Input interpretation
Cf-254 (californium-254) | Rn-198 (radon-198)
Decay properties
| Cf-254 | Rn-198 half-life | 60.5 days (60.2 to 60.81 days) | 65 ms (61 to 69.1 ms) mean lifetime | 87.3 days (86.92 to 87.66 days) | 94 ms (88.6 to 98.9 ms) decay constant | 1.33×10^-7 per second | 11 per second specific activity | 314 TBq/g | 3.2×10^10 TBq/g width | 8.73×10^-23 eV | 7×10^-15 eV decay modes | SF (spontaneous fission) | α (alpha emission) | 2β^- (double beta decay) | α (alpha emission) | β^+ (positron emission) final decay products | Pb-206 (0.08%) | Tl-205 (2×10^-9%) | Pb-208 (2×10^-12%) | W-184 (7×10^-15%) | Yb-168 (4×10^-30%) | Er-164 (3×10^-30%) | Dy-160 (1×10^-31%) | Dy-156 (9×10^-34%) | Sm-144 (9×10^-35%) | Ce-140 (9×10^-36%) | Dy-164 (0%) | Er-168 (0%) | Gd-156 (0%) | Hf-176 (0%) | Hf-180 (0%) | Sm-152 (0%) | Yb-172 (0%) | W-182 (100%) | Pt-194 (0.9%) | Hf-178 (2×10^-8%) | Hg-198 (0%) | Os-190 (0%)
Decay modes
Cf-254
decay mode | SF (spontaneous fission) branching ratio | 100% decay mode | α (alpha emission) branching ratio | 0.31% Q-value | 5.92681 MeV (megaelectronvolts) daughter nuclide | Cm-250 decay mode | 2β^- (double beta decay) Q-value | 436.6 keV (kiloelectronvolts) daughter nuclide | Fm-254
Rn-198
decay mode | α (alpha emission) branching ratio | 99% Q-value | 7.3493 MeV (megaelectronvolts) daughter nuclide | Po-194 decay mode | β^+ (positron emission) branching ratio | 1% Q-value | 4.4191 MeV (megaelectronvolts) daughter nuclide | At-198
Radiation shielding
Radiation shielding
Decay chain
Cf-254
Decay chain Cf-254
Rn-198
Decay chain Rn-198
Mass properties
| Cf-254 | Rn-198 atomic number (Z) | 98 | 86 mass number (A) | 254 | 198 neutron number | 156 | 112 atomic mass | 254.087322909 u (unified atomic mass units) | 197.998678663 u (unified atomic mass units) mass excess | 81.340767 MeV (megaelectronvolts) | -1.230817 MeV (megaelectronvolts) binding energy per nucleon | 7.449228 MeV (megaelectronvolts) | 7.737726 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes