MEASUREMENTS ON THE LONGITUDINAL POLARIZATION OF BETA RAYS FROM P$sup 32$, Y$sup 90$, Pr$sup 144$, Au$sup 198$, AND Bi$sup 210$ (RaE)

Journal Article · Mon Dec 01 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.112.1684· OSTI ID:4248843

Geiger, J S; Ewan, G T; Graham, R L; MacKenzie, D R

The polarization of the beta rays from five negatron emitters were studied by the method of Moller scattering in a magnetized NiFe foil. The scattered incident electron and the recoil electron from the target foil are detected in coincidence by two scintillation counters. The difference between the coincidence counting rates for the two directions of foil magnetization divided by the average rate gives a quantitative measure of the longitudinal polarization of the incident beta rays. Our experimental results are as follows: P/sup 32/, P = - (0.94 plus or minus 0.06)v/c; Y/sup 90/ P = - (0.86 plus or minus 0.06)v/c; Pr/sup 144/P = - (0.90 plus or minus 0.22)v/c; Au/sup 198/ P =- (0.98 plus or minus 0.18) x v/c; and for RaE, P=- (0.69 plus or minus 0.10)v/ c. The first four results may indicate a polarization magnitude slightly less than full -v/c. The differences are, however, within the range of possible systematic errors. The result obtained with RaE is significantly lower than the average of the other four results. This indicates a departure from --v/c polarization for this nuclide. (auth)

• Research Organization: Atomic Energy of Canada Ltd., Chalk River, Ont., Can.
• NSA Number: NSA-13-008159
• OSTI ID: 4248843
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 112; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA PARTICLES
BISMUTH 210
COINCIDENCE METHODS
ELECTRONS
ERRORS
FOILS
GOLD 198
MAGNETIC FIELDS
MEASURED VALUES
NICKEL ALLOYS
PHOSPHORUS 31
PHYSICS AND MATHEMATICS
POLARIZATION
PRASEODYMIUM 144
RECOILS
SCATTERING
SCINTILLATION COUNTERS
VELOCITY
YTTRIUM 90