temperature dependent positron decay plus electron capture (b_ec) decay rates in units of inverse seconds both the ground and isomeric state are assumed to be in thermal equilibrium the rate is given in Clayton (1968) rate = (jg*rg+ji*ri*exp(-11.605*ei/t9)) 1 /(jg+ji*exp(-11.605*ei/t9))) where jg = 2J_0+1 for the ground state rg = decay rate for the ground state ji = 2J_i+1 for the isomeric state ri = decay rate for the isomeric state ei = energy (in MeV) of the isomeric state above the ground state t9 = temperature in units of 1.e+9 kelvins For positron decay plus electron capture, we list for each (Z,A) the decay rate INTO the isotope. The isotope listed is the DAUGHTER of the positron decay. example: the value 2.58E-03 (line 2, column 3) gives the decay rate for al26 -> mg26 at temperature t9 = 2.0 temperature (t9=1.e+9 K) Z A 2.0 2.5 3.0 4.0 5.0 7.0 10.0 mg 24 3.54E-01 3.65E-01 3.75E-01 3.92E-01 4.05E-01 4.24E-01 4.41E-01 mg 26 2.58E-03 3.34E-03 3.96E-03 4.89E-03 5.55E-03 6.40E-03 7.12E-03 s 34 1.14E-01 9.99E-02 9.14E-02 8.15E-02 7.60E-02 7.01E-02 6.59E-02 ar 38 4.87E-02 5.58E-02 6.11E-02 6.83E-02 7.31E-02 7.88E-02 8.34E-02 ca 42 7.20E-01 5.53E-01 4.34E-01 2.98E-01 2.31E-01 1.69E-01 1.32E-01 ca 44 3.15E-05 2.79E-05 2.54E-05 2.22E-05 2.03E-05 1.83E-05 1.68E-05 cr 50 6.30E-01 5.15E-01 4.47E-01 3.73E-01 3.33E-01 2.93E-01 2.65E-01 cr 52 2.35E-05 3.49E-05 4.54E-05 6.26E-05 7.55E-05 9.29E-05 1.08E-04 fe 54 6.33E-01 5.22E-01 4.58E-01 3.88E-01 3.50E-01 3.11E-01 2.85E-01 as 73 4.04E-05 4.07E-05 4.09E-05 4.12E-05 4.13E-05 4.15E-05 4.16E-05 se 74 2.73E-04 2.73E-04 2.73E-04 2.72E-04 2.72E-04 2.72E-04 2.72E-04 kr 78 1.62E-03 1.64E-03 1.65E-03 1.66E-03 1.67E-03 1.68E-03 1.68E-03 kr 81 2.22E-05 2.14E-05 2.09E-05 2.03E-05 1.99E-05 1.95E-05 1.92E-05 kr 82 2.65E-03 2.50E-03 2.40E-03 2.29E-03 2.22E-03 2.15E-03 2.09E-03 rb 85 1.21E-06 1.53E-06 1.80E-06 2.19E-06 2.47E-06 2.82E-06 3.12E-06 sr 83 1.81E-03 1.82E-03 1.82E-03 1.83E-03 1.84E-03 1.84E-03 1.85E-03 sr 85 4.55E-05 4.54E-05 4.53E-05 4.53E-05 4.52E-05 4.51E-05 4.51E-05 sr 87 1.64E-06 1.41E-06 1.24E-06 1.05E-06 9.39E-07 8.24E-07 7.45E-07 y 85 1.63E-03 1.69E-03 1.74E-03 1.82E-03 1.88E-03 1.95E-03 2.02E-03 y 89 3.57E-06 4.65E-06 5.89E-06 8.44E-06 1.07E-05 1.44E-05 1.81E-05 zr 89 1.06E-04 1.06E-04 1.07E-04 1.07E-04 1.07E-04 1.08E-04 1.08E-04 zr 91 4.70E-10 5.20E-10 5.56E-10 6.05E-10 6.36E-10 6.73E-10 7.02E-10 zr 92 1.04E-07 1.20E-07 1.30E-07 1.45E-07 1.55E-07 1.66E-07 1.75E-07 nb 91 7.67E-04 7.90E-04 8.19E-04 8.81E-04 9.40E-04 1.04E-03 1.14E-03 mo 89 5.40E-02 5.40E-02 5.40E-02 5.40E-02 5.40E-02 5.40E-02 5.40E-02 mo 90 7.04E-02 6.48E-02 5.98E-02 5.26E-02 4.79E-02 4.25E-02 3.86E-02 mo 91 3.66E-03 3.66E-03 3.66E-03 3.66E-03 3.66E-03 3.65E-03 3.65E-03 mo 93 6.99E-05 6.98E-05 6.97E-05 6.95E-05 6.94E-05 6.93E-05 6.91E-05 mo 94 7.19E-05 7.42E-05 7.59E-05 7.81E-05 7.94E-05 8.10E-05 8.22E-05 mo 95 8.32E-06 8.27E-06 8.23E-06 8.19E-06 8.16E-06 8.13E-06 8.10E-06 mo 96 2.74E-06 2.76E-06 2.77E-06 2.79E-06 2.81E-06 2.82E-06 2.83E-06 mo 97 3.54E-10 3.91E-10 4.18E-10 4.54E-10 4.76E-10 5.03E-10 5.24E-10 tc 93 1.17E-02 1.19E-02 1.21E-02 1.25E-02 1.30E-02 1.38E-02 1.46E-02 ru 95 2.29E-03 2.28E-03 2.26E-03 2.24E-03 2.22E-03 2.18E-03 2.15E-03 ru 96 1.71E-03 1.73E-03 1.75E-03 1.77E-03 1.78E-03 1.79E-03 1.80E-03 ru 97 3.70E-04 3.68E-04 3.67E-04 3.64E-04 3.62E-04 3.60E-04 3.58E-04 ru 99 3.18E-05 3.23E-05 3.27E-05 3.31E-05 3.33E-05 3.36E-05 3.37E-05 ru 101 1.15E-06 1.21E-06 1.26E-06 1.31E-06 1.33E-06 1.36E-06 1.38E-06 ru 102 1.53E-08 1.45E-08 1.40E-08 1.34E-08 1.31E-08 1.27E-08 1.24E-08 pd 102 8.56E-04 8.56E-04 8.56E-04 8.56E-04 8.55E-04 8.55E-04 8.55E-04 pd 104 2.21E-04 2.21E-04 2.21E-04 2.22E-04 2.22E-04 2.22E-04 2.22E-04 pd 106 1.35E-04 1.25E-04 1.19E-04 1.11E-04 1.07E-04 1.02E-04 9.86E-05 pd 108 4.21E-05 3.85E-05 3.62E-05 3.34E-05 3.19E-05 3.01E-05 2.88E-05 cd 104 6.99E-03 7.04E-03 7.08E-03 7.12E-03 7.15E-03 7.18E-03 7.20E-03 cd 105 2.28E-03 2.29E-03 2.30E-03 2.32E-03 2.33E-03 2.36E-03 2.39E-03 cd 106 1.96E-03 1.97E-03 1.97E-03 1.97E-03 1.97E-03 1.97E-03 1.97E-03 cd 108 2.19E-04 2.20E-04 2.20E-04 2.21E-04 2.21E-04 2.21E-04 2.22E-04 cd 110 6.34E-05 6.49E-05 6.59E-05 6.71E-05 6.79E-05 6.89E-05 6.96E-05 cd 114 2.18E-05 1.92E-05 1.75E-05 1.55E-05 1.44E-05 1.31E-05 1.22E-05 in 113 3.45E-05 3.54E-05 3.59E-05 3.66E-05 3.70E-05 3.74E-05 3.77E-05 sn 116 6.19E-04 5.74E-04 5.39E-04 4.91E-04 4.62E-04 4.28E-04 4.03E-04 sn 118 1.40E-03 1.18E-03 1.04E-03 8.85E-04 7.98E-04 7.07E-04 6.44E-04 sn 120 2.17E-04 1.92E-04 1.76E-04 1.57E-04 1.47E-04 1.35E-04 1.27E-04 sb 115 1.94E-03 1.94E-03 1.94E-03 1.94E-03 1.94E-03 1.94E-03 1.94E-03 sb 119 6.15E-06 5.40E-06 4.94E-06 4.41E-06 4.12E-06 3.81E-06 3.60E-06 sb 121 2.03E-07 1.69E-07 1.47E-07 1.22E-07 1.08E-07 9.40E-08 8.43E-08 te 114 2.17E-01 2.01E-01 1.90E-01 1.78E-01 1.71E-01 1.64E-01 1.59E-01 te 118 1.16E-03 1.18E-03 1.19E-03 1.20E-03 1.21E-03 1.21E-03 1.22E-03 te 120 1.67E-04 1.73E-04 1.78E-04 1.83E-04 1.87E-04 1.91E-04 1.93E-04 xe 117 8.60E-02 8.65E-02 8.69E-02 8.75E-02 8.78E-02 8.83E-02 8.86E-02 xe 121 4.62E-03 4.63E-03 4.63E-03 4.64E-03 4.64E-03 4.64E-03 4.64E-03 xe 122 9.55E-03 9.12E-03 8.84E-03 8.51E-03 8.32E-03 8.11E-03 7.95E-03 cs 129 8.86E-05 8.86E-05 8.86E-05 8.86E-05 8.86E-05 8.86E-05 8.86E-05 ba 127 2.68E-03 2.68E-03 2.68E-03 2.68E-03 2.69E-03 2.69E-03 2.69E-03 ba 132 7.46E-05 7.86E-05 8.13E-05 8.46E-05 8.65E-05 8.86E-05 9.02E-05 la 133 5.52E-05 5.46E-05 5.43E-05 5.38E-05 5.36E-05 5.33E-05 5.31E-05 ce 131 5.71E-03 5.59E-03 5.50E-03 5.40E-03 5.34E-03 5.28E-03 5.23E-03 ce 138 5.00E-03 4.19E-03 3.63E-03 2.97E-03 2.59E-03 2.20E-03 1.93E-03 pr 133 9.90E-03 9.90E-03 9.90E-03 9.90E-03 9.90E-03 9.90E-03 9.90E-03 pr 135 1.07E-03 1.08E-03 1.09E-03 1.10E-03 1.10E-03 1.11E-03 1.11E-03 pr 139 2.31E-04 2.08E-04 1.92E-04 1.72E-04 1.61E-04 1.48E-04 1.40E-04 pm 139 4.37E-03 4.32E-03 4.29E-03 4.24E-03 4.22E-03 4.19E-03 4.17E-03 pm 141 7.07E-04 6.80E-04 6.64E-04 6.45E-04 6.34E-04 6.23E-04 6.15E-04 sm 140 2.35E-01 2.14E-01 2.00E-01 1.84E-01 1.75E-01 1.65E-01 1.57E-01 sm 141 2.57E-02 2.62E-02 2.65E-02 2.69E-02 2.71E-02 2.73E-02 2.75E-02 sm 150 7.27E-07 7.47E-07 7.60E-07 7.77E-07 7.87E-07 7.99E-07 8.07E-07 sm 152 5.73E-07 6.01E-07 6.20E-07 6.45E-07 6.60E-07 6.78E-07 6.92E-07 eu 141 3.98E-02 3.71E-02 3.54E-02 3.33E-02 3.21E-02 3.10E-02 3.02E-02 eu 143 9.53E-03 9.12E-03 8.87E-03 8.58E-03 8.41E-03 8.24E-03 8.11E-03 eu 145 5.00E-04 4.96E-04 4.93E-04 4.87E-04 4.83E-04 4.79E-04 4.75E-04 gd 144 5.00E-01 4.34E-01 3.85E-01 3.25E-01 2.90E-01 2.52E-01 2.26E-01 gd 147 5.18E-03 5.23E-03 5.27E-03 5.31E-03 5.33E-03 5.36E-03 5.38E-03 gd 148 3.70E-03 3.81E-03 3.88E-03 3.96E-03 4.01E-03 4.07E-03 4.11E-03 gd 149 2.31E-03 2.33E-03 2.34E-03 2.35E-03 2.36E-03 2.37E-03 2.37E-03 gd 150 4.34E-04 6.29E-04 7.87E-04 1.00E-03 1.14E-03 1.28E-03 1.39E-03 gd 151 1.33E-03 1.36E-03 1.38E-03 1.41E-03 1.42E-03 1.44E-03 1.45E-03 gd 152 1.00E-04 1.53E-04 1.99E-04 2.64E-04 3.06E-04 3.52E-04 3.86E-04 gd 158 4.54E-07 5.11E-07 5.53E-07 6.09E-07 6.45E-07 6.89E-07 7.23E-07 tb 147 1.67E-02 1.59E-02 1.50E-02 1.36E-02 1.26E-02 1.15E-02 1.07E-02 dy 149 3.06E-02 3.05E-02 3.04E-02 3.03E-02 3.02E-02 3.01E-02 3.01E-02 dy 150 1.03E-02 1.13E-02 1.26E-02 1.51E-02 1.71E-02 1.97E-02 2.17E-02 dy 151 1.39E-02 1.39E-02 1.38E-02 1.38E-02 1.37E-02 1.37E-02 1.37E-02 dy 152 8.93E-03 9.30E-03 9.54E-03 9.83E-03 9.99E-03 1.02E-02 1.03E-02 dy 153 5.29E-03 5.26E-03 5.24E-03 5.21E-03 5.19E-03 5.16E-03 5.15E-03 dy 158 8.00E-04 7.87E-04 7.77E-04 7.65E-04 7.58E-04 7.49E-04 7.43E-04 dy 160 3.45E-04 3.39E-04 3.35E-04 3.30E-04 3.27E-04 3.24E-04 3.21E-04 dy 162 2.76E-04 2.59E-04 2.47E-04 2.34E-04 2.26E-04 2.18E-04 2.11E-04 ho 149 1.66E-01 1.58E-01 1.48E-01 1.33E-01 1.23E-01 1.11E-01 1.03E-01 er 153 3.99E-02 3.98E-02 3.97E-02 3.96E-02 3.95E-02 3.95E-02 3.94E-02 er 155 2.95E-02 2.94E-02 2.93E-02 2.92E-02 2.92E-02 2.91E-02 2.91E-02 er 160 1.35E-03 1.35E-03 1.35E-03 1.35E-03 1.36E-03 1.36E-03 1.36E-03 yb 166 4.48E-03 4.48E-03 4.49E-03 4.49E-03 4.49E-03 4.49E-03 4.49E-03 yb 168 2.04E-03 2.03E-03 2.01E-03 2.00E-03 1.99E-03 1.97E-03 1.96E-03 hf 180 3.82E-06 3.56E-06 3.39E-06 3.19E-06 3.08E-06 2.95E-06 2.86E-06 w 162 7.57E-01 7.66E-01 7.71E-01 7.76E-01 7.79E-01 7.83E-01 7.85E-01 w 163 1.13E+00 1.13E+00 1.12E+00 1.12E+00 1.12E+00 1.12E+00 1.12E+00 w 165 5.00E-01 4.94E-01 4.90E-01 4.86E-01 4.83E-01 4.80E-01 4.77E-01 w 184 4.14E-08 3.63E-08 3.33E-08 3.01E-08 2.83E-08 2.65E-08 2.53E-08 re 181 3.24E-03 3.28E-03 3.31E-03 3.35E-03 3.37E-03 3.39E-03 3.41E-03 re 183 1.49E-05 1.50E-05 1.50E-05 1.50E-05 1.50E-05 1.50E-05 1.51E-05 os 167 1.57E+01 1.51E+01 1.46E+01 1.40E+01 1.37E+01 1.32E+01 1.29E+01 os 172 2.09E-01 2.14E-01 2.17E-01 2.21E-01 2.23E-01 2.25E-01 2.27E-01 os 174 1.08E-01 1.11E-01 1.13E-01 1.15E-01 1.17E-01 1.18E-01 1.19E-01 os 190 1.33E-05 1.80E-05 2.17E-05 2.67E-05 2.98E-05 3.32E-05 3.58E-05 ir 183 1.28E-02 1.29E-02 1.29E-02 1.30E-02 1.31E-02 1.31E-02 1.32E-02 ir 185 1.81E-04 1.83E-04 1.84E-04 1.86E-04 1.87E-04 1.89E-04 1.90E-04 pt 184 2.70E-02 2.67E-02 2.64E-02 2.62E-02 2.60E-02 2.58E-02 2.56E-02 pt 189 1.65E-03 1.79E-03 1.88E-03 1.98E-03 2.03E-03 2.09E-03 2.13E-03 au 185 1.45E-02 1.45E-02 1.45E-02 1.45E-02 1.45E-02 1.45E-02 1.46E-02 au 193 2.91E-05 2.77E-05 2.69E-05 2.58E-05 2.52E-05 2.46E-05 2.41E-05 au 195 7.04E-06 6.36E-06 5.93E-06 5.45E-06 5.19E-06 4.90E-06 4.70E-06 au 197 1.73E-06 1.53E-06 1.42E-06 1.28E-06 1.21E-06 1.13E-06 1.08E-06 hg 189 6.62E-03 6.88E-03 7.05E-03 7.25E-03 7.36E-03 7.47E-03 7.55E-03 hg 192 1.13E-03 1.12E-03 1.12E-03 1.12E-03 1.11E-03 1.11E-03 1.11E-03 hg 193 8.48E-04 9.34E-04 9.93E-04 1.06E-03 1.10E-03 1.15E-03 1.17E-03 hg 196 1.11E-04 1.13E-04 1.15E-04 1.17E-04 1.19E-04 1.20E-04 1.22E-04 hg 198 3.85E-05 4.01E-05 4.15E-05 4.37E-05 4.52E-05 4.69E-05 4.82E-05 tl 191 6.62E-03 6.49E-03 6.41E-03 6.31E-03 6.26E-03 6.19E-03 6.15E-03 tl 195 7.70E-04 7.70E-04 7.70E-04 7.70E-04 7.70E-04 7.70E-04 7.70E-04 tl 197 1.01E-03 9.01E-04 8.25E-04 7.32E-04 6.77E-04 6.18E-04 5.77E-04 tl 199 1.14E-04 1.08E-04 1.03E-04 9.70E-05 9.32E-05 8.90E-05 8.61E-05 tl 201 2.60E-05 3.10E-05 3.64E-05 4.61E-05 5.33E-05 6.26E-05 6.99E-05 pb 191 7.56E-02 9.17E-02 1.05E-01 1.25E-01 1.39E-01 1.56E-01 1.71E-01 pb 193 1.04E-02 1.05E-02 1.07E-02 1.09E-02 1.10E-02 1.12E-02 1.14E-02 pb 195 3.82E-03 3.83E-03 3.85E-03 3.88E-03 3.90E-03 3.93E-03 3.96E-03 pb 196 2.21E-03 2.20E-03 2.20E-03 2.19E-03 2.18E-03 2.18E-03 2.18E-03 pb 197 1.24E-03 1.23E-03 1.23E-03 1.23E-03 1.23E-03 1.22E-03 1.22E-03 pb 199 4.28E-04 4.28E-04 4.28E-04 4.29E-04 4.29E-04 4.30E-04 4.30E-04 pb 201 1.07E-04 1.07E-04 1.08E-04 1.08E-04 1.09E-04 1.10E-04 1.12E-04