E. Geisenhofer et W. Nakel, ASYMMETRY OF BREMSSTRAHLUNG FROM TRANSVERSELY POLARIZED ELECTRONS .2.EXPERIMENT, Zeitschrift fur Physik. D, Atoms, molecules and clusters, 37(2), 1996, pp. 123-126
By using an electron-photon coincidence method the photon emission asy
mmetry in the elementary process of bremsstrahlung from transversely p
olarized electrons was measured. For an electron beam of 300 keV incid
ent on a gold target the asymmetry for spin up and down of the primary
beam was measured for fixed directions of the outgoing electrons and
photons as a function of the energy split. Asymmetries up to 30% were
found. The measurements are a proper test for theories going beyond th
e first Born approximation.