MOSSBAUER EFFECT IN IRON(III) ACETYLACETONATE AND CHEMICAL CONSEQUENCES OF K CAPTURE IN COBALT(III) ACETYLACETONATE
The resonance absorption of 14.4-kev gamma rays in Fe/sup 57/ (Mossbauer effect) was observed in Fe(III) and Co(III) acetylacetonate, the former used as an absorber against a source of C0/sup 57/ diffused into metallic chromium, the latter as a Co/sup 57/ labeled source against an K/sub 4/Fe(CN)/sub 6/ (38%Fe/sup 57/ absorber. The Fe(lll) acetylacetonate absorber spectrum shows a single broad line ( GAMMA /sub 1/2, = 1.83 plus or minus 0.09 mm-sec/sup -1/) with an isomer shift of 0.50 plus or minus 0.09 mm-sec/sup -1/. The Co(III) acetylacetonate source shows a complex spectrum which can be resolved into a single peak assigned to Fe(III) and a quadrupole slablit pair of lines assigned to Fe(II). These data are interpreted in terms of the chemical consequences following K capture in Co/sup 57/ and suggest a twofold preference for the stabilization of the higher charge state in the Co(III) acetylacetonate matrix. No evidence for ionic charge states higher than 3+ is observed, and it is assumed that these species--if formed as a consequence of the prior nuclear event--have been reduced to the observed states in times short compared to 10/sup -7/ sec. (auth)
- Research Organization:
- Bell Telephone Labs., Inc., Murray Hill, N.J.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-032191
- OSTI ID:
- 4773697
- Journal Information:
- Journal of Chemical Physics (U.S.), Vol. Vol: 37; Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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