STUDY OF THE INTERNAL FIELDS ACTING ON IRON NUCLEI IN IRON GARNETS, USING THE RECOIL-FREE ABSORPTION IN Fe$sup 57$ OF THE 14.4-kev GAMMA RADIATION FROM Fe$sup 57$m
The shape of the recoil-free absorption spectrum obtained in iron garnet absorbers is investigated, using, as a source, a Co/sup 57/ source embedded in stainless steel. The results confirm the existence of two iron sublattices each showthg a Zeeman structure characterized by different parameters. No significant differences are detected bctween the Zeeman structure in yttrium iron garnet and dysprosium iron garnet. The values obtained for the effective magnetic field at the Fe/sup 57/ nuclei at room temperature are 3.90 x 10/sup 5/ gauss and 4.85 x 10/sup 5/ gauss for the d and a iron lattice sites, respectively. At liquid air temperature the corresponding fields are 4.6 x 10/sup 5/ and 5.4 x lO/sup 5/ gauss, respectively. The mean value of the chemical shift for the d sites relative to stainless steel is about 0.04 plus or minus 0.005 cm/sec and about 0.06 plus or minus 0.005 cm/sec for the a sites. (auth)
- Research Organization:
- Hebrew Univ., Jerusalem
- NSA Number:
- NSA-15-017420
- OSTI ID:
- 4022239
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 122; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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