ionization chamber with 252Cf neutron sourceNeutron leakage spectra from PB-LI sphere with central 252CF- and 14 MEV-neutron sources and verification of evaluated neutron data 4/04/2015 2015 - #01 Physics in nuclear power engineering Blokhin A.I. Zhuravlev B.V. Talalaev V.A. Sipachev I.V.