§ 40. Деление тяжелых ядер. Цепные ядерные реакции

Упражнение 26

Определите энергетический выход реакций:

а) $begin mathsize 20px style straight U presubscript 92 presuperscript 235 space plus space n presubscript 0 presuperscript 1 space rightwards arrow space Ba presubscript 56 presuperscript 145 space plus space Kr presubscript 36 presuperscript 88 space plus space 3 n presubscript 0 presuperscript 1 end style$ ;

б) $begin mathsize 20px style straight U presubscript 92 presuperscript 235 space plus space n presubscript 0 presuperscript 1 space rightwards arrow space Xe presubscript 54 presuperscript 140 space plus space straight S presubscript 38 presuperscript 94 r space plus space 2 n presubscript 0 presuperscript 1 end style$ ;

в) $begin mathsize 20px style straight U presubscript 92 presuperscript 235 space plus space n presubscript 0 presuperscript 1 italic space rightwards arrow space Rb presubscript 37 presuperscript 96 space plus space Cs presubscript 55 presuperscript 137 space plus space 3 n presubscript 0 presuperscript 1 end style$ ;

Массы изотопов (а.е.м.):

$begin mathsize 20px style Ba presubscript 56 presuperscript 145 space minus space 144 comma 92763 semicolon space Kr presubscript 26 presuperscript 88 space minus space 87 comma 91445 semicolon space apostrophe presubscript 54 presuperscript 140 Xe space minus space 139 comma 92164 semicolon space Sr presubscript 38 presuperscript 94 space minus space 93 comma 91536 semicolon space Rb presubscript 37 presuperscript 96 space minus space 95 comma 93427 semicolon space Cs presubscript 55 presuperscript 137 space minus space 136 comma 90709 semicolon space Br presubscript 35 presuperscript 87 space minus space 86 comma 92071 semicolon space La presubscript 57 presuperscript 146 space minus space 145 comma 92579. space end style$