Question

9:13 PM Sun 21 Apr 51% . " 2018-2019 ACTIVITY-RADIATION PHYSICS 104 Q6:An air sample is contaminated with 150, which has a half-life of 2.03 min. One possible way to minimize its hazard is to pass it through a long pipe to allow it to decay inside the pipe until it can be safely released into the atmosphere. If the oxygen moves at a constant speed of 1.1 m/s in the pipe, how long must the pipe be for the sample to have decayed to 3.5% of its original activity just as it leaves the pipe? (Answer: 648 m) Biological Effect of Radiation Q7: In an industrial accident, a 65 kg person receives a lethal whole-body equivalent dose of 5.4 Sv from x rays (RBE-1) (540 rem) (5.4 Gy) (540 rad) (351 J) A. What is the equivalent dose (in rem)? B. what is the absorbed dose (in Gy)? C. What is the absorbed dose (in rad)? D. What is the total energy absorbed by the person's body? Q8: A person exposed to fast neutrons (RBE-10) receives a radiation dose of 300 rem on part of his hand, affecting 25 g of tissues. How many joules of energy did he receive? (7.5 m])

Answer 1

2-O3 Yi t- -d 1 00 og o 34 13 931 9.8 2min distamme 58 9.2/ = dotonu 1-1

R乃€. Absen had done x1 5.4 5.uay ㅋ Ab sor bad de 5 3 E RBE 3メ25%10-3 1 0 =