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Dose unit Mrad(Si)

  1. Mar 1, 2010 #1
    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.
  2. jcsd
  3. Mar 2, 2010 #2
  4. Mar 2, 2010 #3
    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.
  5. Mar 2, 2010 #4
    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
  6. Mar 2, 2010 #5
    It makes perfect sense. I appreciate your help Bob.
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