._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron capture. It is known that ._(29)^(64) Cu has a half life of 12.8 hrs with 40% probability of beta^(-) decay 20% probability of beta^(+) decay and 40% probability of electron capture. The mass of ._(29)^(64) Cu is 63.92977amu whil e ._(30)^(64) Zn is 63.92914 amu and ._(28)^(64) Ni is 63.92796 amu. What is the Q value of beta^(-) decay?

._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron

1.	._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron capture. It is known that ._(29)^(64) Cu has a half life of 12.8 hrs with 40% probability of beta^(-) decay 20% probability of beta^(+) decay and 40% probability of electron capture. The mass of ._(29)^(64) Cu is 63.92977amu whil e ._(30)^(64) Zn is 63.92914 amu and ._(28)^(64) Ni is 63.92796 amu. What is the Q value of beta^(-) decay?
Answer» `0.587` MEV `0.077` MeV `1.686` Me V `0.666` Me V Solution :`Q-(63.92977-63.92914)xx931.5` `=0.00063xx931.5=0.587` MeV

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