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The code takes into account 9 two-body channels both on proton and neutron, including
channels with production of
barionic (delta) resonances and scalar (eta) or vector mesons (rho and omega). Due to
their small life time, delta
and rho decay into N-pi and pi-pi channels, respectively. For each channels, both total
and differential cross section
are calculated from a phenomenological analisys of experimental data.
Channel numbering for two body final states
1 gamma p ---> pi+ n
2 gamma p ---> pi0 p
3 gamma n ---> pi- p
4 gamma n ---> pi0 n
5 gamma p ---> delta++ pi-
6 gamma p ---> delta+ pi0
7 gamma p ---> delta0 pi+
8 gamma n ---> delta+ pi-
9 gamma n ---> delta0 pi0
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10 gamma n ---> delta- pi+
11 gamma p ---> rho0 p
12 gamma p ---> rho+ n
13 gamma n ---> rho- p
14 gamma n ---> rho0 n
19 gamma p ---> eta p
20 gamma n ---> eta n
21 gamma p ---> omega p
22 gamma n ---> omega n
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