THE DETERMINATION OF THE ISOTOPIC ABUNDANCE OF URANIUM BY MEANS OF HIGH- RESOLUTION SPECTROSCOPY. I. THE CONSTRUCTION AND OPERATION OF A SPECTROGRAPH EMPLOYING AN ECHELLE GRATING AND PHOTOGRAPHIC RECORDING
A simple, compact, high resolution spectrograph has been constructed which employs an echelle grating in a Littrow mounting. The dispersion and resolving power of the instrument are sufficient to separate the isotopic lines of U/sup 235/ and U/sup 238/ at 4244A, and these lines have been used to determine the abundance of U/aup 238/in a standard sample using a photographic recording technique. The conventional technique for determining the intensities of the recorded lines gave erroneous results which were shown to arise as a result of the presence of mgnetic hyperfine structure in the U/sup 235/ line and its absence in the U/sup 238/ line. A modified technique was introduced, and a result of 45.63 plus or minus 0.1% U/sup 235/ was obtained which was in close agreement with the accepted value of 45-67% U for the standard samples. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Industrial Group. Capenhurst Works, Capenhurst, Ches., England
- NSA Number:
- NSA-14-001495
- OSTI ID:
- 4189848
- Report Number(s):
- IGO-R-/CA/56; IGC/ARDC-P/289
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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