1. Mar 1, 2010 #1

   akinokoe

   

   I am reading a paper on irradiation damage to semiconductor devices, the author mentioned a dose unit Mrad(Si). Can anyone tell me what it is? Thank you very much.

    

   akinokoe, Mar 1, 2010
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3. Mar 2, 2010 #2

   MaGG

   

   Check this page out:
   
   http://en.wikipedia.org/wiki/Rad_(unit)

    

   MaGG, Mar 2, 2010
4. Mar 2, 2010 #3

   akinokoe

   

   Thank you very much. I am wondering what (Si) means. I am thinking it is system international but the S is in capital letter and i is in small letter.

    

   akinokoe, Mar 2, 2010
5. Mar 2, 2010 #4

   Bob S

   

   One rad is 100 ergs per gram deposited, in this case in a silicon solid state PIN diode detector (Si), which measures the number of electron-hole pairs. The conversion constant is about 3.7 eV of energy deposited per electron hole pair. This conversion constant may vary depending on the ionization density dE/dx (Bethe Bloch). See abstract
   
   http://www.iop.org/EJ/abstract/0031-9155/14/1/004 .
   
   Remember 1.6 x 10^-12 ergs = 1 eV.
   
   Bob S

    

   Bob S, Mar 2, 2010
6. Mar 2, 2010 #5

   akinokoe

   

   It makes perfect sense. I appreciate your help Bob.

    

   akinokoe, Mar 2, 2010

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