Difference between revisions of "D2O photodisintegration simulation"

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[[File:D2_neutron_yield2.gif | 500 px]] [[File:D2_neutron_yield_cut.gif | 450 px]]
 
[[File:D2_neutron_yield2.gif | 500 px]] [[File:D2_neutron_yield_cut.gif | 450 px]]
  
So, if we apply the energy cut in neutron spectrum which is a sum of neutrons coming from <math>O16(\gamma,n)O15</math> and <math>D_2(\gamma,n)p</math> reactions at (0MeV)<E<=5MeV, then the ratio of unpolarized photons from <math>O16(\gamma,n)O15</math> and polarized photons from <math>D_2(\gamma,n)p</math>  will be <math>855/15128=0.056</math>
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So, if we apply the energy cut in neutron spectrum which is a sum of neutrons coming from <math>O16(\gamma,n)O15</math> and <math>D_2(\gamma,n)p</math> reactions at (0MeV)<E<=5MeV, then the ratio of unpolarized photons from <math>O16(\gamma,n)O15</math> and polarized photons from <math>D_2(\gamma,n)p</math>  will be <math>855/15128=0.056</math>. In the same time we will loose

Revision as of 01:29, 11 April 2011

File:D2O photodis.pdf

File:Dustin anal.pdf

The result of GEANT4 simulation of neutron photoproduction on deuterium and oxygen-16 is presented below:

X section compare.gif


Neutron yield ([math]4\pi[/math]) from [math]D_2O[/math] (90%[math]D_2[/math] concentration) in reaction [math]O16(\gamma,n)O15[/math] is presented below. 410 neutrons initially produced got absorbed in the target (E=0MeV) and 2509 neutrons will likely escape the target. Figure in blue on the left is the total energy spectrum of neutrons created in reaction [math]O16(\gamma,n)O15[/math]. Figure in blue on the right is the neutron energy spectrum with energy cut applied.

O16 neutron yield.gif O16 neutron yield cut.gif

Neutron yield ([math]4\pi[/math]) from [math]D_2O[/math] (90%[math]D_2[/math] concentration) in reaction [math]D_2(\gamma,n)p[/math] is presented below. 857 neutrons initially produced got absorbed in the target (E=0MeV) and 16799 neutrons will likely escape the target. Figure in black on the left is the total energy spectrum of neutrons created in reaction [math]D_2(\gamma,n)p[/math]. Figure in blue on the right is the neutron energy spectrum with energy cut applied.

D2 neutron yield2.gif D2 neutron yield cut.gif

So, if we apply the energy cut in neutron spectrum which is a sum of neutrons coming from [math]O16(\gamma,n)O15[/math] and [math]D_2(\gamma,n)p[/math] reactions at (0MeV)<E<=5MeV, then the ratio of unpolarized photons from [math]O16(\gamma,n)O15[/math] and polarized photons from [math]D_2(\gamma,n)p[/math] will be [math]855/15128=0.056[/math]. In the same time we will loose