. . . "http://nuclearpowertraining.tpub.com/h1013v2/css/h1013v2_32.htm"^^ . . . . . . . . . . . . . . . . . "L_s" . . . . . . . . "Slowing-Down Length"@en . . . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ . . . . . "\"Slowing-Down Length\" is the average straight-line distance that a fast neutron will travel between its introduction into the slowing-downmedium (moderator) and thermalization." . . . . . . .