Measurement of the circular polarization of internal and external bremsstrahlung

Journal Article · Tue Jan 31 23:00:00 EST 1961 · European Physical Journal. A

DOI:https://doi.org/10.1007/BF01341800· OSTI ID:4099543

Galster, S.

The polarization of the internal bremsstrahlung gamma 's was detected by Compton-forward-scattering with polarized electrons for three beta -decays: (1.) for the allowed transition (P³²), (2.) for the unique forbidden transition (Sr⁹⁰ + Y⁹⁰), and (3.) for the forbidden transition with forbidden spectrum (Bi²¹⁰ = RaE). The detected polarization values of P³² and (Sr⁹⁰ + Y⁹⁰) agree with theoretical values for the allowed transitions. The detected polarization values for Bi²¹⁰ are smaller than the theoretical values of the allowed beta -transition by a factor of 0.62 plus or minus 0.08. The polarization of the external bremsstrahlung was measured as a function of the atomic number (Z) using thick absorbers, and it decreases slowly with the increase of the atomic number. The polarization, extrapolated to an absorber with atomlc number Z = 0, is in good agreement with theoretical values of the infinitively thin absorbers.

• Research Organization: Universitat, Mainz
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-007978
• OSTI ID: 4099543
• Journal Information: European Physical Journal. A, Journal Name: European Physical Journal. A Journal Issue: 1 Vol. 161; ISSN 1434-6001
• Publisher: Springer
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
BETA DECAY
BISMUTH 210
BREMSSTRAHLUNG
COMPTON EFFECT
DETECTION
ELECTRONS
MEASURED VALUES
PHOSPHORUS 32
PHOTONS
POLARIZATION
SCATTERING
STRONTIUM 90
TRANSIENTS
YTTRIUM 90