Hotting up

D I R T Y C H I M N E Y
B Y G O N E E U R O P E
B A S I L W I L H E L M
E A T P E B B L E N U T
N E V E R S A Y F I R E
I D L E B O N E N I N E
R E S P O N S E T I M E
O P E N A P H I D W A R
U T M O S T B O U N C E
L E A G U E I C E M A N
F L O R I D C H E E K S
N O D A R T S T O D A Y

In the word search are hidden the names of 8 elements whose initial letter spell the word of a type of radiation.

Click here for the answers.