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Small Angle Photon Scattering on Complex Nuclei

Criegee, L. ; Franke, G. ; Giese, A. ; et al.

Nucl.Phys.B 121 (1977) 38-44, 1977.

Inspire Record 118811 DOI 10.17182/hepdata.35513

Photons of 3 GeV and 5 GeV were scattered on 7 different elements, ranging from Be to Au, and detected with a pair spectrometer. The angular distributions show diffractive patterns consistent with known nuclear sizes. Forward cross sections are 20–30% lower than expected from an A 2 dependence. This shadowing effect is qualitatively explained by photon interactions via intermediate hadronic states.

25 data tables

Table 1

SYS ERR = 3.01 PCT, NORM ERR = 1.63 PCT.

Table 2

SYS ERR = 2.94 PCT, NORM ERR = 1.60 PCT.

Table 3

SYS ERR = 5.58 PCT, NORM ERR = 1.61 PCT.