High-resolution laser spectroscopy and magnetic effect of the B{sup ~2}E′ ← X{sup ~2}A{sub 2}′ transition of {sup 14}NO{sub 3} radical

Journal Article · Fri Nov 14 04:00:00 EST 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4901019· OSTI ID:22415353

Tada, Kohei; Kashihara, Wataru ^[1]; Baba, Masaaki ^[2]; Ishiwata, Takashi ^[3]; Hirota, Eizi ^[4]; Kasahara, Shunji ^[1]

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1. Graduate School of Science, Kobe University, Kobe 657-8501 (Japan)
2. Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
3. Graduate School of Information Sciences, Hiroshima City University, Hiroshima 731-3194 (Japan)
4. The Graduate University for Advanced Studies, Kanagawa 240-0193 (Japan)

Rotationally resolved high-resolution fluorescence excitation spectra of {sup 14}NO{sub 3} radical have been observed for the 662 nm band, which is assigned as the 0–0 band of the B{sup ~2}E′ ←X{sup ~2}A{sub 2}′ transition, by crossing a single-mode laser beam perpendicularly to a collimated molecular beam. More than 3000 rotational lines were detected in 15 070–15 145 cm{sup −1} region, but it is difficult to find the rotational line series. Remarkable rotational line pairs, whose interval is about 0.0246 cm{sup −1}, were found in the observed spectrum. This interval is the same amount with the spin-rotation splitting of the X{sup ~2}A{sub 2}′ (υ = 0, k = 0, N = 1) level. From this interval and the observed Zeeman splitting up to 360 G, seven line pairs were assigned as the transitions to the {sup 2}E′{sub 3/2} (J′ = 1.5) levels and 15 line pairs were assigned as the transitions to the {sup 2}E′{sub 1/2} (J′ = 0.5) levels. From the rotational analysis, we recognized that the {sup 2}E′ state splits into {sup 2}E′{sub 3/2} and {sup 2}E′{sub 1/2} by the spin-orbit interaction and the effective spin-orbit interaction constant was roughly estimated as –21 cm{sup −1}. From the number of the rotational line pairs, we concluded that the complicated rotational structure of this 662 nm band of {sup 14}NO{sub 3} mainly owes to the vibronic interaction between the B{sup ~2}E′ state and the dark A{sup ~2}E″ state through the a{sub 2}″ symmetry vibrational mode.

• OSTI ID: 22415353
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 18 Vol. 141; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
EXCITATION
FLUORESCENCE
INTERACTIONS
L-S COUPLING
LASER SPECTROSCOPY
MOLECULAR BEAMS
RADICALS
RESOLUTION
ROTATION
SPECTRA
SPIN
ZEEMAN EFFECT