Study of High-Resolution Spectroscopy of Plutonium. Part I. Contribution to the Classification of the Arc Spectrum. Part II. Determination of the Magnetic Moment of Pu$sup 23$$sup 9$; ETUDE DU PLUTONIUM PAR SPECTROSCOPIE A HAUTE RESOLUTION: CONTRIBUTION A LA CLASSIFICATION DU SPECTRE D'ARC ET DETERMINATION DU MOMENT MAGNETIQUE DE $sup 239$Pu
Thesis/Dissertation
·
OSTI ID:4727470
Thesis submitted to University, Paris. The study of the hyperfine structure and isotope shift enabled the positions of the first five levels of the multiplet /sup 7/ F/sub 0-6/ belonging to the fundamental configuration /sup 5/f/ sup 6/7s/ sup 2/ to be determined. The classification of the arc spectrum begun in this way led to 25 odd levels, the number of classified lines (70) representing about 30 p. 100 of the light emitted by this hollow cathode in the visible. In addition, the isotope shifts of many lines and the data given by the King furnace show that the first levels of the configuration damental level /sup 7/Fo. The proximity of the configuration f/sup 6/s/sup 2/ and f/sup 5/ds/sup 2/ shows that the bonding energies of the 5f and 6d electrons are of the same order of magnitude and this fact must be responsible for the multiple valencies belonging to plutonium. From the hyperfine structure of spark lines (Pu II) the interval factor a/sub 7/ for the electron was deduced giving for the calculated nuclear moment of /sup 239/Pu a value of +0.21 plus or minus 0.06 mu N. The position of the hyperfine components show that the nuclear moment is positive, although the theoretical value given by B. R. Mottelson and S. Nillson is negative and equal to -0.1 mu /sub N/. (auth)
- Research Organization:
- France. Commissariat a l'Energie Atomique. Centre d'Etudes Nucleaires, Saclay
- NSA Number:
- NSA-17-015946
- OSTI ID:
- 4727470
- Report Number(s):
- CEA-2238
- Country of Publication:
- France
- Language:
- English
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