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`""_(10)^(23)"Ne"` नाभिक के `beta`- क्षय के बाद `""_(11)^(23)"Na"` में रूपांतरित होता है | उत्सर्जित इलेक्ट्रॉनों की अधिकतम गतिज ऊर्जा की गणना कीजिए | यह मान लीजिए की संतति नाभिक और एंटीन्यूट्रिनों की गतिज ऊर्जा नगण्य है |
`""_(10)^(23)"Na"` का द्रव्यमान = 22.994466 u.
`""_(11)^(23)"Na"` का द्रव्यमान = 22.989770 u
`1u=931.5" MeV"//"c"^(2).`

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Correct Answer - 4.37 MeV
`""_(10)^(23)"Ne"to""_(11)^(23)"Na"+e^(-)+bar(v)+Q`.
`DeltaM=m(""_(10)^(20)"Ne")-[m(""_(11)^(23)"Na")+m(e^(-))]`
`=0.004696" u",m(e^(-))` का मान नगण्य होता है |
`:." "E_("max")=Delta" M.c"^(2)`
`=0.004696xx931.5("MeV")/(c^(2))xx c_(2)=4.37"MeV."`

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