Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Ro-vibrational spectra of C2H2based on variational nuclear motion calculations

Journal Article · · Molecular Physics

A published ab initio-based potential energy surface and newly constructed dipole moment surface of acetylene have been used to compute vibrational band intensities. The line intensity calculations employed the variational nuclear motion code WAVR4 for computation of wave functions and energy levels, and a newly developed code DIPOLE4 for computation of dipole transitions. Owing to the high computational cost of J>0 transitions using direct variational methods only J=0 and J=1 states and transitions have been computed variationally. The intensities of J>1 transitions were extrapolated from J=0 and J=1 using Honl-London coefficients. The resulting effective rotational constants B and transition intensities are compared with experimental data for the (3 nu(4)+nu(5)) combination band, the nu(3) and the nu(5) fundamental band. The prospects of using this procedure for extensive calculations of a hot line list, important for cool stars and extrasolar planets are discussed.

Research Organization:
Emory Univ., Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
DOE Contract Number:
FG02-07ER54914
OSTI ID:
1124182
Report Number(s):
DOE-Emory-DE-FG02-07ER54914-05; 5-22145
Journal Information:
Molecular Physics, Journal Name: Molecular Physics Journal Issue: 15 Vol. 108; ISSN 0026-8976
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English

References (59)

The Magma Algebra System I: The User Language journal September 1997
The vinylidene-acetylene rearrangement. A self-consistent electron pairs study of a model unimolecular reaction journal March 1978
Line intensities of acetylene: Measurements in the 2.5-μm spectral region and global modeling in the and 6 series journal February 2007
Line parameters of acetylene in the 1.9 and 1.7μm spectral regions journal July 2008
Line intensities of hot bands in the spectral region of acetylene 12C2H2 journal April 2001
The a b i n i t i o calculation of the vibrational‐rotational spectrum of triatomic systems in the close‐coupling approach, with KCN and H 2 Ne as examples journal October 1982
A multispectrum fitting procedure to deduce molecular line parameters: Application to the 3-0 band of 12C 16O journal April 2001
Infrared absorption by acetylene in the 12–14 μm region at low temperatures journal December 1983
Jupiter: Identification of ethane and acetylene journal January 1974
Permutationally invariant potential energy surfaces in high dimensionality journal October 2009
Potential models and local mode vibrational eigenvalue calculations for acetylene journal December 1982
A scaled ab initio potential energy surface for acetylene and vinylidene journal August 2003
Identification of acetylene (C2H2) in infrared atmospheric absorbtion spectra journal December 1981
Line intensities in the ν5 band of acetylene 12C2H2 journal December 2000
An infrared study of the bending region of acetylene journal April 1991
Infrared Transition Intensities for Water: A Comparison of ab-Initio and Fitted Dipole Moment Surfaces journal February 1995
A high-accuracy computed water line list journal April 2006
New vibration–rotation code for tetraatomic molecules exhibiting wide-amplitude motion: WAVR4 journal November 2004
�ber die Intensit�ten der Bandenlinien journal September 1925
Acetylene bands observed in carbon stars - A laboratory study and an illustrative example of its application to IRC plus 10216 journal August 1982
DVR3D: for the fully pointwise calculation of ro-vibrational spectra of triatomic molecules journal April 1995
The geometry and forcefield of acetylene journal March 2002
The HITRAN 2008 molecular spectroscopic database journal June 2009
Infrared transition intensities in acetylene: An algebraic approach journal February 1999
DVR3D: a program suite for the calculation of rotation–vibration spectra of triatomic molecules journal November 2004
Efficient calculation of rovibrational eigenstates of sequentially bonded four-atom molecules journal January 1993
Spectra of carbon-rich asymptotic giant branch stars between 0.5 and 2.5 μ m: Theory meets observation journal June 2001
A potential energy surface for the ground state of acetylene, H 2 C 2 ( [Xtilde] 1 Σ g + ) journal September 1980
MULTIMODE: A code to calculate rovibrational energies of polyatomic molecules journal July 2003
The HITRAN database: 1986 edition journal January 1987
Computational Invariant Theory book January 2002
Ab initio potential energy and dipole moment surfaces for H5O2+ journal January 2005
Calculating energy levels of isomerizing tetra-atomic molecules. II. The vibrational states of acetylene and vinylidene journal February 2005
The HITRAN 2004 molecular spectroscopic database journal December 2005
The identification of HCN and HNC in carbon stars: model atmospheres, synthetic spectra and fits to observations in the 2.7-4.0 mum region journal October 2003
The IR acetylene spectrum in HITRAN: update and new results journal November 2003
Acetylene at the Threshold of Isomerization journal April 2000
The [ITAL]ISO[/ITAL]/SWS Spectrum of IRC +10216: The Vibrational Bands of C[TINF]2[/TINF]H[TINF]2[/TINF] and HCN journal November 1999
A purely ab initio spectroscopic quality quartic force field for acetylene journal January 1998
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Local mode behavior in the acetylene bending system journal January 1999
A line list of allowed and forbidden rotational transition intensities for water journal May 2008
Rovibrational Hamiltonians for general polyatomic molecules in spherical polar parametrization. I. Orthogonal representations journal January 2000
Line intensities of acetylene in the 3-m region: New measurements of weak hot bands and global fitting journal January 2006
A new ab initio potential energy surface describing acetylene/vinylidene isomerization journal January 2003
Full-dimensionality quantum calculations of acetylene–vinylidene isomerization journal June 2003
A new ab initio ground-state dipole moment surface for the water molecule journal January 2008
Multispectrum fitting of line parameters for 12C2H2 in the 3.8-μm spectral region journal February 2007
A 3000K laboratory emission spectrum of water journal February 2005
Vibrational Spectroscopic Database on Acetylene, X̃ 1Σg+ (12C2H2, 12C2D2, and 13C2H2) journal September 2003
Improved HCN/HNC linelist, model atmospheres and synthetic spectra for WZ Cas journal March 2006
Line intensities of acetylene at journal May 2005
New generalized gradient approximation functionals journal January 2000
A Variationally Computed T = 300 K Line List for NH 3 journal July 2009
On the use of variational wavefunctions in calculating vibrational band intensities journal August 1992
Full dimensionality quantum calculations of acetylene/vinylidene isomerization journal September 2002
Molecular line lists for modelling the opacity of cool stars journal March 2007
Ab initio modeling of molecular IR spectra of astrophysical interest: application to CH 4 journal January 2009
Some Studies Concerning Rotating Axes and Polyatomic Molecules journal April 1935

Similar Records

Ab-Initio-Based Potential Energy Surfaces for Complex Molecules and Molecular Complexes
Journal Article · Thu Jun 03 00:00:00 EDT 2010 · Journal of Physical Chemistry Letters · OSTI ID:1124181

Theoretical rotation-vibration spectrum of thioformaldehyde
Journal Article · Wed Nov 27 23:00:00 EST 2013 · Journal of Chemical Physics · OSTI ID:22251336

Diode laser measurements of self-broadening coefficients in the [nu][sub 5] band of C[sub 2]H[sub 2] at low temperature
Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of Molecular Spectroscopy; (United States) · OSTI ID:7043378