The samples for the present study_ The efficiency is the slope of the tangent at the point where signal intensity is zero on the saturating exponential curve of the dose response_ The k -values are obtained as the ratio of the efficiencies to He ion implantation and to the gamma ray irradiation_
| Sample No. | Site | Sampling Location | Depth (m) | Cruise No. | ESR age (year) | Efficiency to He | Efficiency to | k-value | |
|---|---|---|---|---|---|---|---|---|---|
| Latitude (N) | Longitude (E) | ||||||||
| HPD#1621R07 | Hatoma Knoll | 24°51.33’ | 123°50.33’ | 1499 | KY14-02 | 0.020 ± 0.001 | 0.37 ± 0.04 | 0.053 ± 0.006 | |
| HPD#1358R03 | Iheya North Knoll | 27°47.46’ | 126°53.73’ | 982 | NT12-06 | 0.011 ± 0.001 | 0.11 ± 0.02 | 0.102 ± 0.022 | |
| Synthetic | 0.022 ± 0.001 | 1.28 ± 0.07 | 0.017 ± 0.001 | ||||||