試題詳解

23. Which of the following techniques is not correct in producing X-rays?
(A) bombardment of a metal target with a beam of high-energy electrons
(B) use of a radioactive source to excite a metal target
(C) excitation of a metal target through chemical reactions
(D) from a synchrotron radiation source
(E) irradiation of a metal target with a primary X-ray source