Input interpretation
double beta plus decay | decay modes
Categorized list
2β^+ (double beta decay) | Ar-36, Ba-130, Ba-132, Cd-106, Cd-108, Ca-40, Ce-136, Ce-138, Cr-50, Fe-54, Kr-78, Hg-196, Mo-92, Ni-58, Pd-102, Ru-96, Sm-144, Se-74, Sr-84, Te-120, ... α (alpha emission) | 2β^+ (double beta decay) | Dy-154, Dy-156, Dy-158, Er-162, Er-164, Gd-148, Gd-150, Gd-152, Hf-174, Os-184, Pt-190, Ra-218, Rn-212, Rn-214, Th-224, W-180, Yb-168 SF (spontaneous fission) | α (alpha emission) | 2β^+ (double beta decay) | No-258 α (alpha emission) | SF (spontaneous fission) | 2β^+ (double beta decay) | Fm-252 α (alpha emission) | SF (spontaneous fission) | ^22Ne (cluster emission) | 2β^+ (double beta decay) | U-230 α (alpha emission) | SF (spontaneous fission) | ^28Mg (cluster emission) | 2β^+ (double beta decay) | Pu-236 α (alpha emission) | SF (spontaneous fission) | ^34Si (cluster emission) | 2β^+ (double beta decay) | Cm-242
Decay properties
half-life | median | 325 billion yr | highest | 3×10^21 yr (9.13×10^8 to ∞ s) (Ba-132 and Ca-40) | lowest | 270 ns (249.7 to 290.3 ns) (Rn-214) mean lifetime | median | 469 billion yr | highest | 4.3×10^21 yr (1.31×10^9 to ∞ s) (Ba-132 and Ca-40) | lowest | 390 ns (360.3 to 418.7 ns) (Rn-214) decay constant | highest | 2.56×10^6 per second (Rn-214) | lowest | 0 per second (22 isotopes) | median | 7.3×10^-30 per second specific activity | highest | 7.22×10^15 TBq/g (Rn-214) | lowest | 0 Bq/g (22 isotopes) | median | 7.2×10^-8 Bq/g width | median | 3.3×10^-45 eV | highest | 1.69×10^-9 eV (Rn-214) | lowest | 0 eV (22 isotopes)
Units
