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Publications Influence

The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules

- J. T. Hougen
- Chemistry
- 1 June 1970

Report describing procedures for making quantum mechanical calculations of rotational energy levels and rotational line intensities in diatomic molecules. The procedures are illustrated by sample… Expand

206 6- PDF

Recommended conventions for defining transition moments and intensity factors in diatomic molecular spectra

- E. Whiting, A. Schadee, J. Tatum, J. T. Hougen, R. W. Nicholls
- Physics
- 1 April 1980

Two recommendations are made that can eliminate persistent confusion in the study of diatomic spectroscopy by providing uniform and consistent definitions of the electronic transition moments and the… Expand

164 3

A fitting program for molecules with two equivalent methyl tops and C2v point-group symmetry at equilibrium: Application to existing microwave, millimeter, and sub-millimeter wave measurements of…

- V. Ilyushin, J. T. Hougen
- Physics
- 1 July 2013

Author Institution: Institute of Radio Astronomy of NASU, Chervonoproporna 4, 61002 Kharkov, Ukraine. NIST Guest Worker June - August 2009.; Sensor Science Division, National Institute of Standards… Expand

21 3- PDF

Classification of Rotational Energy Levels for Symmetric‐Top Molecules

- J. T. Hougen
- Chemistry
- 1 October 1962

It is shown that the rotational energy levels of a symmetric‐top molecule can be classified according to symmetry species of the full symmetry group of the molecule. Useful selection rules for… Expand

322 2

Analysis and fit of the Fourier-transform microwave spectrum of the two-top molecule N-methylacetamide

- N. Ohashi, J. T. Hougen, +4 authors J. Pyka
- Physics
- 1 September 2004

Abstract The jet-cooled Fourier-transform microwave spectrum of N-methylacetamide (CH3NHC(O)CH3), a molecule containing two methyl tops with relatively low barriers to internal rotation, has been… Expand

52 2

A GROUP-THEORETICAL TREATMENT OF ELECTRONIC, VIBRATIONAL, TORSIONAL, AND ROTATIONAL MOTIONS IN THE DIMETHYLACETYLENE MOLECULE*

- J. T. Hougen
- Physics
- 1 October 1964

The Hamiltonian for the dimethylacetylene molecule is expressed in terms of a set of coordinates which allow a separation of the molecular wave function into an electronic part, a vibrational part, a… Expand

110 2

PERTURBATIONS IN THE VIBRATION-ROTATION-TORSION ENERGY LEVELS OF AN ETHANE MOLECULE EXHIBITING INTERNAL ROTATION SPLITTINGS

- J. T. Hougen
- Chemistry
- 11 November 1980

5 2

THE CALCULATION OF ROTATIONAL ENERGY LEVELS USING TUNNELING HAMILTONIANS

- J. T. Hougen
- Physics
- 2009

5 2- PDF

The vibration-rotation problem in triatomic molecules allowing for a large-amplitude bending vibration

- J. T. Hougen, P. R. Bunker, J. Johns
- Physics
- 1 April 1970

Abstract In this paper we derive an expression for the vibration-rotation Hamiltonian of a triatomic molecule. In the derivation we use a curvilinear bending coordinate and two rectilinear stretching… Expand

496 1

ANOMALOUS ROTATIONAL LINE INTENSITIES IN ELECTRONIC TRANSITIONS OF POLYATOMIC MOLECULES: AXIS-SWITCHING

- J. T. Hougen, J. Watson
- Physics
- 1 February 1965

It is convenient when performing calculations on a vibrating and rotating molecule to define an axis system which is somehow fixed to the molecule. The orientation of the usual molecule-fixed axis… Expand

227 1