ایزوتوپ‌های فرانسیم

(تغییرمسیر از فرانسیم-218)

فرانسیوم (Fr)عنصری است که هیچ ایزوتوپ پایداری ندارد.

نماد
هسته
Z(p) N(n)  
جرم ایزوتوپ (u)
 
نیمه عمر اسپین
هسته
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
انرژی تحریک
199Fr 87 112 199.00726(4) 16(7) ms 1/2+#
200Fr 87 113 200.00657(8) 24(10) ms 3+#
200mFr 60(110) keV 650(210) ms 10-#
201Fr 87 114 201.00386(8) 67(3) ms (9/2-)
202Fr 87 115 202.00337(5) 290(30) ms (3+)
202mFr 330(90)# keV 340(40) ms (10-)
203Fr 87 116 203.000925(17) 0.55(2) s (9/2-)#
204Fr 87 117 204.000653(26) 1.7(3) s (3+)
204m1Fr 50(4) keV 2.6(3) s (7+)
204m2Fr 326(4) keV 1.7(6) s (10-)
205Fr 87 118 204.998594(8) 3.80(3) s (9/2-)
206Fr 87 119 205.99867(3) ~16 s (2+,3+)
206m1Fr 190(40) keV 15.9(1) s (7+)
206m2Fr 730(40) keV 700(100) ms (10-)
207Fr 87 120 206.99695(5) 14.8(1) s 9/2-
208Fr 87 121 207.99714(5) 59.1(3) s 7+
209Fr 87 122 208.995954(16) 50.0(3) s 9/2-
210Fr 87 123 209.996408(24) 3.18(6) min 6+
211Fr 87 124 210.995537(23) 3.10(2) min 9/2-
212Fr 87 125 211.996202(28) 20.0(6) min 5+
213Fr 87 126 212.996189(8) 34.6(3) s 9/2-
214Fr 87 127 213.998971(9) 5.0(2) ms (1-)
214m1Fr 123(6) keV 3.35(5) ms (8-)
214m2Fr 638(6) keV 103(4) ns (11+)
214m3Fr 6477+Y keV 108(7) ns (33+)
215Fr 87 128 215.000341(8) 86(5) ns 9/2-
216Fr 87 129 216.003198(15) 0.70(2) µs (1-)
217Fr 87 130 217.004632(7) 16.8(19) µs 9/2-
218Fr 87 131 218.007578(5) 1.0(6) ms 1-
218m1Fr 86(4) keV 22.0(5) ms
218m2Fr 200(150)# keV high
219Fr 87 132 219.009252(8) 20(2) ms 9/2-
220Fr 87 133 220.012327(4) 27.4(3) s 1+
221Fr 87 134 221.014255(5) 4.9(2) min 5/2-
222Fr 87 135 222.017552(23) 14.2(3) min 2-
223Fr 87 136 223.0197359(26) 22.00(7) min 3/2(-)
224Fr 87 137 224.02325(5) 3.33(10) min 1-
225Fr 87 138 225.02557(3) 4.0(2) min 3/2-
226Fr 87 139 226.02939(11) 49(1) s 1-
227Fr 87 140 227.03184(11) 2.47(3) min 1/2+
228Fr 87 141 228.03573(22)# 38(1) s 2-
229Fr 87 142 229.03845(4) 50.2(4) s (1/2+)#
230Fr 87 143 230.04251(48)# 19.1(5) s
231Fr 87 144 231.04544(50)# 17.6(6) s (1/2+)#
232Fr 87 145 232.04977(69)# 5(1) s

یادداشت‌ها

ویرایش
  • Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
  • Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

منابع

ویرایش