RATIOS OF RELATIVE ABUNDANCE, MAGNETIC MOMENTS, AND CAPTURE CROSS SECTIONS OF GADOLINIUM ISOTOPES FROM PARAMAGNETIC RESONANCE SPECTRUM
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Precision measurements on the hyperfine structure of the transitions corresponding to DELTA M = 4 of the cubicfield paramagnetic resonance spectrum of gadolinium in single crystals of thorium oxide yield the following values of isotopic abundance: even isotopes, 69.45%; Gd/sup 155/, 15.05 plus or minus 0.2%; Gd/sup 157/, 15.5 plus or minus 0.2%. Ratio of magnetic moments was reported to be mu /sup 155/ mu /sup 157/ = 0.7495 plus or minus 0.0045. Irradiation of crystals 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, yields the ratio of nuclear capture cross sections alpha /sup 157/ sigma /sup 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 neighborhood of the paramagnetic ions. (auth)
- Research Organization:
- Hebrew Univ., Jerusalem; Israel Inst. of Tech., Haifa
- NSA Number:
- NSA-14-000967
- OSTI ID:
- 4218607
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 115; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
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
PARAMAGNETIC-RESONANCE SPECTRUM OF GADOLINIUM IN SINGLE CRYSTALS OF THORIUM OXIDE
A DETERMINATION OF THE NUCLEAR MOMENTS OF Gd$sup 155$ AND Gd$sup 157$ FROM THE HYPERFINE STRUCTURE OF PARAMAGNETIC RESONANCE
Technical Report
·
Fri Oct 31 23:00:00 EST 1958
·
OSTI ID:4258624
PARAMAGNETIC-RESONANCE SPECTRUM OF GADOLINIUM IN SINGLE CRYSTALS OF THORIUM OXIDE
Journal Article
·
Mon Sep 01 00:00:00 EDT 1958
· Phys. and Chem. Solids
·
OSTI ID:4331297
A DETERMINATION OF THE NUCLEAR MOMENTS OF Gd$sup 155$ AND Gd$sup 157$ FROM THE HYPERFINE STRUCTURE OF PARAMAGNETIC RESONANCE
Journal Article
·
Thu Oct 31 23:00:00 EST 1957
· Zhur. Eksp. Teoret. Fiz.
·
OSTI ID:4311083
Related Subjects
CAPTURE-- CROSS SECTIONS-- FAST NEUTRONS-- GADOLINIUM ISOTOPES-- GADOLINIUM 155-- GADOLINIUM 157-- IRRADIATION-- MEASURED VALUES-- NEUTRON FLUX-- REACTORS-- THERMAL NEUTRONS
CRYSTALS-- DEFECTS-- F CENTERS-- FAST NEUTRONS-- GADOLINIUM ISOTOPES-- GADOLINIUM 155-- GADOLINIUM 157-- IRRADIATION-- LATTICES-- MEASURED VALUES-- NEUTRON FLUX-- RADIATION EFFECTS-- THERMAL NEUTRONS-- THORIUM OXIDES-- VACANCIES
CRYSTALS-- GADOLINIUM ISOTOPES- - GADOLINIUM 155-- GADOLINIUM 157-- IMPURITIES-- MEASURED VALUES-- THORIUM OXIDES
GADOLINIUM ISOTOPES-- GADOLINIUM 155-- GADOLINIUM 157-- HYPERFINE STRUCTURE-- MAGNETISM-- MEASURED VALUES-- PARAMAGNETISM-- RESONA
PHYSICS
CRYSTALS-- DEFECTS-- F CENTERS-- FAST NEUTRONS-- GADOLINIUM ISOTOPES-- GADOLINIUM 155-- GADOLINIUM 157-- IRRADIATION-- LATTICES-- MEASURED VALUES-- NEUTRON FLUX-- RADIATION EFFECTS-- THERMAL NEUTRONS-- THORIUM OXIDES-- VACANCIES
CRYSTALS-- GADOLINIUM ISOTOPES- - GADOLINIUM 155-- GADOLINIUM 157-- IMPURITIES-- MEASURED VALUES-- THORIUM OXIDES
GADOLINIUM ISOTOPES-- GADOLINIUM 155-- GADOLINIUM 157-- HYPERFINE STRUCTURE-- MAGNETISM-- MEASURED VALUES-- PARAMAGNETISM-- RESONA
PHYSICS