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The Leakage neutron multiplication in bulk lead has been measured using the total absorption detector and relative method.The polyethylene sphere of 138 cm in diameter is used as the moderator and total absorption detector.The measured results from ~(55)Mn foils and ~6Li glass are compared.The neutron multiplication is 1.74 with the lead shell of 23.1 cm thick.The measured result is consistent with the calculated one with ANISN code and ENDF/B-6 evaluated data within the experimental error.
The Leakage neutron multiplication in bulk lead has been measured using the total absorption detector and relative method. The polyethylene sphere of 138 cm in diameter is used as the moderator and total absorption detector. The measured results from ~ (55) Mn foils and ~ 6 Li glass are compared. The neutron multiplication is 1.74 with the lead shell of 23.1 cm thick. The measured result is consistent with the calculated one with ANISN code and ENDF / B-6 evaluated data within the experimental error.