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Консультация № 196993
06.11.2019, 17:58
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Вычислите энергию ядерной реакции 7 3Li + 1 1H→ 4 2He + 4 2He.
Вычислите энергию ядерной реакции 7 3Li + 1 1H→ 4 2He + 4 2He.
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Обсуждение
10.11.2019, 17:51
общий
это ответ
Здравствуйте, Polnolyniay!
Дано : Уравнение ядерной реакции 73Li + 11H [$8594$] 42He + 42He
Вычислить энергию этой ядерной реакции.
Решение : Эта реакция осуществляется при бомбардировке лития 73Li ускоренными протонами 11p (Лит1, стр 618).
Получим дефект массы реакции (Лит1 с642)
[$916$]M = (MLi + Mp) - (MHe + MHe) = (7,01600 + 1,00728) - 2·4,00387 = 0,016 а.е.м.
Здесь MLi=7,01600 а.е.м. - масса ядра изотопа лития 73Li в атомных единицах массы (см ru.wikipedia.org/wiki/Изотопы_лития )
Mp = 1,00728 а.е.м. - масса протона, MHe = 4,00387 а.е.м. - масса ядра гелия 42He (Лит1, стр 642).
(1 а.е.м. = 1,6605402·10-27 кг)
Одной атомной единице массы соответствует энергия E1 = 931 МэВ (вывод из формулы Энштейна E = [$916$]m·c2 ).
Значит, искомая энергия, выделяющаяся в результате ядерной реакции
W = E1·[$916$]M = 931·0,016 = 14,468 МэВ = 2,315·10-12 Дж
(1 МэВ = 106 эВ = 1,6·10-13 Дж)
W>0 , значит, энергия выделяется (не поглощается).
Ответ: Энергия ядерной реакции W=14 МэВ
Литература1 - учебник "Физика в средней школе" АксеновичЛА, РакинаНН, ФариноКС , Минск 2004.
Решения похожих задач : "Энергия ядерной реакции" Ссылка2 ,
"Вычислить энергию ядерной реакции" Ссылка3
Если возникнут вопросы, задавайте их в мини-форуме.
Дано : Уравнение ядерной реакции 73Li + 11H [$8594$] 42He + 42He
Вычислить энергию этой ядерной реакции.
Решение : Эта реакция осуществляется при бомбардировке лития 73Li ускоренными протонами 11p (Лит1, стр 618).
Получим дефект массы реакции (Лит1 с642)
[$916$]M = (MLi + Mp) - (MHe + MHe) = (7,01600 + 1,00728) - 2·4,00387 = 0,016 а.е.м.
Здесь MLi=7,01600 а.е.м. - масса ядра изотопа лития 73Li в атомных единицах массы (см ru.wikipedia.org/wiki/Изотопы_лития )
Mp = 1,00728 а.е.м. - масса протона, MHe = 4,00387 а.е.м. - масса ядра гелия 42He (Лит1, стр 642).
(1 а.е.м. = 1,6605402·10-27 кг)
Одной атомной единице массы соответствует энергия E1 = 931 МэВ (вывод из формулы Энштейна E = [$916$]m·c2 ).
Значит, искомая энергия, выделяющаяся в результате ядерной реакции
W = E1·[$916$]M = 931·0,016 = 14,468 МэВ = 2,315·10-12 Дж
(1 МэВ = 106 эВ = 1,6·10-13 Дж)
W>0 , значит, энергия выделяется (не поглощается).
Ответ: Энергия ядерной реакции W=14 МэВ
Литература1 - учебник "Физика в средней школе" АксеновичЛА, РакинаНН, ФариноКС , Минск 2004.
Решения похожих задач : "Энергия ядерной реакции" Ссылка2 ,
"Вычислить энергию ядерной реакции" Ссылка3
Если возникнут вопросы, задавайте их в мини-форуме.
5
спасибо за решение
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