PARAMAGNETIC RESONANCE IN THE 10,000 Mc BAND OF EUROPIUM AND GADOLINIUM SUBJECTED TO A CUBIC CRYSTALLINE FIELD

Journal Article · Tue Jan 01 04:00:00 EST 1957 · Helvetica Physica Acta (Switzerland)

OSTI ID:4322019

Ryter, C

Bivalent Eu and trivalent Gd appear as impurities in natural fluorite, CaF/sub 2/. They were subjected to an electric field of cubic symmetry, and both were in a /sup 8/S/sub 7/2/, ground state. The paramagnetic resonance spectra observed at 10,000 Mc permitted the deduction of total base separation DELTA E, the ratio R between the three Stark sub-levels which are slightly different from 3/5, and the Lande factor, g. We found the following values; for Gd/sup 3+/: E = 0.1491 plus or minus 0.0008 cm/sup -1/, R lambda 0.596 plus or minus 0.002, g l.9918 plus or minus 0.0010; for Eu/sup 2+/ DELTA E = 0.l784 plus or minus 0.0009 cm/sup -1/, R = 0.612 plus or minus 0.003, g = 1.9927 plus or minus 0.0010. For Eu the hyperfine structure of the 2 isotopes is resolved for the 001 direction of the magnetic field. The ratio of nuclear moments and the coupling constants found are: K/sub 151/ = 32.62 plus or minus 0.10 gauss; K/sub 153/ = 16.23 plus or minus 0.10 gauss; mu 151/ mu 153 = 2.26 plus or minus 0.02. The hertzian spectrograph used for these experiments permits study of the paramagnetic absortion by eliminating scattering. It is briefly described, and the scheme of the new elements is given. (T.R.H.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-12-003595
• OSTI ID: 4322019
• Journal Information: Helvetica Physica Acta (Switzerland), Journal Name: Helvetica Physica Acta (Switzerland) Vol. Vol: 30; ISSN HPACA
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ABSORPTION
CALCIUM FLUORIDES
CHEMISTRY
CRYSTALS
ELECTRIC FIELDS
EUROPIUM
FREQUENCY
GADOLINIUM
HYPERFINE STRUCTURE
IMPURITIES
LATTICES
MAGNETIC FIELDS
MAGNETIC RESONANCE
SCATTERING
SPECTRA