TY JOUR TI Prospects for Range Extension of Large Area Sources with Alpha/Beta-Emitting Radionuclides, Precision Factors KW state system for ensuring the uniformity of measurements KW instrument testing KW large area sources KW emission rate of beta and alpha particles in 2p sr solid angle KW source uniformity KW measurements uncertainty JO ANRI AU Shil'nikova, T.I. AU Alekseev, I.V. AU Arshanskiy, S.M. AU Zhukov, G.V. AU Zanevskiy, A.V. AU Moiseev, N.N. AU Osokina, A.A. AU Sepman, S.V. AU Tereschenko, E.E. PY 2021 IS 0 PB Scientific-Production Enterprise “Dosa”