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Rotationally Resolved REMPI Spectra of CaH in a Molecular Beam

✍ Scribed by R. Pereira; S. Skowronek; A.González Ureña; A. Pardo; J.M.L. Poyato; A.H. Pardo

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
110 KB
Volume
212
Category
Article
ISSN
0022-2852

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✦ Synopsis

Rotationally resolved spectra of the CaH radical using a supersonic molecular beam are reported. Thus, high energy resolution of the (1 + 1 ) REMPI spectra corresponding to the A ← X and B ← X electronic transitions were measured which allowed for the first time a clear and precise analysis of the low rotational part (J ≤ 7) of the CaH spectrum. A comparison with previous studies revealed that the commonly accepted energy separation between the two band heads of B -X (v = 1, v = 0) of 10 cm -1 is not correct. A value of ca. 1.6 cm -1 was found to be more realistic. On the other hand, the present study confirmed that the perturbation appears only for v = 1, N > 3 of the B state.

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