scholarly journals FOURIER-TRANSFORM MICROWAVE AND MILLIMETERWAVE SPECTROSCOPY OF CH2IBr IN ITS GROUND VIBRATIONAL STATE

2014 ◽  
Author(s):  
Stephane Bailleux ◽  
Denis Duflot ◽  
William Bailey ◽  
Toshiaki Okabayashi ◽  
Hiroyuki Ozeki ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Vibrational State ◽  
Ground Vibrational State

scholarly journals J-Dependence of T2-Parameters for Rotational Transitions of SO2 and CH3OH in K-Band

1985 ◽  
Vol 40 (7) ◽  
pp. 683-685 ◽  
Author(s):  
S. C. Mehrotra ◽  
H. Dreizler ◽  
H. Mäder
Keyword(s):  
Fourier Transform ◽  
Quantum Number ◽  
Ground State ◽  
Significant Variation ◽  
Vibrational State ◽  
Rotational Quantum Number ◽  
Fourier Transform Spectrometer ◽  
Ground Vibrational State ◽  
Rotational Transitions ◽  
Upper Level

With the help of a microwave Fourier transform spectrometer in the range from 18 GHz to 26 GHz, the coefficients ß for the linear pressure depedence of collisional dephasing rates 1/T2 have been determined by the transient emission technique for fourteen pure rotational transitions of SO2 with 5 ≦ J' ≦ 66 in the ground vibrational state, twelve transitions with 8 ≦ J' ≦ 62 in the first excited bending vibrational state, and twelve transitions of methanol with 2 ≦ J' ≦ 11, where J' is the rotational quantum number of the upper level of a transition. The T2-parameter ß for the transition J(K-, K+) - 49(4, 46 ) - 48(5, 43) of SO2 in the ground state shows an anomalous behaviour, whereas the values for all other transitions show a J-dependence in accordance with previous results. No significant variation of T2-parameters with J has been found for the rotational transitions of CH3OH.

scholarly journals Methyl Internal Rotation and 14N Nuclear Quadrupole Coupling from the Rotational Spectra of Ethyl Isocyanide, iso-Propyl Isocyanide and gauche- and trans-n-Propyl Isocyanide

1992 ◽  
Vol 47 (10) ◽  
pp. 1067-1072 ◽  
Author(s):  
Michael Krüger ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Internal Rotation ◽  
Vibrational State ◽  
Fourier Transform Spectroscopy ◽  
Coupling Constants ◽  
Ground Vibrational State ◽  
Rotational Spectra ◽  
Barrier Heights ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

AbstractThe barrier heights (V3) hindering methyl internal rotation were determined with microwave Fourier transform spectroscopy from the ground vibrational state for the title molecules and found to be V3 = 3.336(52) kcal/mol for ethyl isocyanide, V3 > 3.1 kcal/mol for iso-propyl isocyanide, V3 = 2.894(23) kcal/mol for gauche-n-propyl isocyanide and V3 = 2.954(22) kcal/mol for transn- propyl isocyanide. The quadrupole coupling constants of iso-propyl isocyanide are χaa = 179.3(31) kHz, χbb = -140(15) kHz and χcc - 39(15) kHz; the constants of trans-n-propyl isocyanide were determined to be χaa = 268.1 (71) kHz, χbb = - 108(23) kHz and χcc = - 160(23) kHz.

scholarly journals Quadrupole Hyperfine Structure in the Rotational Spectra of 1,2- and 1,3-Dichlorobenzene

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1273-1280 ◽  
Author(s):  
Ch. Keussen ◽  
H. Dreizler ◽  
I. Merke
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Hyperfine Structure ◽  
Vibrational State ◽  
Careful Analysis ◽  
Diagonal Element ◽  
Rotational Spectrum ◽  
Ground Vibrational State ◽  
Rotational Spectra ◽  
Coupling Tensor

AbstractThe high resolution of microwave Fourier transform spectroscopy was used to investigate the 35chlorine hyperfine structure of 1,2- and 1,3-dichlorobenzene, C6H435Cl2 , very accurately in the rotational spectrum of their ground vibrational state. The careful analysis with a new evaluation program also yielded the off-diagonal element of the coupling tensor. The tensor elements are χaa= -41.1153(35) MHz,χbb = 8.3415(96) MHz, χcc = 32.7738(61) MHz, and χab = ±52.41 (58) MHz for 1,2-dichlorobenzene and χaa= -44.174(12) MHz, χbb= 10.876(12) MHz, χcc = 33.298(12) MHz, and χab= ±48.181(39) MHz for 1,3-dichlorobenzene.

The Rotational Spectrum and Nuclear Quadrupole Coupling of CH35C1F2

1996 ◽  
Vol 51 (1-2) ◽  
pp. 129-132 ◽  
Author(s):  
Susana Blanco ◽  
Alberto Lesarri ◽  
Juan C. López ◽  
José L. Alonso ◽  
Antonio Guarnieri
Keyword(s):  
Fourier Transform ◽  
Vibrational State ◽  
Frequency Region ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Frequency Range ◽  
Vibrational States ◽  
Ground Vibrational State ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract The rotational spectrum of CH35CIF2 in the ground vibrational state has been measured in the frequency range 8-18 GHz using a waveguide Fourier transform microwave (FTMW) spectrometer in order to determine accurate nuclear quadrupole coupling constants. The spectra of the excited vibrational states ν5 = 1, ν6 = 1 and ν9 = 1 have been also observed and analyzed in the frequency region 8-250 GHz using FTMW, Stark, and source modulation spectrometers. Quadrupole coupling constants are also reported for these states.

Speed dependence of collisional relaxation in ground vibrational state of OCS: Rotational behaviour

2012 ◽  
Vol 136 (12) ◽  
pp. 124316 ◽  
Author(s):  
Maxim A. Koshelev ◽  
Mikhail Yu. Tretyakov ◽  
François Rohart ◽  
Jean-Pierre Bouanich
Keyword(s):  
Vibrational State ◽  
Rotational Behaviour ◽  
Collisional Relaxation ◽  
Ground Vibrational State ◽  
Speed Dependence

Millimeter Wave Rotational Transitions of 16O12C32S and 16O13C32S

1974 ◽  
Vol 29 (8) ◽  
pp. 1213-1215 ◽  
Author(s):  
N. W. Larsen ◽  
B. P. Winnewisser
Keyword(s):  
Excited States ◽  
Millimeter Wave ◽  
Vibrational Spectra ◽  
Vibrational State ◽  
Vibrational States ◽  
Ground Vibrational State ◽  
Wave Region ◽  
Rotational Transitions ◽  
Good Agreement

Rotational transitions of 16012C32S and 16013C32S in the ground vibrational state and of 16012C32S in several excited states have been accurately measured in the millimeter wave region for a minimum of four different J values. The analysis of the measured frequencies leads to rotational constants for the following vibrational states: 0 00 0 of 16O13C32S and 0 00 0, 0 1 1c 0, 0 1 1d 0, 0 20 0, 0 22c 0, 0 22d 0, 0 00 1 of 16O12C32S. Since the two components of the 0 22 0 transitions were resolved, an analysis of the l-type resonance was carried out and the interval 0 22 0 - 0 20 0 has been determined to be -4.63(10) cm-1. The result is in good agreement with the presently available determination of this level from vibrational spectra.

Optimization of Raman Cooling of 25Mg+ Ion to Ground Vibrational State in Linear Paul Trap

2019 ◽  
Vol 46 (4) ◽  
pp. 138-142
Author(s):  
P. L. Sidorov ◽  
K. Yu. Khabarova ◽  
I. V. Zalivako ◽  
A. S. Borisenko ◽  
I. A. Semerikov
Keyword(s):  
Vibrational State ◽  
Paul Trap ◽  
Linear Paul Trap ◽  
Ground Vibrational State ◽  
Raman Cooling

Elektrisches Dipolmoment von TlBr und TlJ

1971 ◽  
Vol 26 (11) ◽  
pp. 1809-1812 ◽  
Author(s):  
E. Tiemann
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Vibrational State ◽  
Stark Effect ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Ground Vibrational State ◽  
Rotational Transitions

Stark-effect measurements on pure rotational transitions of TlBr and Til are described. The derived electric dipole moments of the most abundant isotopic molecules on the ground vibrational state are:205TL79Br : | μ0| = (4.493 ± 0.050) D , 205Tl127 I | μ 0| =(4.607 ± 0.070) D .The electric dipole moment of 205Tl19F | μ 0|=4.2282 (8) D was used as standard.

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