scholarly journals Novel patterns of torsion-inversion-rotation energy levels in the ν11 asymmetric CH-stretch spectrum of methylamine

2013 ◽  
Vol 138 (10) ◽  
pp. 104305 ◽  
Author(s):  
Mahesh B. Dawadi ◽  
C. Michael Lindsay ◽  
Andrei Chirokolava ◽  
David S. Perry ◽  
Li-Hong Xu
Keyword(s):  
Energy Levels ◽  
Rotation Energy

The Δk = ±2 "forbidden band" and inversion–rotation energy levels of ammonia

1984 ◽  
Vol 62 (12) ◽  
pp. 1775-1791 ◽  
Author(s):  
Š. Urban ◽  
Romola D'cunha ◽  
K. Narahari Rao ◽  
D. Papoušek
Keyword(s):  
Quantum Number ◽  
State Energy ◽  
Energy Levels ◽  
Data Set ◽  
Quantum Numbers ◽  
Forbidden Transitions ◽  
Fourier Transform Spectra ◽  
The Fourier Transform ◽  
And Inversion ◽  
Rotation Energy

An entire band of perturbation allowed transitions to the ν4 state of 14NH3 has been assigned in the Fourier transform spectra recorded using a 192-m path length. More than 900 of the forbidden transitions provide necessary information on the spacing between the energy levels with different quantum numbers k, inaccessible from allowed transitions. These data were combined with all other relevant data (MW, submillimetrewave, FIR, IR) published in the literature to derive precise values of inversion–rotation energy levels. This extensive data set completely describes the ground state energy levels of 14NH3 up to quantum number J = 16 for all possible values of the quantum number k.

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