MICROWAVE OPTICAL DOUBLE RESONANCE OF $NH_{2}$
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Date
1977
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Ohio State University
Abstract
We have observed some interesting microwave transitions in $NH_{2}$ using microwave optical double resonance (MODR) with dye laser excited fluorescence detection. In the $\tilde{X}^{2}B_{1}$ state, the transitions $3_{31}\leftarrow 4_{13}, J = 7/2 \leftarrow J = 7/2$ and $J = 7/2 \leftarrow J = 9/2$ at 5.3 GHz and 11.6 GHz, respectively have been observed. These transitions are allowed only because of the interaction between $3_{31}, J = 7/2$ and $4_{13}, J = 7/2$ through matrix elements of the spin rotation Hamiltonian both diagonal in K and off-diagonal by 2 in K, The adequacy of the Hamiltonian used to fit the centrifugal distortion effects in the spin rotation interaction will be discussed. Finally, the electric dipole allowed rovibronic transitions, (tentatively assigned as) $\tilde{X}^{2}B_{1} (0,12,0), 2_{20} \leftarrow A^{2}A_{1} \Pi(0,10,0) 1_{10}, J = 3/2 \leftarrow J = 3/2$ and $J = 3/2 \leftarrow 1/2$ at 15.7 GHz and 6.3 GHz, respectively, will be discussed. Several approaches to assigning these transitions and, consequently, to determining the energy level pattern for $2_{20}, J = 3/2$, will be presented.
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Author Institution: Department of Chemistry, Rice University