Collisional quenching of the spin-orbit states of atomic tin, Sn(5p23P2) and Sn(5p23P1)

✍ Scribed by P.D. Foo; J.R. Wiesenfeld; D. Husain

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 686 KB
• Volume: 32
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(75)85211-0

✦ Synopsis

Abetic

study of gaseous tin atoms in the low lying spin-orbii stat& Sn(S$ "PI) and Sn(Sp' 'PI), respccrively, 0.210 and 0.425 eV above t$e Up ' 'P.0) electronic ground state, is presented. Tj~ese two optic& metz&bIe Sk&S, b gether with the 'PO bound state, were encrated by the pulsed irradiation of SnMe4 and monitored phctoelectridy in absorption by time-resolved attenuation of atomic resonance radiation. l3e f;-rst absoIute rate data for the coIlSod quenching of these two excited states by the gases Ar, HZ, DZ, 02 and SnMez are reported and compyed with the previously determined analogous &ta'for Pb(6pZ 3P,,z). The resulting absolute secondarder rate constants for both sets of spin-orbit states ark discussed within the framework of symmetry arguments based qn (I, f'0 couplQ. For the particular case of the quenchh of Pb(6 3P1) by 02, the kinetic behaviour'of both the 3Pi atld 3Po states seem to be fully consistent with the rapid establishment of an cquilibitim fcr the near resonant electronic enew exchange processes: Pb(6 3Pl) f 02(X3C$ G= Pb(6 3Po) + 02(2 'A& AE = 105 cm-I.