Question: 2 - 9 . Gamma rays interacting with ? 4 9 B e or ? 1 2 H produce photoneutrons. Write the reaction equation for

2-9. Gamma rays interacting with ?49Be or ?12H produce "photoneutrons." Write
the reaction equation for each and calculate the threshold gamma energy. (Use
mass data from Table 2-4).
2 - 9 . Gamma rays interacting with ? 4 9 B e or

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