https://doi.org/10.1140/epjd/e2020-10340-0
Regular Article
Production of PAH cations with narrow internal energy distribution using single nanosecond pulsed laser
1
Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, Kerala, India
2
Government College, Karyavattom, University of Kerala, Thiruvananthapuram 695581, Kerala, India
a e-mail: vinithamvv@gmail.com
Received:
16
June
2020
Received in final form:
28
July
2020
Accepted:
9
September
2020
Published online:
1
November
2020
The internal energy dynamics of three examples of PAHs are probed using a high resolution energy time of flight spectrometer. The measured H-loss rates are converted to internal energy values for a range of UV photon wavelengths. Multi step multi photon absorption scheme is proposed to estimate the possible internal energy values with reasonable accuracies. This was possible because of the ultrafast radiationless internal conversion process in PAHs and their structural rigidity. Thus, a method is proposed to produce PAH cations with narrow and known internal energy distribution using a single nanosecond pulsed laser, paving a way to study statistical unimolecular decay in PAHs very efficiently.
Key words: Molecular Physics and Chemical Physics
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2020
