The High-Resolution Absorption Spectrum of Nitrogen from 1060 TO 1520 Å. I. The α^{1}Π_{g} <- Χ^{1}Σ_{g}^{+} System.

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view Abstract Citations (56) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The High-Resolution Absorption Spectrum of Nitrogen from 1060 TO 1520 Å. I. The α^{1}Π_{g} <- Χ^{1}Σ_{g}^{+} System. Vanderslice, Joseph T. ; Tilford, S. G. ; Wilkinson, P. G. Abstract The absorption spectrum of the LBH (Lyman-Birge-Hopfield) system (a 111g X +) of nitrogen has been obtained at high resolution in the fourth and fifth order of a 21-ft vacuum spectrograph in the region 1098-1450 A. Bands involving v" = 0, and V' = 1-15 have been analyzed. This transition is a weak one, permitted only by magnetic dipole and electric quadrupole selection rules. The molecular constants obtained for a 111g are T00 = 6895115 Y10( w ) = 1694.208 Y20( - ) = - l3.949i V20( #o,y,) = 7.9346 X 10-2 Y40( - co,z.) = 2.91i X 10- cm-2 Y01( B,) = 1.6169 Yn( - a) = -0017932 Y21( ) = -2 92 X 10- cm-1 r. = 1.2157 X 10-8 cm. A predissociation observed in emission above J = 12, V = 6 of a 111g is not observed in absorption, in agreement with the interpretation that the predissociation is a weak one involving interaction with + The S and 0 electric quadrupole branches (AJ = I 2) are approximately 21 the intensity of the stronger P-, Q-, and R-(AJ = I 1) (electric quadrupole plus magnetic dipole) branches. The combination defect is quite negligible below J = 30 within experimental error ( 0.04 cm-1) The agreement with Raman data on the ground state, X +, is excellent, giving combined preferred results: B6,, = 1.9896 D0,, 5.80 X 10 . Publication: The Astrophysical Journal Pub Date: February 1965 DOI: 10.1086/148134 Bibcode: 1965ApJ...141..395V full text sources ADS | Related Materials (4) Part 2: 1965ApJ...141..427T Part 3: 1965ApJ...141.1226T Part 4: 1965ApJ...142...84V Part 5: 1965ApJ...142.1203T