Neutron energy resolution in NaI detector: Difference between revisions
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<math> E_n = \frac{m}{2}\left( \frac{d}{t_n} \right)^2 </math> | <math> E_n = \frac{m}{2}\left( \frac{d}{t_n} \right)^2 </math> | ||
<math> \delta E_n = -2\ E_n \ | <math> \delta E_n = -\frac{2 \sqrt{2}}{\sqrt{m} d}\ E_n^{3/2} \delta t_n </math> | ||
[[File:Na 22 timing.jpg | 400px]] | |||
* <math> \delta t_n = 15\ ns</math> | |||
* <math> mc^2 = 938\ MeV </math> | |||
<math> d = 0.5\ m: \ \ \ ( \delta E_n/E_n ) = 0.83\ E_n^{1/2}\ MeV </math> | |||
<math> d = 0.7\ m: \ \ \ ( \delta E_n/E_n ) = 0.59\ E_n^{1/2}\ MeV </math> | |||
<math> d = 1.0\ m: \ \ \ ( \delta E_n/E_n ) = 0.42\ E_n^{1/2}\ MeV </math> | |||
<math> d = 1.5\ m: \ \ \ ( \delta E_n/E_n ) = 0.28\ E_n^{1/2}\ MeV </math> | |||
<math> d = 2.0\ m: \ \ \ ( \delta E_n/E_n ) = 0.21\ E_n^{1/2}\ MeV </math> | |||
[[File:NaI_energy_resolut.png | 450px]] | |||
[[File:NaI_energy_resolut_4.png | 450px]] | |||
Latest revision as of 21:44, 28 April 2012
[math]\displaystyle{ E_n = \frac{m}{2}\left( \frac{d}{t_n} \right)^2 }[/math]
[math]\displaystyle{ \delta E_n = -\frac{2 \sqrt{2}}{\sqrt{m} d}\ E_n^{3/2} \delta t_n }[/math]
- [math]\displaystyle{ \delta t_n = 15\ ns }[/math]
- [math]\displaystyle{ mc^2 = 938\ MeV }[/math]
[math]\displaystyle{ d = 0.5\ m: \ \ \ ( \delta E_n/E_n ) = 0.83\ E_n^{1/2}\ MeV }[/math] [math]\displaystyle{ d = 0.7\ m: \ \ \ ( \delta E_n/E_n ) = 0.59\ E_n^{1/2}\ MeV }[/math] [math]\displaystyle{ d = 1.0\ m: \ \ \ ( \delta E_n/E_n ) = 0.42\ E_n^{1/2}\ MeV }[/math] [math]\displaystyle{ d = 1.5\ m: \ \ \ ( \delta E_n/E_n ) = 0.28\ E_n^{1/2}\ MeV }[/math] [math]\displaystyle{ d = 2.0\ m: \ \ \ ( \delta E_n/E_n ) = 0.21\ E_n^{1/2}\ MeV }[/math]
