Naslov
Polarization Effects in Compton Scattering from K-electrons

Autori
Kaliman, Zoran ; Orlić, Nada ; Jelovica, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
ISRP-9 (9th International Symposium on Radiation physics), Abstracts / - , 2003, A-84

Skup
ISRP-9 (9th International Symposium on Radiation physics),

Mjesto i datum
Cape Town, Južnoafrička Republika, 24.10.2003. - 31.10.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
triply differential cross section; Compton scattering; particle approximation;

Sažetak
The triply differential cross section (TDCS) for Compton scattering from K-electrons is obtained in a full relativistic second-order S-matrix numerical calculations within the independent particle approximation (SM). The approach is applicable in all three regions of the Compton spectrum: the infrared divergent region, the resonant region and the Compton peak region. Our calculation corresponds to the situation in which polarized incident photons are scattered off an unoriented K-electron, and polarization of scattered photon and outgoing electron are not observed. The formalism and numerical code is based on previous work 1 where the TDCS for unpolarized incident photon is calculated. The double differential cross section (DDCS), developing a suitable code, is calculated before 2 in the same model. The results for the TDCS in a full relativistic SM calculation were compared with the results from less accurate nonrelativistic approximate methods. We have tested our SM calculation of the TDCS against the dipole approximation 3, 4 in infrared divergent region for low Z atom and low incident photon momentum. In the Compton peak region and for nonrelativistic energies the SM calculation were tested with the form factor approximation 5 . The excellent agreement are obtained for polarized as well as for unpolarized incident photons. We have compared our relativistic SM result for the TDCS in the scattering of 279.11 keV photons from a K-shell electron of lead with the nonrelativistic cross section obtained by summing the TDCS obtained in and approximation, neglecting the interference effects beetwen these terms. The comparison shows the similar discrepancy for polarized as for the unpolarized incident photon.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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