Hyperfine quantum beats in C2N2

✍ Scribed by Jon Velazquez; Naoki Hemmi; Terrill A. Cool

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 570 KB
• Volume: 221
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)87013-6

✦ Synopsis

Molecular quantum beats are observed in the isotropic fluorescence decay following laser excitation of individual rotational states of CzNz via the vibronically allowed 4; A ( 'C; ) +g ( 'Cl ) transition near 2 19 nm. Strong quantum beats occur with selective excitation, by both P-and R-branch transitions, of over a dozen rotational states. Observations of hyperfine quantum beats following excitation of the N'= 12 rotational level yield estimates of spin-orbit coupling matrix elements, Born-Oppenheimer state separations, and magnetic and quadrupolar hypertine coupling constants. Observations of Zeeman splitting establish that the three hypertine levels of N'= 12 are coupled to those of a single triplet state.