Question

What should the diameter of a Cobalt-60 source used for producing gamma rays?

(a) 2 mm

(b) 3 mm

(c) 4 mm

(d) 5 mm

This question was posed to me in an interview.

My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II

Answer 1

The correct answer is:

(a) 2 mm

Cobalt-60 sources used for producing gamma rays typically have a small diameter to ensure effective radiation exposure. A common diameter for these sources is around 2 mm, which allows for focused gamma ray production in radiography applications.