Page 56 - 77_ex
P. 56
RADIACTIVIDAD
I+-%/B!<+!I-/7/$>'+!,/!C$?]]]!F:/9+!:$!I+I/<!I-'6&-,'+<!/$!<+!+>%'P',+,!%&%+<!,/!<+7!
+9:+7B!$&!78<&!I&-!7:!I-&I'+!-+,'+>%'P',+,!7'$&!I&-j:/!/7!/<!I-/>:-7&-!,/!:$+!7/-'/!
,/!-+,'&$:></',&7!,/!I/-'&,&7!,/!7/6',/7'$%/9-+>'8$!>&-%&7B!%+</7!>&6&!/<!40?]\`!
hS\X]! u! ]fB^! 6'$:%&7i! =! .'?]\`! hS\X]! u! \cB^! 6'$:%&7iB! j:/! >&$%-'0:=/$! /$! 9-+$!
6/,',+!+!<&7!P+<&-/7!,/!+>%'P',+,!/$>&$%-+,+!/$!<+7!+9:+7)!
R<!C$?]]]!I/-%/$/>/!+!<+!7/-'/!-+,'+>%'P+!,/<!l?]b^B!@&-6+!I+-%/!,/!<&7!9+7/7!
$&0</7B!9-:I&!,/!/</6/$%&7!j:N6'>&7!,/!6:=!I&>+!-/+>%'P',+,!j:N6'>+B!I&-!<&!j:/!
7:!,'7&<:>'8$!=!+--+7%-/!I&-!/<!+9:+!7/!-/+<'3+!6/,'+$%/!I-&>/7&7!@N7'>&7)!
(&7! 61%&,&7! ,/! 6/,',+! o'$! 7'%:p! /$! /<! I-&I'&! 6+$+$%'+<! 7&$! 6/$&7!
7/$7'0</7!=!I-/>'7&7!j:/!<&7!61%&,&7!,/!,/%/-6'$+>'8$!,/!-+,8$!/$!/<!<+0&-+%&-'&B!
j:/!/7!>&6&!7/!W+$!-/+<'3+,&)!4+-+!/<<&!7/!-/j:'/-/!:$+!%&6+!,/!6:/7%-+!,/!+9:+!
/$! /<! 0+<$/+-'&! 7'$! I1-,',+7! ,/! -+,8$B! :%'<'3+$,&! I+-+! <+! 6'76+! :$! -/>'I'/$%/!
W/-61%'>+6/$%/!>/--+,&)!
(+! ,/%/-6'$+>'8$! ,/<! C$?]]]! 7/! -/+<'3+! I&-! 6/,',+! ,'-/>%+! 6/,'+$%/! <+!
%1>$'>+!,/!/7I/>%-&6/%-N+!9+66+!,/<!/$P+7/!j:/!>&$%'/$/!<+!6:/7%-+)!R<!>L<>:<&!,/!
<+!+>%'P',+,!7/!-/+<'3+!7&0-/!<&7!@&%&I'>&7!,/<!40?]\`!=!.'?]\`B!/$!/j:'<'0-'&!>&$!/<!
C$?]]]! hbi)! R<! /j:'I&! :%'<'3+,&! /7! :$! ,/%/>%&-! ,/! 9/-6+$'&! '$%-N$7/>&! o-/P/-7/p!
hC/9/i! >&$! 7:! >&--/7I&$,'/$%/! >+,/$+! /</>%-8$'>+! +7&>'+,+)! R<! ,/%/>%&-! /7%L!
-&,/+,&!>&$!:$!0<'$,+F/!,/!I<&6&!,/!\_!>6!,/!/7I/7&-!I+-+!-/,:>'-!/<!@&$,&)!
R<!/$P+7/!:%'<'3+,&!I+-+!<+!%&6+!,/!6:/7%-+B!%-+$7I&-%/!=!6/,',+!,'-/>%+!,/!
<+! +>%'P',+,! W+! 7',&! %'I&! o;+-'$/<<'pB! >&$! /<! j:/! 7/! &0%'/$/! :$! 6LZ'6&! ,/!
7/$7'0'<',+,!+$+<N%'>+)!
:1.[[I(
R<! C+?]]f! /7! :$! -+,'&$:></',&! /6'7&-! +<@+! >&$! :$! I/-'&,&! ,/!
7/6',/7'$%/9-+>'8$! S\X]! u! \f__! +U&7! =! /7! /<! I-/>:-7&-! ,/<! C$?]]])! 2:!
,/%/-6'$+>'8$! /$! +9:+! 7/! -/+<'3+! 7/9g$! /<! I-&>/,'6'/$%&! $&-6+<'3+,&! h`i!
6/,'+$%/!:$+!7/I+-+>'8$!-+,'&j:N6'>+!,/<!-+,'&!:%'<'3+$,&!I&-%+,&-!,/!0+-'&)!(+7!
6/,',+7! 7/! -/+<'3+$! >&$! :$! ,/%/>%&-! ,/! 7:<@:-&! ,/! >'$>! +! ,'7%'$%&7! '$%/-P+<&7! ,/!
%'/6I&! +! I+-%'-! ,/<! 6&6/$%&! ,/! 7/I+-+>'8$! =! 6/,'+$%/! /<! I<+$%/+6'/$%&! =!
-/7&<:>'8$!,/!:$!7'7%/6+!,/!/>:+>'&$/7!7'6:<%L$/+7!7/!&0%'/$/$!<+7!+>%'P',+,/7!,/!
C+?]]f!=!C+?]]`)!
K.[SYX(K.[SUX(K.[SW(
(&7! '78%&I&7! ,/! :-+$'&! 7/! W+$! ,/%/-6'$+,&! :%'<'3+$,&! <+! %1>$'>+! ,/!
/7I/>%-&6/%-N+! +<@+B! I-/P'+! 7/I+-+>'8$! -+,'&j:N6'>+! =! ,/I&7'>'8$! /</>%-&<N%'>+!
7&0-/!:$!,'7>&!,/!+>/-&!'$&Z',+0</B!:%'<'3+$,&!>&6&!I+%-8$!'$%/-$&!/<!l?]b]!hdi)!
53