Nuclear Wallet Cards — Z=87


Isotope [1]
Jπ[2]


Δ
(MeV)[3]


T½, Γ, or
Abundance[4]


Decay Mode[5]

Z


El


A


87 Fr 199  12 ms +10-4 α
200  (3+) 6.1s 19 ms +13-6 α
200m (10-) 6.3s 0.57 s +27-14 α
201  (9/2-) 3.7s 69 ms +16-11 α, ε <1%
202  (3+) 3.1s 0.23 s +8-4 α ≈97%, ε ≈3%
202m (10-) 3.2s 0.23 s +14-5 α ≈97%, ε ≈3%
203  (9/2-) 1.0s 0.55 s 2 α ≈95%, ε ≈5%
204  (3+) 0.6s 1.7 s 3 α ≈80%, ε ≈20%
204m (7+) 0.6s 2.6 s 3 α
204m (10-) 0.9s ≈1 s α, IT
205  (9/2-) -1.2 3.85 s 10 α, ε <1%
206  (2+,3+) -1.4 ≈16 s α ≈84%, ε ≈16%
206m (7+) -1.4 15.9 s 1 α 84%, ε 16%
206m (10-) -0.8 0.7 s 1 IT, α ≈12%
207  9/2- -2.9 14.8 s 1 α 95%, ε 5%
208  7+ -2.67 59.1 s 3 α 90%, ε 10%
209  9/2- -3.80 50.0 s 3 α 89%, ε 11%
210  6+ -3.35 3.18 m 6 α 60%, ε 40%
211  9/2- -4.16 3.10 m 2 α >80%, ε <20%
212  5+ -3.54 20.0 m 6 ε 57%, α 43%
213  9/2- -3.563 34.6 s 3 α 99.45%, ε 0.55%
214  (1-) -0.973 5.0 ms 2 α
214m (8-) -0.851 3.35 ms 5 α
215  9/2- 0.304 86 ns 5 α
216  (1-) 2.97 0.70 µs 2 α, ε <2.0×10-7%
216m (3-) 3.10 71 ns 5 α >50%
217  9/2- 4.300 22 µs 5 α
218  1- 7.045 1.0 ms 6 α
218m 7.131 22.0 ms 5 α, IT
219  9/2- 8.608 20 ms 2 α
220  1+ 11.47 27.4 s 3 α 99.65%, β- 0.35%
221  5/2- 13.270 4.9 m 2 α, β- <0.1%, 14C 9×10-13%
222  2- 16.34 14.2 m 3 β-
223  3/2(-) 18.379 22.00 m 7 β- 99.99%, α 6.0×10-3%
224  1- 21.64 3.33 m 10 β-
225  3/2- 23.85 4.0 m 2 β-
226  1- 27.33 49 s 1 β-
227  1/2+ 29.65 2.47 m 3 β-
228  2- 33.3s 38 s 1 β-
229  (1/2+) 35.8s 50.2 s 4 β-
230  39.6s 19.1 s 5 β-
231  42.3s 17.5 s 8 β-
232  46.3s 5 s 1 β-

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