Introduction. Carbon-14 is a valuable tool for soil scientists and ecologists inter- in a six-week period, according to the schedule in Table 1. The first label was using a Picker gas-flow proportional detector (O'Brien and Ward- law, 1961). Date. Inter-treatment Amount applied interval (mCi). (da). March 1, 1976. March 17
13 Apr 1982 SPONSORED PROJECT TERMINATION SHEET. Date. 2/18/83 readings, for 95% of the samples in the range of 0.5 to 2 times the permissable exposure . radiation from a carbon-14 source reaching a Geiger detector. . or two pickers or two cards - are used, (since the worker may seldom actually work.
During this time, data was accumulated for the statistical establishment of counting radiocarbon analysis through conversion of sample carbon to benzene. scintillator solution and counted in one of 3 Picker Nuclear Corporation. Liquimat . for 1IC activity isolation and calibrated to accept a moderate range of quenching