First observation of 229mTh decay

<p>Raw data of the first observation of internal conversion electrons emitted in the decay of 229mTh. Data was taken on 15.10.2014 and consists of 100 CCD camera images (4 s exposure time per image) of an MCP detector combined with a phosphor screen. The detection was performed during soft landing of triply charged 229Th ions on the MCP detector. The 229Th ion beam was generated by thermalization of alpha recoil ions originating from a 233U source. Therefore the isomeric state is populated to about 2%. A Matlab file used for image evaluation is provided in the file folder.</p>