wlodzimierz Jastrzebski (2) , Pawel Kowalczyk (1)

1 UW - University of Warsaw
2 PAN - Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences

The 61Πu ← X1Σ+g band system in the Li2 molecule is investigated by the polarisation labelling spectroscopy technique. The excited state is characterised by a set of Dunham coefficients describing f parity levels v = 0 - 11, J = 2 - 47 in the 7Li2 isotopologue and the absolute vibrational numbering is determined by observation of the isotopic effect. The state is identified as 61Πu(2s+4d) by comparison with theoretical calculations. The main equilibrium constants are Te = 36863.25(5) cm-1 (with respect to the minimum of the electronic ground state), ωe = 253.567(36) cm-1, Re = 3.1639(2) Å.

Mots clés: Physical Sciences

Anna Grochola, Wlodzimierz Jastrzebski, Pawel Kowalczyk. Spectroscopic study of the 61Πu state in Li2. Molecular Physics, 2008, 106 (11), pp.1375-1378. ⟨10.1080/00268970802275595⟩. ⟨hal-00513218⟩