Radiation HW on Alpha Particles

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SUMMARY

The discussion focuses on calculating the energy required for an alpha particle to penetrate the epidermal layer of skin, estimated at a thickness of 7 mg/cm². Two equations are presented: R=0.56E and R=1.24E^-2.62, with the first yielding an energy of 12 mEV and the second resulting in 7.8 mEV. The user expresses uncertainty about the correctness of their calculations and the appropriateness of the equations used. Ultimately, the second equation appears to provide a more accurate estimate for the energy needed.

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  • Understanding of alpha particle radiation
  • Familiarity with energy calculations in electronvolts (eV)
  • Knowledge of the concept of linear energy transfer (LET)
  • Basic proficiency in algebra for solving equations
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  • Study the concept of linear energy transfer (LET) in radiation physics
  • Learn about different equations used for calculating radiation penetration
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Homework Statement



How much energy does an alpha particle need to penetrate the minimal protective epidermal layer of skin (Thickness ~7 mg cm-2



Homework Equations



Possibly R=0.56E, E,4
OR R=1.24E-2.62, 4<E<8


The Attempt at a Solution



I used the equation R=0.56E
so, I said that:

7 mg/cm^2=0.56E
then divided by 0.56 to get E=12.mEV

I guess I'm just not sure if I used to correct equation and am confused if the units match up.

Thanks for your help!
 
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I think it may be correct if I use to other formula actually. 7 mg/cm^2=1.24E-2.62
Do the math and it equals 7.8 mEv. Sound like a better answer?
Thanks!
 

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