Jule 3,2007 Cf-252 without lead container measurements with HpGe & fast plastic scintillators in coincidence
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Paraffin wax layer of thickness 12.6 cm was used as a neutron attenuator and for cosmic rays lead of thickness 10 cm on sides of HpGe detector. Total time of the run was about 9 hours. Total number of counts: 658, 012. The source was Cf-252 without lead container of 60μCi activity.