Measurements and calculations of {sup 235}U, {sup 239}Pu, {sup 232}Th neutron transmissions in energy range 2.15eV-14MeV for temperatures 77{degrees} and 293{degrees}

The neutron transmissions for {sup 235}U, {sup 239}Pu and {sup 232}Th metal samples as the functions of sample thicknesses has been measured on the 123m and 1006m flight paths of the IBR-30 booster (JINR,Dubna) in neutron energy range 2eV-14MeV. The measurements have been carried out for liquid nitrogen ({open_quotes}cold{close_quotes}) and room ({open_quotes}hot{close_quotes}) temperatures of filter samples. The batteries of 3 boron counters and 26 helium counters have been used as detectors. Analogous transmissionshave been calculated from the BROND-2, ENDF/B-6 and JENDL-3 evaluated data libraries by means of the GRUCON computer program package.