41AR 40AR(N,G) E=THERMAL: {~EGAF} 41AR c Evaluated Gamma-ray Activation File (EGAF). 41AR2c Evaluated by R.B. Firestone (LBNL), December 2003. 41AR c BR$|s{-0}=0.66 1 (1981MuZQ) 41AR c BR$|s{-0}=0.66 b. 41AR cG RI$Elemental |s(|g) assuming %Abundance=99.6003 30 41AR N 1.004 3 41AR PN C 41AR2PN Thermal cross section in barns. 41AR cN NR$Isotopic |s(|g)=NR*RI. 41AR2cN Divide by |s{-0} for intensity per neutron capture. 41AR L 0.0 7/2- 109.34 M 12 41AR L 167.28 175/2- 420 PS 30 41AR G 167.3 2 0.53 5 41AR L 516.1 23/2- 330 PS 20 41AR G 348.7 3 0.044 9 41AR G 516.0 3 0.16717 41AR L 1034.7 53/2+ 5 PS 3 41AR G 518.7 0.006 2 S 41AR G 867.3 6 0.007 2 41AR L 1353.93 223/2- 400 PS 50 41AR G 837.7 3 0.063 7 41AR G 1186.8 3 0.34 3 41AR G 1354.0 4 0.015 4 41AR L 1869 1/2+ 41AR G 515 0.0002 1 S 41AR G 834 0.00007 3 S 41AR G 1353 0.00013 6 S 41AR L 2398.2 41/2- 120 FS 35 41AR G 1044.3 4 0.040 8 41AR G 1881.510 0.009 3 41AR G 2229.520 0.0019 5 41AR L 2693.9 ? 41AR L 2733.4 73/2- 30 FS LT 41AR G 1379.4 0.0017 4 S 41AR G 2566.1 8 0.018 4 41AR L 2948.8 63/2- 65 FS LT 41AR G 2432.5 8 0.005514 41AR G 2781.815 0.011 3 41AR L 3009.7 7(1/2,3/2)- 110 FS LT 41AR G 2842.610 0.005814 41AR L 3278.8 22 ? 41AR G 3111.422 0.0026 7 41AR L 3326.9 51/2- 17 FS LT 41AR G 1457.7 0.0004 2 S 41AR G 1972.712 0.0036 7 41AR G 2291.720 0.0013 4 41AR G 2810.6 8 0.039 8 41AR L 3430.9 ? 41AR L 3732.1 25 ? 41AR G 3564.725 0.0009 3 41AR L 3968.3 51/2- 21 FS 12 41AR G 2614.4 8 0.019 4 41AR G 3452.010 0.013 3 41AR L 4270.3 10 3/2- 41AR G 4102.715 0.0020 5 41AR L 6099.1 4 1/2+ 41AR G 1828.812 0.007 2 41AR G 2130.8 8 0.029 5 41AR G 2668.220 0.0034 8 41AR G 2771.9 8 0.057 9 41AR G 3089.510 0.007 2 41AR G 3150.310 0.026 5 41AR G 3365.610 0.028 6 41AR G 3405.525 0.0005 2 41AR G 3700.6 8 0.065 7 41AR G 4745.3 8 0.36 4 41AR G 5064.010 0.0017 5 41AR G 5582.4 8 0.077 8 41AR 40AR(N,G) E=THERMAL: ^L^A^N^L 1967LY05,1970HA56,1990EN08 41AR c For the capture of thermal neutrons by Ar-40 (which 41ARAc captures about 97.0% of the thermal neutrons captured by natural 41ARBc argon), I adopted the average of the intensities reported by Hardell 41ARCc and Beer (1970) [1970Ha56] and by Lycklama et al. (1967) [1967Ly05]. 41ARDc For the gamma-ray energies, I adopted those based on the level 41AREc energies of Endt (1990) [1990En08]. For the five gamma rays not 41ARFc assigned levels (2668, 3111, 3405, 3565, and 3659 keV), I adopted the 41ARGc energies measured by Hardell et al. (1970). (These gamma rays were not 41ARHc observed by Lycklama et al., 1967). 41AR c The energies are probably good to a keV or better as the 41ARAc level energies are reported to be good to ~0.5 keV or better. The 41ARBc quoted uncertainties for the intensities are ~15% or more. As the two 41ARCc sets of intensities are generally consistent and as the total energy, 41ARDc the sum from the capture state, and the sum into the ground state are 41AREc close to 100%, I suspect that the intensities are good to ~10%. The 41ARFc sums of gamma rays into and from the various levels are also 41ARGc consistent to better than ~10%. 41AR N 1.0 41AR PN C 41AR2PN Per 100 neutron captures. 41AR G 2668.20 0.510 41AR G 3111.40 0.400 41AR G 3405.50 0.080 41AR G 3564.70 0.130 41AR G 3658.70 0.250 41AR L 0.0 7/2- 41AR L 167.30 5/2- 41AR G 167.30 76.050 41AR L 516.00 3/2- 41AR G 348.70 7.900 41AR G 516.00 27.650 41AR L 1034.70 3/2+ 41AR G 867.39 1.100 41AR L 1354.00 3/2- 41AR G 837.99 10.850 41AR G 1186.68 54.600 41AR G 1353.98 2.250 41AR L 1635.00 3/2- 41AR L 1869.00 1/2+ 41AR L 2398.30 1/2- 41AR G 1044.29 5.900 41AR G 1882.25 2.250 41AR G 2230.93 0.030 41AR L 2733.40 3/2- 41AR G 2566.01 3.450 41AR L 2948.50 3/2- 41AR G 2432.42 1.570 41AR G 2781.10 2.050 41AR L 3009.70 3/2- 41AR G 2842.29 0.940 41AR L 3326.70 1/2- 41AR G 1972.65 0.540 41AR G 2291.93 0.200 41AR G 2810.60 5.750 41AR L 3968.20 1/2- 41AR G 2614.11 3.150 41AR G 3452.04 1.750 41AR L 4270.10 3/2- 41AR G 4102.58 0.300 41AR L 6098.70 41AR G 1828.56 1.000 41AR G 2130.44 3.850 41AR G 2771.90 8.350 41AR G 3088.88 0.950 41AR G 3150.07 4.250 41AR G 3365.15 3.900 41AR G 3700.22 9.300 41AR G 4744.41 55.450 41AR G 5063.67 0.530 41AR G 5582.29 12.900