Column of Water Length: Difference between revisions
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==Column of Water Needed to Cut Photon Count in Half at 10 MeV== | ==Column of Water Needed to Cut Photon Count in Half at 10 MeV== | ||
< | e <sup>-n σ t </sup> | ||
<math>n = \frac{atoms}{cm ^{3}} => \frac{\frac{g}{cm^{2}}{\frac{g}{mol | <math>n = \frac{atoms}{cm ^{3}} => \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times 6.022 \cdot 10^{23} \frac{atoms}{mol} => \frac{atoms}{cm^{3}}</math> | ||
Revision as of 12:03, 16 July 2008
Column of Water Needed to Cut Photon Count in Half at 10 MeV
e -n σ t
[math]\displaystyle{ n = \frac{atoms}{cm ^{3}} => \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times 6.022 \cdot 10^{23} \frac{atoms}{mol} => \frac{atoms}{cm^{3}} }[/math]