Etching time (min) | Track density (no/mm2) | Time of exposure to alpha source | |
(10 sec) | (20 sec) | (30 sec) | |
30 | 614 | 1212 | 1672 |
60 | 658 | 1271 | 1874 |
90 | 689 | 1267 | 2067.9 |
120 | 757 | 1345 | 1975 |
150 | 640 | 1265 | 1814 |
180 | 672 | 1255 | 1790 |
210 | 662 | 1204 | 1778 |
240 | 638 | 1088 | 1721 |
Average | 666.2 | 1239.5 | 1836.48 |
Max | 757 | 1267 | 2067.9 |