0.15 



0.10 



^0.09 



H0.08 



E 

 en 



0.07 o 



0.06 g 



c 



o 



0.05 



0.04 



- 0.03 



- 0.025 



Atomic number (Z) 



Fig. (1-1)18. Mass absorption coefficient of X rays [from D. G. Chappell, 

 Nucleonics, 14, 40 (January, 1956); by permission]. 



20 



