Pop ulated ▁places ▁in ▁Bo j n ord ▁County <0x0A> </s> ▁N uc lear ▁interaction ▁length ▁is ▁the ▁mean ▁distance ▁travel led ▁by ▁a ▁had ron ic ▁particle ▁before ▁under going ▁an ▁in el astic ▁nuclear ▁interaction . ▁ ▁See ▁also ▁N uc lear ▁collision ▁length ▁Rad iation ▁length ▁ ▁External ▁links ▁Part icle ▁Data ▁Group ▁site ▁ ▁Category : Ex perimental ▁particle ▁physics <0x0A> </s> ▁Alexander ▁Vik tor ov ich ▁F ok ▁( also ▁F och ) ▁ ▁; ▁September ▁ 6 , ▁ 1 8 4 3 ▁– ▁ 1 9 2 6 ▁) ▁was ▁a ▁lieutenant ▁general ▁of ▁the ▁Imperial ▁Russian ▁Army ▁during ▁the ▁Rus so - J apan ese ▁War . ▁ ▁Biography ▁F ok ▁graduated ▁from ▁the ▁Konst antin ov sk oe ▁Art illery ▁School ▁in ▁St . ▁Petersburg ▁in ▁ 1 8 6 4 , ▁and ▁from ▁ 1 8 7 1 - 1 8 7 6 ▁served ▁in ▁the ▁Special ▁Corps ▁of ▁G end arm es , ▁an ▁el ite ▁uniform ed ▁security ▁police ▁force ▁responsible ▁for ▁state ▁security . ▁From ▁ 1 8 7 7 - 1 8 7 8 , ▁he ▁saw ▁combat ▁in ▁the ▁Rus so - T urk ish ▁War . ▁From ▁ 1 9 0 0 , ▁F ok ▁was ▁commander ▁of ▁the ▁ 4 th ▁East ▁Si ber ian ▁R if le ▁Brigade , ▁and ▁participated ▁in ▁the ▁supp ression ▁of ▁the ▁Box er ▁Reb ell ion . ▁ ▁During ▁the ▁Rus so - J apan ese ▁War , ▁F