Radiative capture of s electrons in the decay of $sup 7$Be
The high-energy part of the spectrum of internal bremsstrahlung (IB) photons accompanying the allowed electron-capture (EC) transition from /sup 7/Be to thc ground state of /sup 7/Li has been measured with a Ge(Li) gamma -r ay ileup rejector. The probablity for emission of internal bremsstrahlung photons with energies higher than 523.7 keV per ground-state EC decay of /sup 7/Be was determined to be (9.0 plus or minus 0.6) x 10/sup -5/. Comparable theoretical results for radiative capture of 1 s + 2s orbital electrons are 8.61 x 10/sup -5/ , deduced from the theory of Martin and Glauber, and 8.60 x 10/sup -5/, deduced from the recent improved calcilations of Intemann. The confirmation of the predicted rate of radiative to ordinary 1s + 2s capture in /sup 7/Be is in good agreement with our recent similar experiment on /sup 51/Cr, but is partly at variance with previous IB gamma -coincidence experiments on /sup 7/ Be. The transition energy of /sup 7/Be was determined to be 851 plus or minus 12 keV, in agreement with accepted atomic mass differences. (auth)
- Research Organization:
- Central Bureau for Nuclear Measurements, EURATOM, 2440 Geel, Belgium
- NSA Number:
- NSA-29-022865
- OSTI ID:
- 4315054
- Journal Information:
- Phys. Rev., C, v. 8, no. 6, pp. 2089-2093, Journal Name: Phys. Rev., C, v. 8, no. 6, pp. 2089-2093; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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