Reflector;Beryllium;"Beryllium oxide";"Zirconium hydride";"SGT graphite";"VPG graphite";Water "Activity of produced 99Мо, 1013 Bq";4.55±0.09;4.37±0.09;4.29±0.09;4.14±0.08;4.25±0.09;4.37±0.09