Difference between revisions of "Column of Water Length"

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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==
  
<math> e^{-n \sigma t} </math>
+
e <sup>-n σ t </sup>
  
<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>
+
<math>n = \frac{density}{weight(mols)} \times N = \frac{atoms}{cm^{3}}</math>
 +
 
 +
<math>n = \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times \frac{atoms}{mol} => \frac{atoms}{cm^{3}}</math>
 +
 
 +
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Latest revision as of 06:26, 5 February 2009

Column of Water Needed to Cut Photon Count in Half at 10 MeV

e -n σ t

[math]n = \frac{density}{weight(mols)} \times N = \frac{atoms}{cm^{3}}[/math]

[math]n = \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times \frac{atoms}{mol} =\gt \frac{atoms}{cm^{3}}[/math]

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