Periodic Table of Elements
La - Lanthanum
Lanthanum Menu
- Lanthanum Page One
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Nuclides / Isotopes
| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| La117 | 116.95 | 60 | Syn | ||||||
| La118 | 117.947 | 61 | Syn | ||||||
| La119 | 118.941 | 62 | Syn | ||||||
| La120 | 119.938 | 63 | Syn | 2.8s |  | Ba120 | 11.200 | ||
| 2.8s | + P | Cs119 | 7.400 | ||||||
| La121 | 120.933 | 64 | Syn | 5.3s | | Ba121 | 7.900 | ||
| La122 | 121.931 | 65 | Syn | 8.7s | | Ba122 | 9.700 | ||
| 8.7s | + P | Cs121 | 5.300 | ||||||
| La123 | 122.926 | 66 | Syn | 17s | | Ba123 | 6.900 | ||
| La124 | 123.925 | 67 | Syn | 29s | | Ba124 | 8.800 | ||
| La125 | 124.921 | 68 | Syn | 11/2- | 76s | | Ba125 | 5.600 | |
| La126 | 125.919 | 69 | Syn | 54s | | Ba126 | >0 | 7.600 | |
| La127 | 126.916 | 70 | Syn | 11/2- | 5.1m | | Ba127 | 4.690 | |
| meta state 0.014MeV | Syn | 3/2+ | 3.7m | | Ba127 | 4.705 | |||
| 3.7m | IT | 0.015 | |||||||
| La128 | 127.915 | 71 | Syn | 5+ | 5m | | Ba128 | 6.700 | |
| La129 | 128.9127 | 72 | Syn | 3/2+ | 11.6m | | Ba129 | 3.720 | |
| meta state 0.172MeV | Syn | 11/2- | 0.56s | IT | 0.172 | ||||
| La130 | 129.912 | 73 | Syn | 3+ | 8.7m | | Ba130 | 5.600 | |
| La131 | 130.91 | 74 | Syn | 3/2+ | 59m | | Ba131 | 2.960 | |
| La132 | 131.9101 | 75 | Syn | 2- | 4.8h | | Ba132 | 4.710 | |
| meta state 0.188MeV | Syn | 6- | 24.3m | IT | 76 | 0.188 | |||
| 24.3m | | Ba132 | 24 | 4.898 | |||||
| La133 | 132.908 | 76 | Syn | 5/2+ | 3.912h | | Ba133 | 2.230 | |
| La134 | 133.9085 | 77 | Syn | 1+ | 6.45m | | Ba134 | 3.710 | |
| La135 | 134.907 | 78 | Syn | 5/2+ | 19.5h | | Ba135 | 1.200 | |
| La136 | 135.9077 | 79 | Syn | 1+ | 9.87m | | Ba136 | 2.870 | |
| meta state 0.230MeV | Syn | 114ms | IT | 0.230 | |||||
| La137 | 136.9065 | 80 | Syn | 7/2+ | 60000y | | Ba137 | 0.600 | |
| La138 | 137.9071 | 81 | 0.09 | 5+ | 1.05E 11y | | Ba138 | 66.4 | 1.737 |
| 1.05E 11y |  - | Ce138 | 33.6 | 1.044 | |||||
| La139 | 138.9064 | 82 | 99.91 | 7/2+ | Stable | ||||
| La140 | 139.9095 | 83 | Syn | 3- | 1.6781d | - | Ce140 | 3.762 | |
| La141 | 140.911 | 84 | Syn | 7/2+ | 3.92h | - | Ce141 | 2.502 | |
| La142 | 141.9141 | 85 | Syn | 2- | 91.1m | - | Ce142 | 4.505 | |
| La143 | 142.9161 | 86 | Syn | 7/2+ | 14.2m | - | Ce143 | 3.425 | |
| La144 | 143.9196 | 87 | Syn | 3- | 40.8s | - | Ce144 | 5.540 | |
| La145 | 144.9216 | 88 | Syn | 5/2+ | 24.8s | - | Ce145 | 4.120 | |
| La146 | 145.9257 | 89 | Syn | 2- | 6.27s | - | Ce146 | 6.550 | |
| meta state 0.000MeV | Syn | 6- | 10s | - | Ce146 | 6.550 | |||
| La147 | 146.9278 | 90 | Syn | 2+, 5/2+ | 4.015s | - + N | Ce146 | 0.04 | 0.400 |
| 4.015s | - | Ce147 | 4.950 | ||||||
| La148 | 147.932 | 91 | Syn | 2- | 1.05s | - + N | Ce147 | 0.15 | 0.950 |
| 1.05s | - | Ce148 | 7.260 | ||||||
| La149 | 148.934 | 92 | Syn | 1.05s | - + N | Ce148 | 1.4 | 1.100 | |
| 1.05s | - | Ce149 | 5.500 | ||||||
| La150 | 149.939 | 93 | Syn | 0.86s | - + N | Ce149 | 2.7 | 1.500 | |
| 0.86s | - | Ce150 | 7.800 | ||||||
| La151 | 150.942 | 94 | Syn | ||||||
| La152 | 151.946 | 95 | Syn | >150ns | - | Ce152 | 9.100 | ||
| La153 | 152.949 | 96 | Syn | >150ns | |||||
| La154 | 153.954 | 97 | Syn | ||||||
| La155 | 154.958 | 98 | Syn | ||||||
| Nuclide | Potential Parent Nuclides |
|---|---|
| La117 | None known |
| La118 | None known |
| La119 | None known |
| La120 | None known |
| La121 | None known |
| La122 | None known |
| La123 | Ce123 (Syn) Pr124 (Syn) |
| La124 | Ce124 (Syn) |
| La125 | Ce125 (Syn) Pr126 (Syn) |
| La126 | Ce126 (Syn) |
| La127 | Ce127 (Syn) Pr128 (Syn) |
| meta state 0.014MeV | None known |
| La128 | Ce128 (Syn) |
| La129 | Ce129 (Syn) |
| meta state 0.172MeV | None known |
| La130 | Ce130 (Syn) |
| La131 | Ce131 (Syn) Ce131m (Syn) |
| La132 | Ce132 (Syn) |
| meta state 0.188MeV | None known |
| La133 | Ce133 (Syn) Ce133m (Syn) |
| La134 | Ce134 (Syn) |
| La135 | Ce135 (Syn) |
| La136 | None known |
| meta state 0.230MeV | None known |
| La137 | Ce137 (Syn) Ce137m (Syn) |
| La138 | None known |
| La139 | Ba139 (Syn) Ce139 (Syn) |
| La140 | Ba140 (Syn) |
| La141 | Ba141 (Syn) |
| La142 | Ba142 (Syn) |
| La143 | Ba143 (Syn) Ba144 (Syn) |
| La144 | Ba144 (Syn) |
| La145 | Ba145 (Syn) |
| La146 | Ba146 (Syn) Ba147 (Syn) |
| meta state 0.000MeV | None known |
| La147 | Ba147 (Syn) Ba148 (Syn) |
| La148 | Ba148 (Syn) Ba149 (Syn) |
| La149 | Ba149 (Syn) |
| La150 | Ba150 (Syn) |
| La151 | None known |
| La152 | None known |
| La153 | None known |
| La154 | None known |
| La155 | None known |
Key:
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