N2 rotational energy distributions in cold, supersonic beams from electron excited fluorescence measurements of N+2

✍ Scribed by S.P. Hernandez; P.J. Dagdigian; J.P. Doering

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 308 KB
• Volume: 91
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(82)83311-3

✦ Synopsis

Ground

-state rotational cncrgy drstrlbutlons of N2 molcculcs produced m pure and tic-scedcd supcrsomc c\p.muons have been determined by mcasurcments of the N; firsl ncgatlve band rolatlonal hnc rntcnWxs produced by 800 eV clccrron Impact on cooled pure and Hc-sccdcd N2 supcrsomc beams Suffic~nt spectral rcsolullon W.IS employed IO resolve comlilclcly both P and R branchcsof the first ncgal~vc bands Rotdtlonal state chslrlbullons wcrc obtamcd 10 much h&x valucsol J than rn prcvlous mvcsuguons TIIC data show that 31 800 cV, the clcctrlc dlpolc selcct~on rule. IAJ I = I, IS cunslstcnt WIII the obscwcd Nf cmisslon bands and that Ihc relational cncrgy distributions prodwcd m IIIC cooled. supersonic beam arc non-Bohzmnnn wth a large population m the fist few rotatwnsl stales followed by 3 long. hlph-energy IA to quite high J values Recently, measurements of the N: first negative