The hyperfine Λ-doubling spectrum of 14N16O and 15N16O

Abstract The molecular beam electric resonance method was used for the investigation of the hyperfine Λ-doubling transitions ΔJ = 0, ΔF = 0, ±1 for a number of J values of both the 2II1/2 and the 2II3/2 states of the molecules 14N16O and 15N16O. The observed spectrum is explained using the degenerate perturbation theory introduced by Freed (1). This theory is adapted for a 2II molecule and includes contributions up to third order in fine and hyperfine structure. The agreement between observed and calculated values is satisfactory.

[1]  J. V. Vleck.  On sigma-Type Doubling and Electron Spin in the Spectra of Diatomic Molecules , 1929 .

[2]  M. Mizushima,et al.  Theory of the Hyperfine Structure of the NO Molecule. II. Errata and Some Additional Discussion , 1955 .

[3]  R. Frosch,et al.  Magnetic Hyperfine Structure in Diatomic Molecules , 1952 .

[4]  Van Vleck.  The Theory of the Magnetic Quenching of Iodine Fluorescence and of Λ-Doubling in 3 Π 0 States , 1932 .

[5]  T. M. Sanders,et al.  Microwave Spectra of the Free Radicals OH and OD , 1955 .

[6]  D. Lepard.  Theoretical calculations of electronic Raman effects of the NO and O2 molecules , 1970 .

[7]  Jon T. Hougen,et al.  Classification of Rotational Energy Levels for Symmetric‐Top Molecules , 1962 .

[8]  J. T. Hougen,et al.  Classification of Rotational Energy Levels. II , 1963 .

[9]  J. Gallagher,et al.  Uncoupling Effects in the Microwave Spectrum of Nitric Oxide , 1956 .

[10]  Richard M. Neumann,et al.  High-Precision Radiofrequency Spectrum of ^{14}N ^{16}O , 1970 .

[11]  K. Freed.  Theory of the Hyperfine Structure of Molecules: Application to 3Π States of Diatomic Molecules Intermediate between Hund's Cases (a) and (b) , 1966 .

[12]  H. Radford,et al.  L-Uncoupling Effects on the Electron-Paramagnetic-Resonance Spectra of N 14 O 16 and N 15 O 16 , 1966 .

[13]  T. C. James,et al.  Spin—Orbit Coupling Constant of Nitric Oxide. Determination from Fundamental and Satellite Band Origins , 1964 .

[14]  W. Gordy,et al.  Millimeter-Wave Rotational Spectrum of NO in theπ322State , 1959 .

[15]  J. Hougen,et al.  ROTATIONAL ENERGY LEVELS OF STATES AND INTENSITIES IN TRANSITIONS: APPLICATIONS TO SOME HEAVIER HYDRIDES , 1967 .