Question

fast neutrons may most easily be slowed down by which one of the following methods?

• A. Passing them through a substance rich in hydrogen
• B. allowing them to collide elastically with heavy nuclei
• C. Passing them through regular water slow them down.
• D. passing them through an increasing potential gradient space

Answer 1

The correct option is C Passing them through regular water slow them down.

Commonly used moderators in order to slow down the fast moving neutrons are- regular/light water, solid graphite and heavy waters.

$\therefore$ Provided in the options

Passing them through regular water slow them down.