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Консультация № 171177
09.08.2009, 11:38
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1
Здравствуйте уважаемые эксперты, помогите пожалуйста решить задачу:
Энергия рентгеновских лучей e1 = 0.6 МэВ. Найти кинетическую энергию электрона отдачи, если длина волны рентгеновских лучей после комптоновского рассеяния изменилась на 20%.
Энергия рентгеновских лучей e1 = 0.6 МэВ. Найти кинетическую энергию электрона отдачи, если длина волны рентгеновских лучей после комптоновского рассеяния изменилась на 20%.
Обсуждение
10.08.2009, 09:24
общий
это ответ
Здравствуйте, Чаркин Иван Александрович.
При рассеянии рентгеновских лучей веществом рассеянные рентгеновские лучи имеют большую длину волны, чем падающие (эффект Комптона). Если обозначить через λ1 длину волны падающего фотона, а через λ2 длину волны рассеянного фотона, то по условию λ2 = 1,2λ1.
Энергия электрона отдачи равна разности энергий падающего и рассеянного фотонов:
W = e1 – e2 = hc/λ1 – hc/λ2 = hc/λ1 – hc/(1,2λ1) = hc/λ1 ∙ (1 – 1/1,2) = hc/(6λ1) = e1/6 = 0,6/6 = 0,1 (МэВ).
Ответ: 0,1 МэВ.
С уважением.
При рассеянии рентгеновских лучей веществом рассеянные рентгеновские лучи имеют большую длину волны, чем падающие (эффект Комптона). Если обозначить через λ1 длину волны падающего фотона, а через λ2 длину волны рассеянного фотона, то по условию λ2 = 1,2λ1.
Энергия электрона отдачи равна разности энергий падающего и рассеянного фотонов:
W = e1 – e2 = hc/λ1 – hc/λ2 = hc/λ1 – hc/(1,2λ1) = hc/λ1 ∙ (1 – 1/1,2) = hc/(6λ1) = e1/6 = 0,6/6 = 0,1 (МэВ).
Ответ: 0,1 МэВ.
С уважением.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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