Oscillator strength and linewidth measurements of dipole-allowed transitions in 14N2 between 93.5 and 99.5 nm

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DOIResolve DOI: http://doi.org/10.1063/1.2134703
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TypeArticle
Journal titleThe Journal Of Chemical Physics
Volume123
Issue21
Pages214303-1214303-11; # of pages: 11
Subjectnitrogen; oscillator strengths; predissociation; radiative transfer; rotational states; Rydberg states; Schrodinger equation; spectral line breadth; spectral line intensity; vibrational states
AbstractLine oscillator strengths in 16 electric dipole-allowed bands of 14N2 in the 93.5�99.5 nm (106 950�100 500 cm�1) region have been measured at an instrumental resolution of 6.5�10�4 nm (0.7 cm�1). The transitions terminate on vibrational levels of the 3psigma 1Sigma<sub>u</sub><sup>+</sup>, 3ppi 1Piu, and 3ssigma 1Piu Rydberg states and of the b[prime] 1Sigma<sub>u</sub><sup>+</sup> and b 1Piu valence states. The J dependences of band f values derived from the experimental line f values are reported as polynomials in J[prime](J[prime]+1) and are extrapolated to J[prime]=0 in order to facilitate comparisons with results of coupled-Schr�dinger-equation calculations that do not take into account rotational interactions. Most bands in this study reveal a marked J dependence of the f values and/or display anomalous P-, Q- and R-branch intensity patterns. These patterns should help inform future spectroscopic models that incorporate rotational effects, and these are critical for the construction of realistic atmospheric radiative transfer models. Linewidth measurements are reported for four bands. Information provided by the J dependences of the experimental linewidths should be of use in the development of a more complete understanding of the predissociation mechanisms in N2.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12333623
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Record identifierb1f7844a-0ced-4a44-ae29-a62e5894c12c
Record created2009-09-10
Record modified2016-05-09
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