Column of Water Length: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 3: | Line 3: | ||
e <sup>-n σ t </sup> | e <sup>-n σ t </sup> | ||
<math>n = \frac{atoms}{cm ^{3}} => \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times | <math>n = \frac{density}{weight(mols)} \times N = \frac{atoms}{cm^{3}}</math> | ||
<math>n = \frac{atoms}{cm ^{3}} => \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times \frac{atoms}{mol} => \frac{atoms}{cm^{3}}</math> | |||
Revision as of 14:56, 16 July 2008
Column of Water Needed to Cut Photon Count in Half at 10 MeV
e -n σ t
[math]\displaystyle{ n = \frac{density}{weight(mols)} \times N = \frac{atoms}{cm^{3}} }[/math]
[math]\displaystyle{ n = \frac{atoms}{cm ^{3}} => \frac{ \frac{g}{cm^{2}} }{ \frac{g}{mol}} \times \frac{atoms}{mol} => \frac{atoms}{cm^{3}} }[/math]