Determination of absorbed neutron dose of 241 Am-α-Be neutron source

A high-resolution semiconductor neutron spectrometer filled with 3He gas, in diode coincidence arrangement, is used for the neutron spectrum measurement of 241Am-α-Be neutron source. The neutron spectrum is evaluated from measured pulse-height distribution by using the HE3 computer code. Experiment results are compared with the spectra published by other authors. The measured spectrum provides a sufficient overlapping with the calculated one. Absorbed neutron dose rate (in tissue of standard man) is determined by measuring source neutron spectrum and absolute neutron flux and calculated conversion factors in given energy groups. (author)