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Radiationless transitions in the presence of a weak magnetic field: glyoxal

✍ Scribed by H.G. Küttner; H.L. Selzle; E.W. Schlag

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
482 KB
Volume
48
Category
Article
ISSN
0009-2614

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✦ Synopsis

Intcrcystcm crossing m rl wcdk magnetic f~cld m gaseous glyo~l was studxd. I-luorescencc quenching IS ob~rvcd at v.uiou\ pressures with dllfercnt coihr~~n pdrtncrc as a tunction of the magnetic tlcld. Tlmc resolved emiccion \pcctrz and cmlssion curitation Fpcctra were ob\ervcd and qucnAng rate constants wcrc dctcrmmed by messurmp lluorcsccnce Ilfctmic as il tunctlon of quench ga\ prc\surc with and wlthout 3 magnetic field. l%orc\ccncc mtcncity and lifetmlc wcru sanncd versus m.lgnctic field .lt vnrlous pressures The collision free fluorccccncc hfctimc 1s found to be unaffected by the prcencc of ,I mgmctic field. The magnctlc field cffcct 1s only observed in the prcsencr: of colltdzrc. This elXxt Jt 200 mtorr lc~ds to rl reduction of 20% on both fluorcsccncc Irfctunc and intcmlty when ;1 mdgnctic field ot about 1 kG is switched on. The ctfcct saturates at a field ctrcngth of 1 kG The magnct~c field 1s seen JS an cnh.mccmcnt of mttxsystcm crossing. .md wdcncc IS prcwntcd that colhsionr do not effect mtcrsystcm crossmg but merely transfer cncrpy, in elthcr a singIet or a triplet manifold.

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