"o "upr""..rt a significant hazard. to living organisms and radiat ion-".rr"itilru eiectronic systenrs. The initiaL (and residual) radiation can be varied within a co.r"iaeranu range for veapons of the same total yield., as is discussed in section 3.1.3, Initial" rad.iation neutrons will furthermore induce sorne radioactivity in the Joir *"o,*a g.or-d-r.".1^ tn" extent of vhich largely depend.s upon the chenical "o.fo"itlon of the soi1. 25' The most inportant quantity for assessing radiation inJury or dsnage is cafled"dosei', which is the amount of- radiation enu.ly rl"orled per unit mass of the absorbing material. Dose revels associateJ ,riitr ',r."iorr" ;"g";"; o;-;;diation injury :1"*i."" and ottrer living organisms are ai"".,"""a in sectiJn 7 oi-ttu-pre"unt 26. I{hen travel_l_ing in the air, radiation wil]. be attenuateal rapidly rith increasing distance fxom.grounar zero. ?hus, the difference betveen distances r,There a lethal dose and a negligible dose of initiar radiation virr be """"i.,r"a is fairly snalf. Generally speaking about l+00 to gOO ,. (0.25_0.1+0 niles) will reduce the dose by a factor of to. _Hence-goo to 1,200 n. io.:_o.A ,fi." i -ri,rii-r-eiuc e i.t ly about a factor of fOO. This distance 'r"i.s--"one*t at vith the yield and the .istance from the veapon, being l-arger ror larger yield .weapons. some dose-d_istance relationships are indicated in-figuie a,l. ---' 27' As the height of burst increases from a tov air b'rst to a high air burst, the s-uount of radiation reaching the _ground rapidry diroinishes. A r- I,{t. bu}st at an artitude of 5 km' (3 mites) would give a negrigitle dose at grounal zero and so vould a 100 kt. burst at an altitude of roughly t*"f.rl te.: nlfesi.---*'* -"-" 28' rn addition to living organisns, electronic conponents co.,1d be quite sensitive Lo initiaf radiation' 'rhile -of der. type equ-LFnent is resistant even to hidh ^^-^^ ro9:."_ large-scare integrated 