A spectroscopic study of the ¹⁴NH radical in vibrationally excited levels of the X ³Σ^- state by far-infrared laser magnetic resonance

Andrew Robinson (1) , John M. Brown (1) , Jesus Flores-Mijangos (2) , Lyndon Zink (3) , Michael Jackson (4)

1 Physical and Theoretical Chemistry Laboratory
2 Instituto de Ciencias Nucleares [Mexico]
3 Department of Physics
4 Department of Physics

Rotational transitions of vibrationally excited ¹⁴NH (υ = 1 and 2) in the ground X ³Σ^- electronic state have been detected by far-infrared laser magnetic resonance. The first four rotational intervals were investigated (N = 1 ← 0, 2 ← 1, 3 ← 2, and 4 ← 3) with a total of 17 far-infrared laser lines ranging in wavelength from 81.1 to 373.6 μm. For some rotational intervals, transitions between all components of the Zeeman manifolds were observed. An effective Hamiltonian was used to model the experimental measurements. The magnetic hyperfine parameters have been determined for the first time for the υ = 2 level and have been significantly improved for the υ = 1 level. In addition, the rotational, centrifugal distortion, spin-spin, spin-rotation, and Zeeman parameters have all been experimentally determined for the υ = 1 and 2 levels of ¹⁴NH.

Mots clés: Physical Sciences

Andrew Robinson, John M. Brown, Jesus Flores-Mijangos, Lyndon Zink, Michael Jackson. A spectroscopic study of the ¹⁴NH radical in vibrationally excited levels of the X ³Σ^- state by far-infrared laser magnetic resonance. Molecular Physics, 2007, 105 (05-07), pp.639-662. ⟨10.1080/00268970601162085⟩. ⟨hal-00513074⟩