RT Journal Article
T1 Femtosecond Time-Resolved Photofragment Rotational Angular Momentum Alignment in Electronic Predissociation Dynamics
A1 Corrales Castellanos, Maria Eugenia
A1 Shternin, Peter
A1 Rubio Lago, Luis
A1 Nalda, Rebeca de
A1 Vasyutinskii, Oleg
A1 Bañares Morcillo, Luis
AB This Letter presents an experimental and theoretical study of femtosecond time-resolved vector correlations in methyl iodide (CH3I) electronic predissociation via the second absorption B-band at 201.2 nm. The time evolution of the phenomenological anisotropy parameters βl was determined from time-resolved photofragment angular distributions obtained by means of the femtosecond laser pump–probe technique coupled with velocity map imaging detection of vibrational ground-state CH3(ν = 0) fragments and spin–orbit excited I*(2P1/2) atoms. Theoretical interpretation of the experimental results was performed on the basis of a fitting procedure using quasiclassical theory, which elucidates vector correlations in photodissociation of symmetric top molecules. The results of the fitting are in very good agreement with the experimental data and demonstrate the important role of molecular excited-state lifetimes, parent molecule and methyl fragment rotations, and methyl fragment angular momentum alignment on the time-dependent electronic predissociation dynamics.
SN 1948-7185
YR 2016
FD 2016
LK https://hdl.handle.net/20.500.14352/94418
UL https://hdl.handle.net/20.500.14352/94418
LA eng
NO M. E. Corrales, P. S. Shternin, L. Rubio-Lago, R. de Nalda, O. S. Vasyutinskii, and L. Bañares The Journal of Physical Chemistry Letters 2016 7 (22), 4458-4463DOI: 10.1021/acs.jpclett.6b01874
DS Docta Complutense
RD 7 oct 2024