Optical isotopic shifts and hyperfine splittings for Yb

1979 ◽  
Vol 20 (1) ◽  
pp. 239-253 ◽  
Author(s):  
D. L. Clark ◽  
M. E. Cage ◽  
D. A. Lewis ◽  
G. W. Greenlees
Keyword(s):  
Isotopic Shifts ◽  
Hyperfine Splittings

Nuclear Processes Related to the Ap Stars and the Heaviest Chemical Elements

1976 ◽  
Vol 32 ◽  
pp. 169-182
Author(s):  
B. Kuchowicz
Keyword(s):  
Nuclear Physics ◽  
Nuclear Reactions ◽  
Chemical Elements ◽  
Fission Products ◽  
Abundance Pattern ◽  
Isotopic Shifts ◽  
Processed Material ◽  
R Process ◽  
Ap Stars ◽  
Nuclear Processes

SummaryIsotopic shifts in the lines of the heavy elements in Ap stars, and the characteristic abundance pattern of these elements point to the fact that we are observing mainly the products of rapid neutron capture. The peculiar A stars may be treated as the show windows for the products of a recent r-process in their neighbourhood. This process can be located either in Supernovae exploding in a binary system in which the present Ap stars were secondaries, or in Supernovae exploding in young clusters. Secondary processes, e.g. spontaneous fission or nuclear reactions with highly abundant fission products, may occur further with the r-processed material in the surface of the Ap stars. The role of these stars to the theory of nucleosynthesis and to nuclear physics is emphasized.

Force field for in-plane vibrations of terephthalonitrile

1989 ◽  
Vol 54 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Juan F. Arenas ◽  
Juan I. Marcos ◽  
Francisco J. Ramírez
Keyword(s):  
Experimental Data ◽  
Force Field ◽  
Normal Coordinates ◽  
Internal Coordinates ◽  
Isotopic Shifts ◽  
Quadratic Force Field ◽  
Semi Empirical

The general quadratic force field for the in-plane vibrations of terephthalonitrile was calculated by the semi-empirical MINDO/3 method. This force field was refined to the frequencies observed experimentally for terephthalonitrile and isotopic shifts of terephthalonitrile-[15N2]. The refined frequencies reproduce the experimental data with errors less than 0.5%. The normal coordinates and the force field in internal coordinates were also calculated from the refined field.

ChemInform Abstract: Determination of Hyperfine Splittings of Biradical Termini by Combining Biradical Trapping and Time-Resolved ESR Techniques

ChemInform ◽  
2010 ◽  
Vol 24 (46) ◽  
pp. no-no
Author(s):  
I. V. KOPTYUG ◽  
N. D. GHATLIA ◽  
N. J. TURRO ◽  
W. S. JENKS
Keyword(s):  
Time Resolved ◽  
Hyperfine Splittings

High resolution spectrum of GdO

1976 ◽  
Vol 54 (24) ◽  
pp. 2429-2434 ◽  
Author(s):  
B. R. Yadav ◽  
S. B. Rai ◽  
D. K. Rai
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Visible Emission ◽  
High Resolution Spectrum ◽  
First Order ◽  
Isotopic Shifts ◽  
Vibrational Constants ◽  
Dc Arc

The visible emission spectrum of the GdO molecule has been produced in a DC arc source and has been photographed in the first order of a 10.6 m grating spectrograph. Bands are shown to have a six-headed structure and improved vibrational constants have been obtained in this study. Isotopic shifts have been calculated for the various isotopic molecules. Tentative suggestions regarding the nature of the transition have been made.

Chlorine Hyperfine Splittings in Phenoxy Free Radicals

Nature ◽  
1964 ◽  
Vol 204 (4962) ◽  
pp. 991-992 ◽  
Author(s):  
B. T. ALLEN ◽  
W. VANNESTE
Keyword(s):  
Free Radicals ◽  
Hyperfine Splittings

Ionic dissociation of hydroxycyclohexadienyl radical: effect on carbon-13 hyperfine splittings

1985 ◽  
Vol 89 (14) ◽  
pp. 3101-3102 ◽  
Author(s):  
Michael Lefcourt ◽  
Keith P. Madden ◽  
Robert H. Schuler
Keyword(s):  
Ionic Dissociation ◽  
Hyperfine Splittings

Semiempirical model of isotopic shifts of the band gap

1991 ◽  
Vol 43 (11) ◽  
pp. 9259-9261 ◽  
Author(s):  
Alexander A. Berezin ◽  
Ahmad M. Ibrahim
Keyword(s):  
Band Gap ◽  
Semiempirical Model ◽  
Isotopic Shifts

Frequency measurements of hyperfine splittings in ground rovibronic states of I by stimulated resonant Raman spectroscopy

1999 ◽  
Vol 6 (1) ◽  
pp. 63-76
Author(s):  
J.-P. Wallerand ◽  
F. du Burck ◽  
B. Mercier ◽  
A.N. Goncharov ◽  
M. Himbert ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Frequency Measurements ◽  
Resonant Raman ◽  
Hyperfine Splittings

Metal Isotope Effect on Metal-Ligand Vibrations. IX. Far Infrared Spectra of Octahedral Nickel Halide Complexes of Pyridine and γ-Picoline

1973 ◽  
Vol 27 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Y. Saito ◽  
C. W. Schläpfer ◽  
M. Cordes ◽  
K. Nakamoto
Keyword(s):  
Isotope Effect ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Isotopic Shifts ◽  
Halide Complexes ◽  
Far Infrared Spectra ◽  
Metal Ligand

The far infrared spectra of Ni (pyridine)4X2 and Ni(γ-picoline)4X2 (X = CI, Br and I) have been measured. The Ni-X and Ni-N stretching bands have been assigned based on isotopic shifts due to the 58Ni-62Ni, pyridine-pyridine-d5, and Cl-37Cl substitutions.

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