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  4. Excitation of Sodium Atoms Attached to Helium Nanodroplets: The 3p <-- 3s Transition Revisited
 
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research article

Excitation of Sodium Atoms Attached to Helium Nanodroplets: The 3p <-- 3s Transition Revisited

Loginov, Evgeniy  
•
Hernando de Castro, Alberto  
•
Beswick, J. Albert
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2015
The Journal of Physical Chemistry A

The dynamics of Na atoms on the surface of helium nanodroplets following excitation via the 3p <-- 3s transition has been investigated using state-specific ion-based detection of the products. Excitation of the system to the 3p 2Pi states is found to lead to the desorption of both bare Na and NaHe exciplexes. The associated speed distributions point to an impulsive desorption process for Na products and a thermally driven process for the NaHe exciplexes. In contrast, excitation of the 3p 2Sigma state leads exclusively to the impulsive desorption of Na atoms. In this case the desorption is accompanied by a helium-induced relaxation process, as evidenced by the large fraction of detected Na 2P1/2 atoms. The relaxation process is thought to be related a crossing between the 2Pi1/2 and 2Sigma potential energy curves at large distance

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Type
research article
DOI
10.1021/jp511885t
Web of Science ID

WOS:000356317300016

Author(s)
Loginov, Evgeniy  
•
Hernando de Castro, Alberto  
•
Beswick, J. Albert
•
Halberstadt, Nadine
•
Drabbels, Marcel  
Date Issued

2015

Publisher

American Chemical Society

Published in
The Journal of Physical Chemistry A
Volume

119

Issue

23

Article Number

6033

Subjects

spectroscopy

•

dynamics

•

desorption

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCPM  
Available on Infoscience
January 9, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/110189
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