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Formation of coherent rotational wavepackets in small molecule-helium clusters using impulsive alignment

Formation of coherent rotational wavepackets in small molecule-helium clusters using impulsive alignment
Formation of coherent rotational wavepackets in small molecule-helium clusters using impulsive alignment
We show that rotational line spectra of molecular clusters with near zero permanent dipole moments can be observed using impulsive alignment. Aligned rotational wavepackets were generated by non-resonant interaction with intense femtosecond laser pump pulses and then probed using Coulomb explosion by a second, timedelayed femtosecond laser pulse. By means of a Fourier transform a rich spectrum of rotational eigenstates was derived. For the smallest cluster, C2H2–He, we were able to establish essentially all rotational eigenstates up to the dissociation threshold on the basis of theoretical level predictions. 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.
0301-7249
1-24
Galinis, G.
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Mendoza Luna, L.G.
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Watkins, M.J.
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Ellis, A.M.
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Minns, R.S.
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Mladenovic, M.
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Lewerenz, M.
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Champam, R.T.
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Turcu, I.C.E
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Cacho, C.
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Springate, E.
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Kazak, L.
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Gode, S
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Irsig, R.
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Skruszewicz, S.
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Tiggesbaumker, J
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Meiwes-Broer, K.H.
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Rouzee, A.
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Underwood, J.G.
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Siano, M
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von Haeften, K.
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Galinis, G.
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Mendoza Luna, L.G.
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Watkins, M.J.
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Ellis, A.M.
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Minns, R.S.
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Mladenovic, M.
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Lewerenz, M.
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Champam, R.T.
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Turcu, I.C.E
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Cacho, C.
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Springate, E.
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Kazak, L.
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Gode, S
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Irsig, R.
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Skruszewicz, S.
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Tiggesbaumker, J
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Meiwes-Broer, K.H.
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Rouzee, A.
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Underwood, J.G.
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Siano, M
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von Haeften, K.
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Galinis, G., Mendoza Luna, L.G. and Watkins, M.J. et al. (2014) Formation of coherent rotational wavepackets in small molecule-helium clusters using impulsive alignment. Faraday Discussions, 1-24. (doi:10.1039/C4FD00099D).

Record type: Article

Abstract

We show that rotational line spectra of molecular clusters with near zero permanent dipole moments can be observed using impulsive alignment. Aligned rotational wavepackets were generated by non-resonant interaction with intense femtosecond laser pump pulses and then probed using Coulomb explosion by a second, timedelayed femtosecond laser pulse. By means of a Fourier transform a rich spectrum of rotational eigenstates was derived. For the smallest cluster, C2H2–He, we were able to establish essentially all rotational eigenstates up to the dissociation threshold on the basis of theoretical level predictions. 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.

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e-pub ahead of print date: August 2014
Organisations: Chemistry

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Local EPrints ID: 367109
URI: http://eprints.soton.ac.uk/id/eprint/367109
ISSN: 0301-7249
PURE UUID: ef176463-bb59-4d6a-af8d-b8cc95b2ce0f
ORCID for R.S. Minns: ORCID iD orcid.org/0000-0001-6775-2977

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Date deposited: 18 Aug 2014 11:51
Last modified: 03 Dec 2019 01:39

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Contributors

Author: G. Galinis
Author: L.G. Mendoza Luna
Author: M.J. Watkins
Author: A.M. Ellis
Author: R.S. Minns ORCID iD
Author: M. Mladenovic
Author: M. Lewerenz
Author: R.T. Champam
Author: I.C.E Turcu
Author: C. Cacho
Author: E. Springate
Author: L. Kazak
Author: S Gode
Author: R. Irsig
Author: S. Skruszewicz
Author: J Tiggesbaumker
Author: K.H. Meiwes-Broer
Author: A. Rouzee
Author: J.G. Underwood
Author: M Siano
Author: K. von Haeften

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