TY  - JOUR
AU  - Tikhonov, Denis
AU  - Garg, Diksha
AU  - Schnell, Melanie
TI  - Inverse problems in pump-probe spectroscopy
JO  - Photochem
VL  - 4
IS  - 1
SN  - 2673-7256
CY  - Basel, Switzerland
PB  - MDPI
M1  - PUBDB-2024-00101
SP  - 57-110
PY  - 2024
AB  - Ultrafast pump-probe spectroscopic studies allow for deep insights into the mechanisms and timescales of photophysical and photochemical processes. Extracting valuable information from these studies, such as reactive intermediates’ lifetimes and coherent oscillation frequencies, is an example of the inverse problems of chemical kinetics. This article describes a consistent approach for solving this inverse problem that avoids the common obstacles of simple least-squares fitting that can lead to unreliable results. The presented approach is based on the regularized Markov Chain Monte Carlo sampling for the strongly nonlinear parameters, allowing for a straightforward solution of the ill-posed nonlinear inverse problem. The software to implement the described fitting routine is introduced and the numerical examples of its application are given. We will also touch on criticalexperimental parameters, such as the temporal overlap of pulses and cross-correlation time and their connection to the minimal reachable time resolution.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001268541300001
DO  - DOI:10.3390/photochem4010005
UR  - https://bib-pubdb1.desy.de/record/601075
ER  -