IVANSKYI, V. B.; LETUCHYY, O. N.; OrobinskyiА. N.; SIROKO, H. V. MEASUREMENT OF THE MAIN CHARACTERISTICS OF PuBe AND 238PuBe NEUTRON SOURCES USING BONNER SPHERE SPECTROMETER WITH A 3He-COUNTER. East European Journal of Physics, v. 4, n. 2, p. 53-65, 1 Aug. 2017.