Radiation damage to tetramethlysilane and tetramethlygermanium ionization chambers

Two detector media suitable for a warm liquid ionization chamber filled with tetramethylsilane (TMS) and tetramethylgermanium (TMG) were exposed to /spl gamma/-radiation from a /sup 60/Co source up to a dose of 579 Gray and 902 Gray, respectively. The electron lifetimes and the free ion yields were measured as a function of accumulated radiation dose. A similar behavior of the electron lifetimes and the free ion yields with increasing radiation dose was observed between the TMS and TMG ionization chambers.<
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