LIF FTS : A POWERFUL TOOL FOR THE SPECTROSCOPY OF TWO HEAVY MOLECULES Rb2 and CS2

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LIF FTS : A POWERFUL TOOL FOR THE

SPECTROSCOPY OF TWO HEAVY MOLECULES Rb2 and CS2

C. Amiot, J. Vergès

To cite this version:

C. Amiot, J. Vergès. LIF FTS : A POWERFUL TOOL FOR THE SPECTROSCOPY OF TWO

HEAVY MOLECULES Rb2 and CS2. Journal de Physique Colloques, 1987, 48 (C7), pp.C2-690-C2-

690. �10.1051/jphyscol:19877170�. �jpa-00226994�

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JOURNAL DE PHYSIQUE

Colloque C7, suppl6ment au n012, Tome 48, dhcembre 1987

LIF FTS : A POWERFUL TOOL FOR THE SPECTROSCOPY OF TWO HEAVY MOLECULES Rb, and CS,

C. AMIOT and J. V E R G ~ S

Laboratoire Aim6 Cotton, B a t . 505. Campus d'Orsay, F-91405 Orsay Cedex, France

F l u o r e s c e n c e i n t h e Rb, a n d Cs, molecules was i n d u c e d by e i f f e r e n t l a s e r s : ~ r + a n d ~ r + i o n l a s e r s a n d v a r i o u s dye l a s e r s . T h e f l u o r e s c e n c e s p e c t r a were r e c o r d e d a t high r e s o l u t i o n (5 t o 1 5 1 0 - ~ c m - ' ) by F o u r i e r t r a n s f o r m spec- t r o s c o p y b o t h i n t h e visible a n d i n t h e n e a r i n f r a r e d p a r t of t h e s p e c t r u m .

T h e f i n e a n a l y s i s of t h e s p e c t r a l e d t o t h e discovery o r t o t h e i m proved knowledge of m a n y e x c i t e d e l e c t r o n i c states. I n Cs, t h e f 0110 wing s t a t e s were c h a r a c t e r i z e d : A '2: a f t e r e x c i t a t i o n with t h e 1.09um ~ r ' l i n e , (2)

'

^{2+g, (1)} ^{I n g ,} (3)

'

^{2+g, D}' E L a n d E

'

²^:

.

^A t r i p l e t state. (1 ) 'I+ was a l s o

g

'

p u t i n e v i d e n c e t h r o u g h a t r a n s i t i o n i s s u e d f r o m a p e r t u r b e d D ' E L l e v e l . I n Rb, f i v e e l e c t r o n i c s t a t e s were d e t e c t e d (2) : X '2;. 6

'nu.

(1) 'lg. (2)

'E;

a n d C1nu. Very high v i b r a t i o n a l l e v e l s (v>100) were o b s e r v e d i n t h e X '1; a n d (1) 'IIg s t a t e s , allowing a n a c c u r a t e d e t e r m i n a t i o n o f t h e dissociation limits.

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Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19877170