Lifetimes in the A 0u+ state of 130Te2

✍ Scribed by R.S. Ferber; M.Ya. Tamanis

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 181 KB
• Volume: 98
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(83)80245-0

✦ Synopsis

Lifetime measurements have been performed for two vibrotational levels of the A 0: states of the 13'Tez molecule. CCcited by the 496.5 nm Ar*-laser line. Deactivation cross sections for Tez-Tez collisions have been determined. In our previous paper [l] lifetime measurement results have been reported for four vibrotational levels in the B 0: state of the l3 0Te2 molecule, excited by 488.0 and 496.5 nm Ar*-laser lines, as well as of one level in the A 0: state excited at 514.5 nm *_ The main result obtained was the fact that the lifetime for the (II' = 11, J' = 53) A 0: state, equalling 670 ns, exceeds by about an order of magnitude those of B 0: levels with u' = 0, 1,3, lying between 54 and 73 ns (levels were identified according to refs_ [2,3])_ However, quite recently results have been published [4] containing data on lifetime measurements for four I;, J' levels of the A 0: state with u' = 16 and 17, yielding r values between 62 and 71 ns, the levels being non-perturbed, according to the authors of ref. [4]_ We consider it of interest, in this connection, to report on additional r measurements for 1 3oTe2 in A 0: state. The assembly employed was that used for measuring kinetics of laser-induced fluorescence (LIF), described in ref. [l] _ The LIF spectrum of 1 3 OTe, excited by the 496.5 mn line showed that at TEM,,>peration and at a current of ~25 A through the laser tube (amplification contour a10 GHz) in addition to the progression from (0,107) B 0;) mentioned in ref. [2], other doublet progressions could be observed, as shown in * There has been a flaw in the setting of table 1 in our previous paper [l] _ As clearly follows from the text of that ar-