d ov ich , ▁a ▁principal ▁nuclear ▁the or ist ▁( and ▁well - known ▁cosm ologist ) ▁who ▁was ▁direct ing ▁research ▁groups ▁at ▁K B - 1 1 ▁and ▁the ▁Institute ▁of ▁Chem ical ▁Physics . ▁▁ ▁During ▁the ▁development ▁of ▁the ▁R DS - 2 2 0 , ▁Rab in ov ich ▁became ▁concerned ▁that ▁the ▁device ▁would ▁not ▁work ▁and ▁shared ▁his ▁wor ries ▁with ▁colle agues ▁before ▁raising ▁them ▁with ▁his ▁super iors . ▁His ▁concerns ▁were ▁taken ▁so ▁seriously ▁that ▁after ▁discussion ▁with ▁the ▁project ▁design ▁leads ▁Vik tor ▁Adam sky ▁and ▁V y aches lav ▁Fe odor it ov , ▁and ▁chief ▁weapons ▁designer ▁And rei ▁Sak har ov , ▁all ▁of ▁whom ▁provided ▁counter - arguments , ▁Sak har ov ▁- ▁one ▁of ▁the ▁chief ▁design ers ▁- ▁alter ed ▁the ▁design ▁of ▁the ▁bomb ▁to ▁reduce ▁the ▁marg ins ▁of ▁error ▁in ▁calculating ▁the ▁processes ▁which ▁had ▁v ex ed ▁Rab in ov ich . ▁ ▁He ▁author ed ▁papers ▁on ▁electron - pos it ron ▁pair ▁production ▁and ▁( with ▁Zel ' d ov ich ) ▁statistical ▁formula e ▁in ▁a ▁F erm i ▁gas . ▁Later , ▁he ▁became ▁a ▁deput y ▁director ▁of ▁the ▁W ave ▁Research ▁Centre ▁in ▁Moscow , ▁an ▁off sh oot ▁of ▁the ▁Leb ede v ▁Phys ical ▁Institute ▁of ▁the ▁Russian ▁Academy ▁of ▁Sciences . ▁ ▁References ▁ ▁Category : Russ ian ▁phys ic ists ▁Category : Russ ian ▁mathemat icians ▁Category : S ov iet