What is the Q-value of the β- decay of Ni-65?

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Homework Help Overview

The discussion revolves around calculating the Q-value of the β- decay of Ni-65, utilizing atomic masses of Ni-65 and Cu-65. The problem is situated within the context of nuclear physics and decay processes.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the Q-value using the difference in atomic masses of the reactants and products. Some participants question the correctness of the mass values used and the inclusion of units in the calculations.

Discussion Status

The discussion is ongoing, with participants providing feedback on the original poster's calculations and raising questions about the accuracy of the mass values. There is an indication of productive engagement, as participants are addressing specific aspects of the attempt.

Contextual Notes

There is mention of potential errors in the mass values used for Ni-65, and the need for clarity regarding units in the calculations. The original poster's answer is noted to be close but not correct, indicating a need for further exploration of the calculations.

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Homework Statement



Using the atomic masses of 65Ni and 65Cu, calculate the Q-value of the β- decay of 65Ni (in MeV).
Answer = c) 2.14 MeV

Homework Equations



65Ni -> 65Cu + e-

The Attempt at a Solution



64.9308 -> 64.9277 + 0.0005485
Products - Reactants
-0.0025515 * 931.5 = 2.3767

My answer is in the same ball park but not correct. Are my equations correct?
 
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Last edited:
Please put units into your attempt.
 
Also, assuming your masses are in atomic mass units, you have used the wrong mass for Ni-65.
 

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