Final-1

Final-1 - 22:01 Introduction to Ionizing Radiation Final...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
22:01 Introduction to Ionizing Radiation Final Examination Friday, 19 December 2008 Name: _______________________ This examination consists of 16 questions. Several pages of useful material are included at the end. Points awarded for each correct answer are noted on the left side of each question, for a total of 100 points. Answer all questions in the space provided and indicate, if necessary, if an answer continues on the back of the paper. This is a closed book examination. 1. Circle the correct statement(s): 2 (a) 116 In is an isotone of 114 In, an isobar of 116 Sn, and an isomer of 116m In. (b) 116 In is an isotone of 115 Cd, an isobar of 117 In, and an isotope of 116 Cd. (c) 116 In is an isotone of 115 Sn, an isobar of 116 Cd, and an isotope of 115 In. (d) 116 In is an isotone of 113 Pd, an isobar of 116 Sn, and an isomer of 116m In. 2. Which particle will have the larger range in a given material: 4 He ++ or 4 He + ? Explain your answer. 4 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. Distinguish between the “direct” and “indirect effects” of ionizing radiation. 4 4. A 10 MeV alpha particle in water produces a delta ray with energy equal to 0.9 Q max. What is the range of the alpha particle and what is the range of the delta ray? 4 2
Background image of page 2
5. Iodine-125, a widely used isotope in the practice of nuclear medicine, has a half-life of 60 days. (a) What mode of decay do you think this isotope undergoes? And why ? (b) How long will it take for a 4 MBq source to decrease to 0.1 % of its initial activity? 6 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. The isotope 126 I can decay by EC, β - , and β + transitions. (a) Calculate the Q values for the three modes of decay to the ground states of the daughter nuclei. 8
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/09/2010 for the course 22 22.01 taught by Professor Smith during the Fall '09 term at MIT.

Page1 / 15

Final-1 - 22:01 Introduction to Ionizing Radiation Final...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online