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Title: Ultrafast laser studies of molecules in helium clusters
Author: Galinis, Gediminas
ISNI:       0000 0004 5351 2106
Awarding Body: University of Leicester
Current Institution: University of Leicester
Date of Award: 2015
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We show that rotational line spectra of molecular clusters with near zero permanent dipole moments can be observed using impulsive alignment. Aligned rotational wave packets were generated by non-resonant interaction with intense femtosecond laser pump pulses and then probed using Coulomb explosion by a second, time-delayed femtosecond laser pulse. By means of a Fourier transform a rich spectrum of rotational eigenstates was derived. Guided by ab initio calculations for the smallest cluster comprising of a single acetylene molecule and a helium atom, essentially all rotational eigenstates up to the dissociation threshold could be established, providing a comprehensive picture of the rotational energy level structure. The C2H2-He complex is found to exhibit distinct features of large amplitude motion and very early onset of free internal rotor energy level structure.
Supervisor: von Haeften, Klaus; Ellis, Andrew Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available