Abstract
We re-determined zeta values for zircon and apatite fission track dating, using diallyl phthalate (DAP) detectors and the modified observation system with newly installed HAMAMATSU PHOTONICSTM digital CCD camera and TOUCH PANEL SYSTEMSTM monitor. To minimize the human exposure to radioactivity after the sample irradiation, S-DAP detector was tested for apatite analyses and compared to the Q-DAP detector. The resulting zeta values are: 385 ± 4 (ED1) and 352 ± 4 (ED2) for zircon combined with Q-DAP detectors, and 300 ± 4 (ED1) and 321 ± 4 (ED1) for apatite with S-DAP and Q-DAP detectors, respectively. Data of the Durango Apatite were excluded from zeta value calculation due to contribution of fast-neutron-induced tracks of Th in the sample.
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