the attached efficiency curve for the 35 deg. xray detector is made with the runs
e127b_run0015.lmd
e127b_run0016.lmd
e127b_run0017.lmd + e127b_run0019.lmd

All of them were taken in the lab (not in ESR).

This is a very preliminary analysis!
E.g. deadtime has been estimated and was not cleanly determined.