Microwave Measurements of Rotational Transitions and Nitrogen Quadrupole Coupling for 2-aminopyridine

Abstract Employing the high resolution of microwave Fourier transform spectroscopy, we investigated the lowest rotational transitions of fluoro-, bromo-, and iodoacetylene-d. Along with the rotational, centrifugal distortion, halogen nuclear quadrupole, and halogen spin-rotation coupling constants, we determined the deuterium quadrupole coupling constants of bromo-and iodoacetylene-d. For fluoroacetylene-d, we redetermined the deuterium nuclear quadrupole coupling constants with higher accuracy.

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Microwave Rotational Spectrum of Indium Monofluoride

Zeitschrift für Naturforschung A ◽

10.1515/zna-1969-0423 ◽

1969 ◽

Vol 24 (4) ◽

pp. 634-636 ◽

Cited By ~ 9

Author(s):

F. J. Lovas ◽

T. Törring

Keyword(s):

Spin Rotation ◽

Coupling Constants ◽

Rotational Spectrum ◽

Coupling Constant ◽

Vibrational States ◽

Molecular Parameters ◽

Microwave Rotational Spectrum ◽

Quadrupole Coupling ◽

Rotational Transitions

Abstract The rotational transitions J = 1 → 2 and 2 → 3 were measured in 115In19F. From these spectra the following molecular parameters have been determined: the Dunham-coefficients Y01, Y11 and Y02, the quadrupole coupling constants, eqQ, in the ν = 0 and v = 1 vibrational states as well as the spin-rotation coupling constant cIn.

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Hyperfine structures of the resonance lines of indium 115

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1957.0128 ◽

1957 ◽

Vol 241 (1226) ◽

pp. 283-298 ◽

Cited By ~ 9

Keyword(s):

Electric Quadrupole ◽

Systematic Errors ◽

Coupling Factor ◽

Probable Error ◽

Microwave Measurements ◽

Doppler Width ◽

Quadrupole Moments ◽

Quadrupole Coupling ◽

Fabry Perot ◽

Hyperfine Structures

The hyperfine structures of the two visible resonance lines of the arc spectrum of indium 115 have been measured in the absorption of a multiple atomic beam of high collimation by means of a double Fabry-Perot interferometer; the combined instrumental and Doppler width of the absorption lines was less than 5 mK (0∙005 cm -1 ). By taking the necessary precautions to avoid systematic errors and by measuring a large number of different interferograms to reduce the random error it has been possible to measure the h. f. s. of the lines 4101 and 4511 Å with an accuracy sufficient to allow the intervals of the terms 5 2 P 3/2 , 5 2 P ½ and 6 S ½ to be determined with a probable error of 0∙07 mK. The ratios of the three h. f. s. intervals of the term 5 2 P 3/2 are in agreement, within the limits of the probable error, with those required on the assumption that the h. f. s. is due to nuclear magnetic dipole and electric quadrupole moments; the value found for the dipole coupling factor, A , is 8∙083 ± 0∙01 mK and for the quadrupole coupling factor, B , is 15∙10 ± 0∙1 mK. A comparison is made between the values of the h. f. s. intervals found in this work and those found by microwave measurements, since one of the principal aims of this research is to test the agreement between the results found by optical spectroscopic methods and by microwave methods.

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Notizen:Hyperfeinstruktur von CsCl

Zeitschrift für Naturforschung A ◽

10.1515/zna-1972-1022 ◽

1972 ◽

Vol 27 (10) ◽

pp. 1516-1517

Author(s):

J. Hoeft ◽

E. Tiemann ◽

T. Törring

Keyword(s):

Hyperfine Structure ◽

Line Width ◽

Quadrupole Coupling Constant ◽

Rotational Transition ◽

Coupling Constants ◽

Coupling Constant ◽

Vibrational States ◽

Upper Limit ◽

Quadrupole Coupling ◽

Rotational Transitions

Abstract The quadrupole hyperfine structure of 133Cs35Cl was measured on the rotational transition J=1 → 2 at 8.6 GHz. The calculated quadrupole coupling constants of 35Cl in various vibrational states are reported. The observed line width of the rotational transitions yields an upper limit of the quadrupole coupling constant of 133Cs.

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Die Mikrowellen-Rotationsspektren des AgCl, AgBr und AgJ

Zeitschrift für Naturforschung A ◽

10.1515/zna-1971-0210 ◽

1971 ◽

Vol 26 (2) ◽

pp. 240-244 ◽

Cited By ~ 28

Author(s):

J. Hoeft ◽

F. J. Lovas ◽

E. Tiemann ◽

T. Törring

Keyword(s):

Coupling Constants ◽

Rotational Spectrum ◽

Vibrational States ◽

Molecular Constants ◽

Quadrupole Coupling ◽

Rotational Transitions

The observation of the low lying rotational transitions J = 0 →1 of AgCl and J = 2→3 of AgBr resulted in improved quadrupole coupling constants: 107, 109Ag35Cl: e qν Q (35Cl) = -36,50 (10) MHz (ν=0,1); 107.109Ag79Br; e q0 Q(79Br) =297,10(15) MHz, e q1 Q (79Br) =297,65 (15) MHz. In contrast to former measurements of KRISHER and NORRIS we obtained the following constants of 107Ag79Br: Y01 = 1943,6420 (50) MHz, Y11 = -7,0745(70) MHz, re = 2,393100(29) Å. The unknown rotational spectrum of AgJ was found. Measurements of the transition J = 3 →4 in four vibrational states resulted in the determination of the following molecular constants: Y01 = 1345,1105(25) MHz, Y11= -4,2389(30) MHz, Y21 = 1,70(80) kHz, Y0,=-0,2540(2) kHz; re = 2,544611 (31) Å; e q0 Q(127J) =-1062,17(40) MHz, e q1 Q(127J) = -1064,81 (40) MHz.

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Microwave measurements of manganese quadrupole coupling in cyclopentadienyl manganese tricarbonyl

The Journal of Chemical Physics ◽

10.1063/1.462048 ◽

1992 ◽

Vol 96 (4) ◽

pp. 2449-2452 ◽

Cited By ~ 10

Author(s):

M. A. Roehrig ◽

D. W. Wallace ◽

S. G. Kukolich

Keyword(s):

Microwave Measurements ◽

Quadrupole Coupling ◽

Manganese Tricarbonyl

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Quadrupole Hyperfine Structure and Splitting of Δ-Levels in the Microwave Spectra of KOH,RbOH and CsOH in the 100 GHz Region

Zeitschrift für Naturforschung A ◽

10.1515/zna-1977-0904 ◽

1977 ◽

Vol 32 (9) ◽

pp. 930-934 ◽

Cited By ~ 1

Author(s):

P. Kuijpers ◽

T. Törring ◽

A. Dymanus

Keyword(s):

Vibrational Spectrum ◽

Hyperfine Structure ◽

Quadrupole Coupling Constant ◽

Coupling Constant ◽

Microwave Spectra ◽

Quadrupole Coupling ◽

Rotational Transitions ◽

Alkali Hydroxides

Abstract Hyperfine structure of rotational transitions of KOH, RbOH and CsOH in various υ2-and l-states has been carefully measured in the 100 GHz range. From the observed splittings and broadenings information about quadrupole coupling constant (eqQ) of the K nucleus in KOH and about the spacing (EΔ - EΣ) between Σ and Δ levels in the vibrational spectrum of KOH, RbOH and CsOH has been derived. The measured value of the eqQ of KOH is close to that of KF. The separation between Σ and Δ levels is found to be rather similar for the group of the alkali hydroxides in creasing gradually when progressing from LiOH to CsOH.

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