ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The polarizationP of the beta-rays from Ho166 and P32 has been investigated using the method of combined multiple- and Mott-scattering. The result for $$P/\frac{v}{c}$$ averaged over the energy range accepted by our apparatus $$\left( {\frac{v}{c} \approx 0.8} \right)$$ is $$\left\langle {\left( { - P/\frac{v}{c}} \right)_{Ho^{1^{66} } } } \right\rangle _{Av} = (0.99 \pm 0.02)\left\langle {\left( { - P/\frac{v}{c}} \right)_{P^{3_2 } } } \right\rangle _{Av} .$$ . Furthermore, it is shown that only a small deviation of the polarization from the normal value $$ - P/\frac{v}{c} = 1$$ is to be expected for P32-electrons. Electron polarization and spectrum shape of the O−→O+-transition of Ho166 are discussed with respect to the contribution of pseudoscalar coupling. On the basis of the two component theory of the neutrino (C V =C ′ V ,C A =C ′ A ,C P =C ′ P ) one obtains an upper limit on the contribution of P-coupling: (C P 2 /C A 2 )¦∫ βγ5¦2≲3·10−7. If on does not assume the validity of the two component theory of the neutrino, however, the experiments are compatible with an arbitrary amount of P-coupling. In this case the experimental result indicates, that the two component theory of the electron (C V =C ′ V ,C A =C ′ A ,C P =−C ′ P ) is valid. As a by-product, this work contains a compilation of formulas which are needed for electron polarization calculations using tabulated functions.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01326865
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