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 mmThis question was posed to me in an interview.My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II

What should the diameter of a Cobalt-60 source used for producing gamm

1.	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 mmThis question was posed to me in an interview.My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II
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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 mmThis question was posed to me in an interview.My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II

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