Determination of total η N interaction cross section in η-meson photoproduction from complex nuclei
Dudkin G.N. , Eponeshnikov V.N., Krechetov Yu.F., Tryasuchev V.A.
The incoherent process γ + η + Af from C, Cu, Ag, and Pb was investigated at a maximum bremsstrahlung beam energy EYmax = 900 MeV and at a c.m.s. n-meson emission angle Θ* = 90°. The η mesons were detected by registering the two γ quanta from the η 2γ decay. The total ηΝ-interaction cross section was determined by using the dependence of the η-meson yield from the nuclei on the mass number A and by using the optical model; it was found to be о£й* = (66+20) mb