e_low e_hi error factor eff purity 0.0 0.8 1.661 0.426 0.852 0.8 1.0 1.435 0.593 0.819 1.0 2.0 1.472 0.600 0.769 2.0 3.0 1.438 0.672 0.719 3.0 4.0 1.325 0.737 0.773 4.0 5.0 1.324 0.718 0.794 5.0 7.0 1.351 0.757 0.724 7.0 10.0 1.419 0.740 0.671 10.0 15.0 1.450 0.722 0.658 15.0 900.0 1.269 0.896 0.694 total error factor efficiency purity 1.419 0.657 0.756