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Which of the following is not a source of production for gamma rays?

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Which of the following is not a source of production for gamma rays?

(a) Cobalt-60

(b) Iridium-192

(c) Caesium-167

(d) Americium-241

The question was asked in final exam.

The query is from Radiography topic in portion Non Destructive Techniques of Casting-Forming-Welding II

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Correct choice is (d) Americium-241

Explanation: Among all the above given isotopes, a Cobalt – 60 isotope, Iridium-192 isotope and a Caesium-167 isotope are mainly used for producing gamma rays but not Americium-241 isotope, it is used for making alpha rays.

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