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Atomic: M.A.C. | Reference
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| Mass Attenuation Data for Helium | |||
| Energy (MeV) | μ/ρ (cm2/g) | μen/ρ (cm2/g) | |
| 1.00000E-03 | 6.084E+01 | 6.045E+01 | |
| 1.50000E-03 | 1.676E+01 | 1.638E+01 | |
| 2.00000E-03 | 6.863E+00 | 6.503E+00 | |
| 3.00000E-03 | 2.007E+00 | 1.681E+00 | |
| 4.00000E-03 | 9.329E-01 | 6.379E-01 | |
| 5.00000E-03 | 5.766E-01 | 3.061E-01 | |
| 6.00000E-03 | 4.195E-01 | 1.671E-01 | |
| 8.00000E-03 | 2.933E-01 | 6.446E-02 | |
| 1.00000E-02 | 2.476E-01 | 3.260E-02 | |
| 1.50000E-02 | 2.092E-01 | 1.246E-02 | |
| 2.00000E-02 | 1.960E-01 | 9.410E-03 | |
| 3.00000E-02 | 1.838E-01 | 1.003E-02 | |
| 4.00000E-02 | 1.763E-01 | 1.190E-02 | |
| 5.00000E-02 | 1.703E-01 | 1.375E-02 | |
| 6.00000E-02 | 1.651E-01 | 1.544E-02 | |
| 8.00000E-02 | 1.562E-01 | 1.826E-02 | |
| 1.00000E-01 | 1.486E-01 | 2.047E-02 | |
| 1.50000E-01 | 1.336E-01 | 2.424E-02 | |
| 2.00000E-01 | 1.224E-01 | 2.647E-02 | |
| 3.00000E-01 | 1.064E-01 | 2.868E-02 | |
| 4.00000E-01 | 9.535E-02 | 2.951E-02 | |
| 5.00000E-01 | 8.707E-02 | 2.971E-02 | |
| 6.00000E-01 | 8.054E-02 | 2.959E-02 | |
| 8.00000E-01 | 7.076E-02 | 2.890E-02 | |
| 1.00000E+00 | 6.362E-02 | 2.797E-02 | |
| 1.25000E+00 | 5.688E-02 | 2.674E-02 | |
| 1.50000E+00 | 5.173E-02 | 2.555E-02 | |
| 2.00000E+00 | 4.422E-02 | 2.343E-02 | |
| 3.00000E+00 | 3.503E-02 | 2.019E-02 | |
| 4.00000E+00 | 2.949E-02 | 1.790E-02 | |
| 5.00000E+00 | 2.577E-02 | 1.622E-02 | |
| 6.00000E+00 | 2.307E-02 | 1.493E-02 | |
| 8.00000E+00 | 1.940E-02 | 1.308E-02 | |
| 1.00000E+01 | 1.703E-02 | 1.183E-02 | |
| 1.50000E+01 | 1.363E-02 | 9.948E-03 | |
| 2.00000E+01 | 1.183E-02 | 8.914E-03 | |