RT Journal Article
T1 A femtosecond velocity map imaging study on B-band predissociation in CH3I. I. The band origin
A1 Gitzinger, Gregory
A1 Corrales Castellanos, María Eugenia
A1 Loriot, Vincent
A1 Amaral Mathon, Gabriel
A1 Nalda Míguez, Rebeca de
A1 Bañares Morcillo, Luis
AB A femtosecond pump-probe experiment, coupled with velocity map ion imaging, is reported on the second absorption band (B-band) of CH3I. The measurements provide a detailed picture of real-time B-band predissociation in the band origin at 201.2 nm. Several new data are reported. (i) A value of 1.5±0.1 ps has been obtained for the lifetime of the excited state, consistent within errors with the only other direct measurement of this quantity [A. P. Baronavski and J. C. Owrutsky, J. Chem. Phys. 108, 3445 (1998)]. (ii) It has been possible to measure the angular character of the transition directly through the observation of fragments appearing early with respect to both predissociation lifetime and molecular rotation. (iii) Vibrational activity in CH3 has been found, both in the umbrella (ν2) and the symmetric stretch (ν1) modes, with estimates of relative populations. All these findings constitute a challenge and a test for much-wanted high level ab initio and dynamics calculations in this energy region.
SN 0021-9606
YR 2010
FD 2010
LK https://hdl.handle.net/20.500.14352/94589
UL https://hdl.handle.net/20.500.14352/94589
LA eng
NO G. Gitzinger, M. E. Corrales, V. Loriot, G. A. Amaral, R. de Nalda, L. Bañares; A femtosecond velocity map imaging study on B-band predissociation in I. The band origin. J. Chem. Phys. 21 June 2010; 132 (23): 234313. https://doi.org/10.1063/1.3455207
NO European Commission
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 18 dic 2025