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Optogalvanic spectra and predissociation of the c 3Πu state of H2 and D2

✍ Scribed by Yoshiyuki Kawashima

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
373 KB
Volume
168
Category
Article
ISSN
0009-2614

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✦ Synopsis

The optogalvanic spectrum and the emission spectrum of the highly excited Hz and Dz in a dc discharge have been investigated. Five bands of the triplet systems for Hz and D2 were observed in the region of 16130 to 17440 cm-': between the c 'II, state and the h 'Xl, g 'C: , i 'iI,, and j '4 states and between the a 'Z: state and the d "II, state. One component of the A-type doublets of the rotational lines was found to be very weak or missing in the optogalvanic signal of the transitions starting from the c 'II, state of Hz, in conformity with a previous report of the absorption spectrnm. It is thus concluded that the optogalvanic signal corresponds to the absorption spectrum and that the excitation of HL/DI from the metastable c "II. or a 'L: states leads to a decrease in the plasma impedance.

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