Rotationally Resolved REMPI Spectra of CaH in a Molecular Beam |
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Authors: | R PereiraS Skowronek AGonzález Ureña A PardoJML Poyato AH Pardo |
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Institution: | a Unidad de Láseres y Haces Moleculares, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Juan XXIII-1, Madrid, 28040, Spainb Departamento de Qu?́mica F?́sica Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spainf1laseres@pluri.ucm.esf1 |
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Abstract: | 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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