Asymmetry of bremsstrahlung from polarized electrons
Tóm tắt
The triply differential cross section of unpolarized bremsstrahlung produced by polarized electrons in the Coulomb field of a nucleus is calculated with the aid of Sommerfeld-Maue wave functions. The photon asymmetry originating from transversely polarized electrons is calculated for various values of energies and angles, in particular for the parameters of recent experiments. As a function of the atomic number Z of the target nucleus, the asymmetry shows a distinct deviation from a linear dependence, in contrast to a previous calculation exact to lowest order in the Coulomb parameter Z/137. The cross-section formula is integrated numerically over the angles of the outgoing electrons to obtain the photon asymmetry observed in non-coincidence experiments.
Tài liệu tham khảo
Bethe, H., Heitler, W.: Proc. Roy. Soc. A 146, 83 (1934)
Johnson, W.R., Rozics, J.D.: Phys. Rev. 128, 192 (1962)
Darwin, C.G.: Proc. Roy. Soc. A 118, 654 (1928)
Sommerfeld, A., Maue, A.W.: Ann. Phys. 22, 629 (1935)
Bethe, H.A., Maximon, L.C.: Phys. Rev. 93, 768 (1954)
Elwert, G., Haug, E.: Phys. Rev. 183, 90 (1969)
Mergl, H., Prinz, H.-Th., Schröter, C.D., Nakel, W.: Phys. Rev. Lett. 69, 901 (1992)
Geisenhofer, E., Nakel, W.: Z. Phys. D (1996)
Rozics, J.D., Johnson, W.R.: Phys. Rev. 135B, 56 (1964)
Asai, J., Ogata, H.: Z. Phys. A 311, 281 (1983)
Tseng, H.K., Pratt, R.H.: Phys. Rev. A 7, 1502 (1973)
Tong, X.-M., Shaffer, C.D., Pratt, R.H.: Phys. Rev. A to be published
Olsen, H., Maximon, L.C.: Phys. Rev. 114, 887 (1959)
Pratt, R.H., Feng, I.J.: In: Atomic inner-shell physics. Crasemann, B. (ed.) New York: Plenum 1985, p. 533