MEASUREMENT OF THE Pb M PHOTON INTENSITY IN Po$sup 210$ DECAY--A FURTHER GROSS INADEQUACY OF THE THEORY
The probability that a Pb M photo n is emitted in Po/sup 210/ decay is 0.91( 450 deg C in a 15%) x 10/sup -3/ photons/alpha, as measured by means of a proportional counter and pulse-height analyzer. This value is in gross disagreement with theoretical estimates. A Pb M spectrum from Po/sup 210/ decay shows definite differences from a conventional Pb M spectrum, indicating considerable ejection of higher shell electrons in the Po/sup 210/ decay act. In particular, the spectrum from Po/sup 210/ contains a 3.7-kev component whose intensity is about 4% of the total spectral intensity and whose energy is consistent with the allowed, but hitherto unreported, transition M/sub 1/O/sub 23/ . The theory of electron ejection in alpha decay is reviewed and previous calculations of ejection probabilities are extended to include ejection to bound states. The estimates of K, L, and M photon yields on this theory are orders of magnitude lower than the measured yields. Possible sources of the discrepancy are discussed. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-17-022637
- OSTI ID:
- 4726463
- 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- Physical Review (U.S.) Superseded in part by Phys.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, Vol. Vol: 130; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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