The ratio of the nuclear gI-factors of 95Mo and 97Mo

With a multi-nuclei Fourier transform NMR spectrometer the ratio of the Larmorfrequencies of 95Mo and 97Mo in a solution of K2MoO4 in H2O has been measured with high accuracy. Using hyperfine interaction constants from literature, we have calculated the hyperfine structure anomaly 95⊿97 = -0.0102(14)% of molybdenum in the atomic ground state 4d55s 7S3.

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Fourier-Kernresonanzuntersuchungen an 10 B und 11 B in wäßriger Lösung / Fourier Transform NMR Studies of 10 B and 11 B in Aqueous Solutions

Zeitschrift für Naturforschung A ◽

10.1515/zna-1975-0805 ◽

1975 ◽

Vol 30 (8) ◽

pp. 955-958 ◽

Cited By ~ 1

Author(s):

B. W. Epperlein ◽

. Lutz ◽

A. Schwenk

Keyword(s):

Fourier Transform ◽

Aqueous Solutions ◽

Hyperfine Interaction ◽

Magnetic Moment ◽

Ground State ◽

Magnetic Shielding ◽

Nmr Studies ◽

Nmr Method ◽

Atomic Ground State ◽

Nmr Signals

Abstract The ratios of the Larmor frequencies of 10 B and 2 H and of 11 B and 10 B have been measured with the NMR method and a magnetic moment has been calculated for 10 B in the B (OH)4- -ion. For this, an investigation of the dependence of the NMR signals of 10 B and 2 H on the concentration of some boron salts in solutions of H2O and D2O was necessary. Using hyperfine interaction constants from literature, the hyperfine structure anomaly 10 ∆ 11 of boron in the 2 P1/2 atomic ground state has been calculated. A difference in the magnetic shielding between the isotopes 10 B and 11 B in different compounds could not be detected.

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Hyperfine structure investigations in the4F9/2 atomic ground state of191Ir and193Ir

Zeitschrift für Physik A Hadrons and Nuclei ◽

10.1007/bf01391592 ◽

1973 ◽

Vol 263 (4) ◽

pp. 341-346 ◽

Cited By ~ 19

Author(s):

S. Büttgenbach ◽

M. Herschel ◽

G. Meisel ◽

E. Schrödl ◽

W. Witte ◽

...

Keyword(s):

Hyperfine Structure ◽

Ground State ◽

Atomic Ground State ◽

Structure Investigations

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Analyse Rotationnelle de la Bande (0,0) du Système Orange de ScO

Canadian Journal of Physics ◽

10.1139/p72-057 ◽

1972 ◽

Vol 50 (4) ◽

pp. 395-403 ◽

Cited By ~ 38

Author(s):

R. Stringat ◽

C. Athénour ◽

J. L. Féménias

Keyword(s):

Excited State ◽

Hyperfine Interaction ◽

Hyperfine Structure ◽

Liquid Nitrogen ◽

Hollow Cathode ◽

Ground State ◽

Type B ◽

Hollow Cathode Lamp ◽

Magnetic Hyperfine Interaction ◽

Coupling Case

The orange system of ScO has been reanalyzed as a 2Π → 2Σ transition. We have observed all the branches which are compatible with the selection rules ΔJ = 0, ± 1. We have not detected the hyperfine structure in the excited state, the coupling case being therefore aβ. The magnetic hyperfine interaction inducing the ground state doubling is the only one which appears; it has been analyzed by other authors who have shown that the coupling case for this state is of the type bβS.The use of an alloy hollow-cathode lamp, cooled with liquid nitrogen, has enabled us to improve the frequency measurements. The values of the constants have been obtained by a method by which, working directly with the Hamiltonian, the introduction of each parameter can be justified. The study of the Λ doubling in 2Π3/2 and 2Π1/2 levels leads us to values of ξ and η very close to those predicted for a pure precession case.

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11B-Quadrupole Hyperfine Structure in the Rotational Spectrum of Phenyldifluoroborane

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-0116 ◽

1989 ◽

Vol 44 (1) ◽

pp. 84-86 ◽

Cited By ~ 8

Author(s):

Kirsten Vormann ◽

Helmut Dreizler

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Ground State ◽

Rotational Spectrum ◽

Frequency Range

Abstract We present an investigation and interpretation of the 11B-quadrupole hyperfine structure (hfs) in the rotational spectrum of phenyldifluoroborane in the torsional ground state of the BF2 group. The measurements were made with a microwave Fourier transform (MWFT) spectrometer in the frequency range between 5 and 8 GHz.

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Investigation of the Microwave Spectrum of Cyclopropyl Isocyanate. An Example for the Failure of Centrifugal Distortion Theory

Zeitschrift für Naturforschung A ◽

10.1515/zna-1990-9-1016 ◽

1990 ◽

Vol 45 (9-10) ◽

pp. 1175-1184 ◽

Cited By ~ 1

Author(s):

C. Heldmann ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Ground State ◽

Microwave Spectrum ◽

Coupling Constants ◽

Rotational Spectrum ◽

Centrifugal Distortion ◽

Vibrational Ground State ◽

Quadrupole Coupling

Abstract The vibrational ground state microwave spectrum of cyclopropyl isocyanate was investigated in the region from 8.4 to 40 GHz by microwave Fourier transform (MWFT) spectroscopy. The quadru-pole hyperfine structure was resolved and assigned. The quadrupole coupling constants are given. With respect to the data given in the literature up to now, this work led to a more profound description of the pure rotational spectrum. Furthermore, some interesting and surprising results concerning the effect of centrifugal distortion are presented. Compared to hitherto existing investi-gations, these results indicate a more complicated conformational behaviour of cyclopropyl iso-cyanate.

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Observation of Quadrupole and Dipole Diamagnetic Shifts in Atomic Ground-State Hyperfine Structure

Physical Review Letters ◽

10.1103/physrevlett.57.567 ◽

1986 ◽

Vol 57 (5) ◽

pp. 567-570 ◽

Cited By ~ 7

Author(s):

S. J. Lipson ◽

G. D. Fletcher ◽

D. J. Larson

Keyword(s):

Hyperfine Structure ◽

Ground State ◽

Atomic Ground State

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Ground state molecular parameters of phosphine, PH3, from the simultaneous analysis of the high-resolution infrared, microwave and submillimeterwave spectra

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19852480 ◽

1985 ◽

Vol 50 (11) ◽

pp. 2480-2492 ◽

Cited By ~ 12

Author(s):

Soňa Přádná ◽

Dušan Papoušek ◽

Jyrki Kauppinen ◽

Sergei P. Belov ◽

Andrei F. Krupnov ◽

...

Keyword(s):

Fourier Transform ◽

High Resolution ◽

Ground State ◽

Unitary Transformation ◽

Point Of View ◽

Acoustic Detection ◽

Molecular Parameters ◽

Microwave Spectrometer ◽

Fourier Transform Spectra ◽

First Time

Fourier transform spectra of the ν2 band of PH3 have been remeasured with 0.0045 cm-1 resolution. Ground state combination differences from these data have been fitted simultaneously with the microwave and submillimeterwave data to determine the ground state spectroscopical parameters of PH3 including the parameters of the Δk = ± 3n interactions. The correlation between the latter parameters has been discussed from the point of view of the existence of two equivalent effective rotational operators which are related by a unitary transformation. The ΔJ = 0, +1, ΔK = 0 (A1 ↔ A2, E ↔ E) rotational transitions in the ν2 and ν4 states have been measured for the first time by using a microwave spectrometer and a radiofrequency spectrometer with acoustic detection.

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