25/05/2018, 15:04
Selected Radioactive Isotopes
Decay modes are α size 12{α} {}, β− size 12{β rSup { size 8{ - {}} } } {}, β+ size 12{β rSup { size 8{+{}} } } {}, electron capture (EC) and isomeric transition (IT). EC results in the same daughter nucleus as would ...
Decay modes are α size 12{α} {}, β− size 12{β rSup { size 8{ - {}} } } {}, β+ size 12{β rSup { size 8{+{}} } } {}, electron capture (EC) and isomeric transition (IT). EC results in the same daughter nucleus as would β+ size 12{β rSup { size 8{+{}} } } {} decay. IT is a transition from a metastable excited state. Energies for β± size 12{β rSup { size 8{ +- {}} } } {} decays are the maxima; average energies are roughly one-half the maxima.
| Isotope | t 1/2 | DecayMode(s) | Energy(MeV) | Percent | γ size 12{γ} {}-Ray Energy(MeV) | Percent | |
| 3 H size 12{rSup { size 8{ 3 {}} }H} {} | 12.33 y | β− size 12{β rSup { size 8{ - {}} } } {} | 0.0186 | 100% | |||
| 14 C size 12{rSup { size 8{ 6 {}} }Li} {} | 5730 y | β − size 12{β rSup { size 8{ - {}} } } {} | 0.156 | 100% | |||
| 13 N size 12{rSup { size 8{ 13 {}} }N} {} | 9.96 min | β + size 12{β rSup { size 8{+{}} } } {} | 1.20 | 100% | |||
| 22 Na size 12{rSup { size 8{ 6 {}} }Li} {} | 2.602 y | β + size 12{β rSup { size 8{+{}} } } {} | 0.55 | 90% | γ size 12{γ} {} | 1.27 | 100% |
| 32 P size 12{rSup { size 8{ 32 {}} }P} {} | 14.28 d | β − size 12{β rSup { size 8{ - {}} } } {} | 1.71 | 100% | |||
| 35 S size 12{rSup { size 8{ 35 {}} }S} {} | 87.4 d | β− size 12{β rSup { size 8{ - {}} } } {} | 0.167 | 100% | |||
| 36 Cl size 12{rSup { size 8{ 36 {}} }Cl} {} | 3 . 00 × 10 5 y size 12{3 "." "00" times "10" rSup { size 8{5} } y} {} | β − size 12{β rSup { size 8{ - {}} } } {} | 0.710 | 100% | |||
| 40 K size 12{rSup { size 8{ 40 {}} }K} {} | 1 . 28 × 10 9 y size 12{1 "." "28" times "10" rSup { size 8{9} } y} {} | β − size 12{β rSup { size 8{ - {}} } } {} | 1.31 | 89% | |||
| 43 K size 12{rSup { size 8{ 43 {}} }K} {} | 22.3 h | β − size 12{β rSup { size 8{ - {}} } } {} | 0.827 | 87% | γ s size 12{γs} {} | 0.373 | 87% |
| 0.618 | 87% | ||||||
| 45 Ca size 12{rSup { size 8{ 6 {}} }Li} {} | 165 d | β− size 12{β rSup { size 8{ - {}} } } {} | 0.257 | 100% | |||
| 51 Cr size 12{rSup { size 8{ 51 {}} }Cr} {} | 27.70 d | EC | γ size 12{γ} {} | 0.320 | 10% | ||
| 52 Mn size 12{rSup { size 8{ 52 {}} }Mn} {} | 5.59d | β + size 12{β rSup { size 8{+{}} } } {} | 3.69 | 28% | γ s size 12{γs} {} | 1.33 | 28% |
| 1.43 | 28% | ||||||
| 52 Fe size 12{rSup { size 8{ 52 {}} }Fe} {} | 8.27 h | β + size 12{β rSup { size 8{+{}} } } {} | 1.80 | 43% | 0.169 | 43% | |
| 0.378 | 43% | ||||||
| 59 Fe size 12{rSup { size 8{ 59 {}} }Fe} {} | 44.6 d | β − s size 12{β rSup { size 8{ - {}} } s} {} | 0.273 | 45% | γ s size 12{γs} {} | 1.10 | 57% |
| 0.466 | 55% | 1.29 | 43% | ||||
| 60 Co size 12{rSup { size 8{ 60 {}} }Co} {} | 5.271 y | β− size 12{β rSup { size 8{ - {}} } } {} | 0.318 | 100% | γ s size 12{γs} {} | 1.17 | 100% |
| 1.33 | 100% | ||||||
| 65 Zn size 12{rSup { size 8{ 65 {}} }Zn} {} | 244.1 d | EC | γ size 12{γ} {} | 1.12 | 51% | ||
| 67 Ga size 12{rSup { size 8{ 67 {}} }Ga} {} | 78.3 h | EC | γ s size 12{γs} {} | 0.0933 | 70% | ||
| 0.185 | 35% | ||||||
| 0.300 | 19% | ||||||
| others | |||||||
| 75 Se size 12{rSup { size 8{ 75 {}} }Se} {} | 118.5 d | EC | γ s size 12{γs} {} | 0.121 | 20% | ||
| 0.136 | 65% | ||||||
| 0.265 | 68% | ||||||
| 0.280 | 20% | ||||||
| others | |||||||
| 86 Rb size 12{rSup { size 8{ 86 {}} }Rb} {} | 18.8 d | β − s size 12{β rSup { size 8{ - {}} } s} {} | 0.69 | 9% | γ size 12{γ} {} | 1.08 | 9% |
| 1.77 | 91% | ||||||
| 85 Sr size 12{rSup { size 8{ 85 {}} }Sr} {} | 64.8 d | EC | γ size 12{γ} {} | 0.514 | 100% | ||
| 90 Sr size 12{rSup { size 8{ 90 {}} }Sr} {} | 28.8 y | β− size 12{β rSup { size 8{ - {}} } } {} | 0.546 | 100% | |||
| 90 Y size 12{rSup { size 8{ 90 {}} }Y} {} | 64.1 h | β− size 12{β rSup { size 8{ - {}} } } {} | 2.28 | 100% | |||
| 99m Tc size 12{rSup { size 8{ 99m {}} }Tc} {} | 6.02 h | IT | γ size 12{γ} {} | 0.142 | 100% | ||
| 113m In size 12{rSup { size 8{ 113m {}} }In} {} | 99.5 min | IT | γ size 12{γ} {} | 0.392 | 100% | ||
| 123 I size 12{rSup { size 8{ 123 {}} }I} {} | 13.0 h | EC | γ size 12{γ} {} | 0.159 | ≈100% size 12{ approx "100"%} {} | ||
| 131 I size 12{rSup { size 8{ 131 {}} }I} {} | 8.040 d | β − s size 12{β rSup { size 8{ - {}} } s} {} | 0.248 | 7% | γ s size 12{γs} {} | 0.364 | 85% |
| 0.607 | 93% | others | |||||
| others | |||||||
| 129 Cs size 12{rSup { size 8{ 129 {}} }Cs} {} | 32.3 h | EC | γ s size 12{γs} {} | 0.0400 | 35% | ||
| 0.372 | 32% | ||||||
| 0.411 | 25% | ||||||
| others | |||||||
| 137 Cs size 12{rSup { size 8{ 137 {}} }Cs} {} | 30.17 y | β−s size 12{β rSup { size 8{ - {}} } s} {} | 0.511 | 95% | γ size 12{γ} {} | 0.662 | 95% |
| 1.17 | 5% | ||||||
| 140 Ba size 12{rSup { size 8{ 140 {}} }Ba} {} | 12.79 d | β − size 12{β rSup { size 8{ - {}} } } {} | 1.035 | ≈100% size 12{ approx "100"%} {} | γ s size 12{γs} {} | 0.030 | 25% |
| 0.044 | 65% | ||||||
| 0.537 | 24% | ||||||
| others | |||||||
| 198 Au size 12{rSup { size 8{ 198 {}} }Au} {} | 2.696 d | β− size 12{β rSup { size 8{ - {}} } } {} | 1.161 | ≈100% size 12{ approx "100"%} {} | γ size 12{γ} {} | 0.412 | ≈100% size 12{ approx "100"%} {} |
| 197 Hg size 12{rSup { size 8{ 197 {}} }Hg} {} | 64.1 h | EC | γ size 12{γ} {} | 0.0733 | 100% | ||
| 210 Po size 12{rSup { size 8{ 210 {}} }Po} {} | 138.38 d | α size 12{α} {} | 5.41 | 100% | |||
| 226 Ra size 12{rSup { size 8{ 226 {}} }Ra} {} | 1 . 60 × 10 3 y size 12{1 "." "60" times "10" rSup { size 8{3} } y} {} | α s size 12{αs} {} | 4.68 | 5% | γ size 12{γ} {} | 0.186 | 100% |
| 4.87 | 95% | ||||||
| 235 U size 12{rSup { size 8{ 6 {}} }Li} {} | 7 . 038 × 10 8 y size 12{7 "." "038" times "10" rSup { size 8{8} } y} {} | α size 12{α} {} | 4.68 | ≈100% size 12{ approx "100"%} {} | γ s size 12{γs} {} | numerous | <0.400% |
| 238 U size 12{rSup { size 8{ 6 {}} }Li} {} | 4 . 468 × 10 9 y size 12{4 "." "468" times "10" rSup { size 8{9} } y} {} | α s size 12{αs} {} | 4.22 | 23% | γ size 12{γ} {} | 0.050 | 23% |
| 4.27 | 77% | ||||||
| 237 Np size 12{rSup { size 8{ 237 {}} }Np} {} | 2 . 14 × 10 6 y size 12{2 "." "14" times "10" rSup { size 8{6} } y} {} | α s size 12{αs} {} | numerous | γ s size 12{γs} {} | numerous | <0.250% | |
| 4.96 (max.) | |||||||
| 239 Pu size 12{rSup { size 8{ 239 {}} }Pu} {} | 2 . 41 × 10 4 y size 12{2 "." "41" times "10" rSup { size 8{4} } y} {} | α s size 12{αs} {} | 5.19 | 11% | γ s size 12{γs} {} | 7 . 5 × 10 − 5 size 12{7 "." 5 times "10" rSup { size 8{ - 5} } } {} | 73% |
| 5.23 | 15% | 0.013 | 15% | ||||
| 5.24 | 73% | 0.052 | 10% | ||||
| others | |||||||
| 243 Am size 12{rSup { size 8{ 243 {}} }Am} {} | 7 . 37 × 10 3 y size 12{7 "." "37" times "10" rSup { size 8{3} } y} {} | α s size 12{αs} {} | Max. 5.44 | γ s size 12{γs} {} | 0.075 | ||
| 5.37 | 88% | others | |||||
| 5.32 | 11% | ||||||
| others |
