| 摘要 |
The present invention relates to a polymer composition equivalent to biological tissues and having a very high resistivity. The invention also relates to the utilization of such composition in the fabrication of the cathode (3") of a proportional counter equivalent to biological tissues, as well as to a counter comprising such cathode. Said composition is characterized in that it is obtained from a polyamide, polypropylene, epolene and carbon black and in that its atomic mass composition is such that hydrogen is comprised between 6 and 14 % approximately, carbon is between about 55.5 et 86.5 %, nitrogen is about between 2.5 and 4.5 %, oxygen is about between 1.5 and 7.5 %, calcium is about 1.5 and 9.5 % and fluorine is about 1.9 %, the sum of the amount of carbon, oxygen and fluorine in the total composition being comprised between 72 and 90 % approximately.
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