Measurement of delbrueck scattering and observation of photon splitting at high energies
1973
11 pages
Published in:
- Phys.Rev.D 8 (1973) 3813-3823
Report number:
- DESY-73-04
View in:
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Abstract: (APS)
The differential cross section for Delbrück scattering has been measured at photon energies between 1 and 7 GeV and scattering angles between 1 and 3 mrad on copper, silver, gold, and uranium targets. The results confirm the predictions of quantum electrodynamics, if the exchange of a very large number of photons with the nucleus (Coulomb correction) is taken into account. At momentum transfers of a few MeV/c, the Coulomb correction for uranium results in a reduction of the cross section by a factor between 3 and 5 as compared to the prediction of lowest-order relativistic perturbation theory. The photon-splitting process has been experimentally detected at the same energies and angles. Estimates of the cross section are given.- scattering: delbrueck
- delbrueck: scattering
- photon nucleus: elastic scattering
- elastic scattering: photon nucleus
- copper
- silver
- gold
- uranium
- quantum electrodynamics: validity test
- correction: coulomb scattering
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