Physics: Principles with Applications
Physics: Principles with Applications
6th Edition
ISBN: 9780130606204
Author: Douglas C. Giancoli
Publisher: Prentice Hall
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Chapter 31, Problem 44P
To determine

To show:About 35eV required to produce one ion pair is consistent with two definition.

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Explanation of Solution

Given data:

The two definitions of roentgen are:

1. Ion produced by the radiation is 1.6×1012 ion pairs/g ,and

2. Deposited by the radiation 0.878×102J/kg .

Start with the current definition and relate them by the value of 35eV per ion pair.

  R=(0.878×102Jkg)(1kg1000g)(1eV1.60×1019J)(1 ion pair35eV)=1.567×1012 ion pairs /g

The two values of ion pairs per gram are within about 2% of each other.

Conclusion About 35eV required to produce one ion pair is consistent with two definition.

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Physics: Principles with Applications

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