TY JOUR TI New Algorithm for Upgrading of Portal Radiation Monitors with Plastic Detectors. Part 4. Improvement of Algorithm by Using of Collimators KW portal radiation monitor KW collimator KW minimum detectable activity KW distance of detection of radioactive source JO ANRI AU Stavrov, A.I. PY 2022 IS 0 PB Scientific-Production Enterprise “Dosa”