DETERMINATION OF RELATIVE ABUNDANCE, RATIO OF MAGNETIC MOMENTS, RATIO OF CAPTURE CROSS-SECTIONS OF GADOLINIUM ISOTOPES BY MEANS OF PARAMAGNETIC RESONANCE SPECTRUM. Technical Note No. 5

Technical Report · Sat Nov 01 04:00:00 EST 1958

OSTI ID:4258624

Low, W; Shaltiel, D

Measurements of the hyperfine structure of the transitions corresponding to DELTA M = 4 of the cubic field paramagnetic resonance spectrum of gadolinium in single crystals of thorium oxide yields the following values: Isotopic abundance of even isotopes, 69.45%; Gdmagnetic moments, mu 155/ mu 157 = 0.7495 the J-57 engin 0.0045. Crystals irradiated at the Harwell pile with a thermal neutron flux of 1.2 x 10/sup 12/ n/cm/sup 2//sec, and a fast flux of 2.3 x 10/sup 11/ n/cm/sup 2//sec, yield the ratio of nuclear capture cross sections sigma 157/ sigma 155 = 2.82, using the above abundance values. No F center spectrum was detected in crystals irradiated with a total neutron flux of about 10/sup 18/ n/ cm/sup 2/. The paramagnetic resonance spectrum of gadolinium in irradiated crystals is unchanged indicating negligible radiation damage in the neighborbood of the paramagnetic ions. (auth)

• Research Organization: Hebrew Univ., Jerusalem; Israel Inst. of Tech., Haifa
• NSA Number: NSA-13-010389
• OSTI ID: 4258624
• Report Number(s): AFOSR-TN-59-84; AD-210144
• Country of Publication: United States
• Language: English

Related Subjects

CAPTURE
CROSS SECTIONS
CRYSTALS
F CENTERS
GADOLINIUM 155
GADOLINIUM 157
GADOLINIUM ISOTOPES
HYPERFINE STRUCTURE
IONS
IRRADIATION
LATTICES
MAGNETIC FIELDS
MAGNETIC MOMENTS
MEASURED VALUES
NEUTRON FLUX
NUCLEAR MAGNETIC RESONANCE
PHYSICS AND MATHEMATICS
QUANTITY RATIO
RADIATION EFFECTS
SPECTRA
THERMAL NEUTRONS
THORIUM OXIDES
VACANCIES