The chemical production of electronically excited states in the H/NF2 system

✍ Scribed by J.M. Herbelin; N. Cohen

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 447 KB
• Volume: 20
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(73)80512-3

✦ Synopsis

A mixture of NF3 and Ar is passed through an rf discharge in a flowAystern to product, among other species, F and NFz. When Ha, D?;, or CH? are added downstream, reactions with F atoms poduce vibratiomlly esci:ed HI:

or DF together with H, D, or CHJ. The latter free radicais can react with NF2, probably by an climktion reaction to produce electronically excited NF:

A vibrational-to-electronic energy tmnsfer process between the products of this reaction then produces the next higher state of NF:

A similar transfer process has also been found between the electronically excited a1 A states of 02 and NF: O*(a'A)+ W(a*A)-Ot(X3.Z3 + NF(blZ+) .

The H or D atoms but not the CI-13 radicals are then found to react with either NF(a 'A) or NF(X38_) to produce electronically excited N(*D) atoms, which In turn react with the NF(a' A) molecules to produce N2(E3ng). The observed nitrogen firs! positive radiation has been demonstrated to be produced entirely by this reaction mechanism rather than by the N(4S) recambinntion tha.f accounts for the Rayleigh afterglow. In addition, the occurrence of the xenction N(2D) + N20 + NO(B2nr) + N2(X k;) has been veri5ed. Finally we have observed emission at 3344 A, which we attribute to the NF(A%I), which has not been previously reported.