Element

Decay

Energy/MeV

Absorption coefficient of plastic scintillator

The semi-absorptive thickness of a plastic scintillator/cm

Sr-90

β

0.196

192.186

0.004

Sr-90

β

2.288

7.317

0.095

Cs-137

β

1.576

12.014

0.058

Cs-137

β

0.512

53.643

0.013

Cs-137

β

0.174

225.160

0.003

Cs-137

β

0.300

109.107

0.006

Cs-137

β

0.416

70.636

0.010

I-129

β

0.409

72.249

0.010

I-129

β

1.176

17.733

0.039

K-40

β

1.350

14.760

0.047

K-40

β

0.560

47.570

0.015