Quantum beats in cyanogen from singlet/singlet and singlet/triplet superposition states

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.471333· OSTI ID:279897

Hemmi, N; Cool, T A ^[1]

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1. School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853 (United States)

Fluorescence quantum beats, observed among hyperfine substates of the {ital N}=8, 10, 15, 18, 19, 22, and 38 rotational levels of the 4{sup 1}{tilde {ital A}}({sup 1}{Sigma}{sup {minus}}{sub {ital u}}) state of C{sub 2}N{sub 2}, are discussed. The Zeeman splittings of some beats, for {ital N}=8, 19, and 22, are too small to arise from the spin{endash}orbit coupling of a singlet/triplet pair of states, and are attributed to singlet/singlet interactions. A simple two-state singlet/triplet model, successfully used for a previous analysis of beats from {ital N}=12, accurately accounts for magnetic modulations observed for beats from the {ital N}=8 and {ital N}=18 rotational states. {copyright} {ital 1996 American Institute of Physics.}

• DOE Contract Number: FG02-86ER13508
• OSTI ID: 279897
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 15 Vol. 104; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING
CYANOGEN
FLUORESCENCE
HYPERFINE STRUCTURE
MODULATION
ORBITS
ROTATIONAL STATES
SPIN
ZEEMAN EFFECT