Lets imagine this,you have pulse laser with focus lense that you use to turn air or noble gases in hermeticaly sealed chamber into plasma.To ionise air with laser,the laser beam must reach certain power,it must get past the threshold required.
Now,if we place a radioactive material,lets say Uranium 238/Thorium232/Radium cube with 1cm width 1 centimeter away from the focal point of laser beam where the plasma is created,it will cause alpha,beta and x-ray/gamma radiation in the area of focal point.
My question is this,does any of the three types of radiation mentioned present in the focal point affect the minimum ionisation energy level? Will radiation allow me to lower the power of the pulse laser and still ionise air? Lets say I need minimum of 1 microjoule to cause ionization without the radioactive material cube present,will the presence of the radiation from cube allow me to lower the power to lets say 0.9 microjoule and still get plasma?
I would like to broaden this question into three sub questions,its becose the photoionisation can happen in three ways: 1. when the laser have high enough freqency,only single photon is needed ( becose higher freqency photons have higher energy ) 2. multiphoton 3. tunnel ionisation.
For example,can it be that gamma radiation present in the focal point area lowers the multiphoton energy needed but does nothing for tunnel ionisation? Or,electron ( beta radiation ) lowers ionization threshold,but not proton,remember,beta riadiation are free electrons and protons that leave radioactive atom.
Now,if we place a radioactive material,lets say Uranium 238/Thorium232/Radium cube with 1cm width 1 centimeter away from the focal point of laser beam where the plasma is created,it will cause alpha,beta and x-ray/gamma radiation in the area of focal point.
My question is this,does any of the three types of radiation mentioned present in the focal point affect the minimum ionisation energy level? Will radiation allow me to lower the power of the pulse laser and still ionise air? Lets say I need minimum of 1 microjoule to cause ionization without the radioactive material cube present,will the presence of the radiation from cube allow me to lower the power to lets say 0.9 microjoule and still get plasma?
I would like to broaden this question into three sub questions,its becose the photoionisation can happen in three ways: 1. when the laser have high enough freqency,only single photon is needed ( becose higher freqency photons have higher energy ) 2. multiphoton 3. tunnel ionisation.
For example,can it be that gamma radiation present in the focal point area lowers the multiphoton energy needed but does nothing for tunnel ionisation? Or,electron ( beta radiation ) lowers ionization threshold,but not proton,remember,beta riadiation are free electrons and protons that leave radioactive atom.
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