Alpha Tracks

Source Exposure Etch Mag Thumbnail
1 microCu

Am-241

1 cm away

 330 seconds

10,000 alphas/mm^2

 6 hrs in 6M NaOH at 70C 40x 330secs_40x.gif (1346706 bytes)
400x a2-1.jpg (75683 bytes)
1 microCu

Am-241

3 cm away

(LOW ENERGY)

 305 seconds 6 hrs in 6.5M NaOH at 68C 400x 2.jpg (106068 bytes)
4.jpg (108239 bytes)
1 microCu

Am-241

in contact

  7 minutes 3 hrs in 6.5M NaOH at 68C 100x 3hr100x.jpg (274350 bytes)
200x 3hr200x.jpg (213455 bytes)
400x 3hr400x1.jpg (185400 bytes)
400x 3hr400x2.jpg (198924 bytes)
400x

(edge of damage)

 3hr400x3.jpg (148966 bytes)
Tyuyamunite

(uranium ore)

 1 hr 15 min 2 hrs in 6.5M NaOH at 68C 400x TY400x.jpg (99164 bytes)
6 hrs in 6.5M NaOH at 68C 400x

(marks are ~ 1 micron)

 TY6hr400x.jpg (111036 bytes)
Thorium

(lantern mantel)

 1 hr 15 min 6 hrs in 6.5M NaOH at 68C 400x Th6hr400x.jpg (93351 bytes)