What Is Mrad(Si)? Irradiation Damage To Semiconductor Devices

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Mrad(Si) refers to the radiation dose absorbed by silicon semiconductor devices, specifically indicating the energy deposited in the material. One rad corresponds to 100 ergs per gram, relevant in the context of measuring electron-hole pairs in silicon detectors. The notation (Si) signifies that the measurement is specific to silicon, not a reference to the International System of Units. The energy conversion for electron-hole pairs is approximately 3.7 eV, which can vary based on ionization density. Understanding these concepts is crucial for evaluating radiation damage in semiconductor applications.
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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.
 
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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.
 
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
 
It makes perfect sense. I appreciate your help Bob.
 
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