問題詳情

54.經直線加速器的加速管（accelerator tube）加速的電子，聚焦後直徑約為多少mm？
(A)0.3
(B)3
(C)30
(D)300

參考答案

答案：B
難度：適中0.551724
統計：A(7),B(16),C(5),D(1),E(0)

用户評論

【用戶】Steven Huang

【年級】大四上

【評論內容】出處：放射治療物理學 5/e p.44As the high-energy electrons emerge from the exit window of the accelerator structure, they are in the form of a pencil beam of about 3 mm in diameter(以3mm直徑的筆型射束型式射出). In the low-energy linacs (up to 6 MV) with relatively short accelerator tube, the electrons are allowed to proceed straight on and strike a target for x-ray production.

【用戶】Steven Huang

【年級】大四上

【評論內容】出處：放射治療物理學 5/e p.44As the high-energy electrons emerge from the exit window of the accelerator structure, they are in the form of a pencil beam of about 3 mm in diameter(以3mm直徑的筆型射束型式射出). In the low-energy linacs (up to 6 MV) with relatively short accelerator tube, the electrons are allowed to proceed straight on and strike a target for x-ray production.