แฟรนเซียม (Fr) ไม่มีไอโซโทปที่เสถียรทำให้มวลอะตอมของแฟรนเซียมไม่มีค่าที่คงตัว ไอโซโทปของแฟรนเซียมที่เสถียรที่สุดคือ 223Fr ด้วยครึ่งชีวิต 22 นาที ซึ่งไอโซโทปนี้ได้จากการสลายตัวของ 235U ส่วนอื่นๆ คือ 221Fr
ตาราง
สัญลักษณ์ นิวไคลด์ | ชื่อ ดั้งเดิม | Z(p) | N(n) | มวลของไอโซโทป (u) | ครึ่งชีวิต | รูปแบบ การสลายตัว(s) | ไอโซโทป ลูกสาว(s) | nuclear spin | representative isotopic composition (mole fraction) | range of natural variation (mole fraction) |
---|---|---|---|---|---|---|---|---|---|---|
พลังงานกระตุ้น | ||||||||||
199Fr | 87 | 112 | 199.00726(4) | 16(7) ms | 1/2+# | |||||
200Fr | 87 | 113 | 200.00657(8) | 24(10) ms | 196At | 3+# | ||||
200mFr | 60(110) keV | 650(210) ms | α | 196At | 10-# | |||||
(rare) | 200Fr | |||||||||
201Fr | 87 | 114 | 201.00386(8) | 67(3) ms | α (99%) | 197At | (9/2-) | |||
β+ (1%) | 201Rn | |||||||||
202Fr | 87 | 115 | 202.00337(5) | 290(30) ms | α (97%) | 198At | (3+) | |||
β+ (3%) | 202Rn | |||||||||
202mFr | 330(90)# keV | 340(40) ms | α (97%) | 198At | (10-) | |||||
β+ (3%) | 202Rn | |||||||||
203Fr | 87 | 116 | 203.000925(17) | 0.55(2) s | α (95%) | 199At | (9/2-)# | |||
β+ (5%) | 203Rn | |||||||||
204Fr | 87 | 117 | 204.000653(26) | 1.7(3) s | α (96%) | 200At | (3+) | |||
β+ (4%) | 204Rn | |||||||||
204m1Fr | 50(4) keV | 2.6(3) s | α (90%) | 200At | (7+) | |||||
β+ (10%) | 204Rn | |||||||||
204m2Fr | 326(4) keV | 1.7(6) s | (10-) | |||||||
205Fr | 87 | 118 | 204.998594(8) | 3.80(3) s | α (99%) | 201At | (9/2-) | |||
β+ (1%) | 205Rn | |||||||||
206Fr | 87 | 119 | 205.99867(3) | ~16 s | β+ (58%) | 206Rn | (2+,3+) | |||
α (42%) | 202At | |||||||||
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 | α (95%) | 203At | 9/2- | |||
β+ (5%) | 207Rn | |||||||||
208Fr | 87 | 121 | 207.99714(5) | 59.1(3) s | α (90%) | 204At | 7+ | |||
β+ (10%) | 208Rn | |||||||||
209Fr | 87 | 122 | 208.995954(16) | 50.0(3) s | α (89%) | 205At | 9/2- | |||
β+ (11%) | 209Rn | |||||||||
210Fr | 87 | 123 | 209.996408(24) | 3.18(6) min | α (60%) | 206At | 6+ | |||
β+ (40%) | 210Rn | |||||||||
211Fr | 87 | 124 | 210.995537(23) | 3.10(2) min | α (80%) | 207At | 9/2- | |||
β+ (20%) | 211Rn | |||||||||
212Fr | 87 | 125 | 211.996202(28) | 20.0(6) min | β+ (57%) | 212Rn | 5+ | |||
α (43%) | 208At | |||||||||
213Fr | 87 | 126 | 212.996189(8) | 34.6(3) s | α (99.45%) | 209At | 9/2- | |||
β+ (.55%) | 213Rn | |||||||||
214Fr | 87 | 127 | 213.998971(9) | 5.0(2) ms | α | 210At | (1-) | |||
214m1Fr | 123(6) keV | 3.35(5) ms | α | 210At | (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 | α | 211At | 9/2- | |||
216Fr | 87 | 129 | 216.003198(15) | 0.70(2) µs | α | 212At | (1-) | |||
β+ (2×10−7%) | 216Rn | |||||||||
217Fr | 87 | 130 | 217.004632(7) | 16.8(19) µs | α | 213At | 9/2- | |||
218Fr | 87 | 131 | 218.007578(5) | 1.0(6) ms | α | 214At | 1- | |||
218m1Fr | 86(4) keV | 22.0(5) ms | α | 214At | ||||||
IT (rare) | 218Fr | |||||||||
218m2Fr | 200(150)# keV | high | ||||||||
219Fr | 87 | 132 | 219.009252(8) | 20(2) ms | α | 215At | 9/2- | |||
220Fr | 87 | 133 | 220.012327(4) | 27.4(3) s | α (99.65%) | 216At | 1+ | |||
β- (.35%) | 220Ra | |||||||||
221Fr | 87 | 134 | 221.014255(5) | 4.9(2) min | α (99.9%) | 217At | 5/2- | Trace | ||
β- (.1%) | 221Ra | |||||||||
(8.79×−11%) | 207Tl | |||||||||
222Fr | 87 | 135 | 222.017552(23) | 14.2(3) min | β- | 222Ra | 2- | |||
223Fr | แอกทิเนียม K | 87 | 136 | 223.0197359(26) | 22.00(7) min | β- (99.99%) | 223Ra | 3/2(-) | Trace | |
α (.006%) | 219At | |||||||||
224Fr | 87 | 137 | 224.02325(5) | 3.33(10) min | β- | 224Ra | 1- | |||
225Fr | 87 | 138 | 225.02557(3) | 4.0(2) min | β- | 225Ra | 3/2- | |||
226Fr | 87 | 139 | 226.02939(11) | 49(1) s | β- | 226Ra | 1- | |||
227Fr | 87 | 140 | 227.03184(11) | 2.47(3) min | β- | 227Ra | 1/2+ | |||
228Fr | 87 | 141 | 228.03573(22)# | 38(1) s | β- | 228Ra | 2- | |||
229Fr | 87 | 142 | 229.03845(4) | 50.2(4) s | β- | 229Ra | (1/2+)# | |||
230Fr | 87 | 143 | 230.04251(48)# | 19.1(5) s | β- | 230Ra | ||||
231Fr | 87 | 144 | 231.04544(50)# | 17.6(6) s | β- | 231Ra | (1/2+)# | |||
232Fr | 87 | 145 | 232.04977(69)# | 5(1) s | β- | 232Ra |
- Abbreviations:
CD:
IT: - Intermediate of
- Intermediate of
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aefrnesiym Fr immiixosothpthiesthiyrthaihmwlxatxmkhxngaefrnesiymimmikhathikhngtw ixosothpkhxngaefrnesiymthiesthiyrthisudkhux 223Fr dwykhrungchiwit 22 nathi sungixosothpniidcakkarslaytwkhxng 235U swnxun khux 221Frtarangsylksn niwikhld chux dngedim Z p N n mwlkhxngixosothp u khrungchiwit rupaebb karslaytw s ixosothp luksaw s nuclear spin representative isotopic composition mole fraction range of natural variation mole fraction phlngngankratun199Fr 87 112 199 00726 4 16 7 ms 1 2 200Fr 87 113 200 00657 8 24 10 ms 196At 3 200mFr 60 110 keV 650 210 ms a 196At 10 rare 200Fr201Fr 87 114 201 00386 8 67 3 ms a 99 197At 9 2 b 1 201Rn202Fr 87 115 202 00337 5 290 30 ms a 97 198At 3 b 3 202Rn202mFr 330 90 keV 340 40 ms a 97 198At 10 b 3 202Rn203Fr 87 116 203 000925 17 0 55 2 s a 95 199At 9 2 b 5 203Rn204Fr 87 117 204 000653 26 1 7 3 s a 96 200At 3 b 4 204Rn204m1Fr 50 4 keV 2 6 3 s a 90 200At 7 b 10 204Rn204m2Fr 326 4 keV 1 7 6 s 10 205Fr 87 118 204 998594 8 3 80 3 s a 99 201At 9 2 b 1 205Rn206Fr 87 119 205 99867 3 16 s b 58 206Rn 2 3 a 42 202At206m1Fr 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 a 95 203At 9 2 b 5 207Rn208Fr 87 121 207 99714 5 59 1 3 s a 90 204At 7 b 10 208Rn209Fr 87 122 208 995954 16 50 0 3 s a 89 205At 9 2 b 11 209Rn210Fr 87 123 209 996408 24 3 18 6 min a 60 206At 6 b 40 210Rn211Fr 87 124 210 995537 23 3 10 2 min a 80 207At 9 2 b 20 211Rn212Fr 87 125 211 996202 28 20 0 6 min b 57 212Rn 5 a 43 208At213Fr 87 126 212 996189 8 34 6 3 s a 99 45 209At 9 2 b 55 213Rn214Fr 87 127 213 998971 9 5 0 2 ms a 210At 1 214m1Fr 123 6 keV 3 35 5 ms a 210At 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 a 211At 9 2 216Fr 87 129 216 003198 15 0 70 2 µs a 212At 1 b 2 10 7 216Rn217Fr 87 130 217 004632 7 16 8 19 µs a 213At 9 2 218Fr 87 131 218 007578 5 1 0 6 ms a 214At 1 218m1Fr 86 4 keV 22 0 5 ms a 214AtIT rare 218Fr218m2Fr 200 150 keV high219Fr 87 132 219 009252 8 20 2 ms a 215At 9 2 220Fr 87 133 220 012327 4 27 4 3 s a 99 65 216At 1 b 35 220Ra221Fr 87 134 221 014255 5 4 9 2 min a 99 9 217At 5 2 Traceb 1 221Ra 8 79 11 207Tl222Fr 87 135 222 017552 23 14 2 3 min b 222Ra 2 223Fr aexkthieniym K 87 136 223 0197359 26 22 00 7 min b 99 99 223Ra 3 2 Tracea 006 219At224Fr 87 137 224 02325 5 3 33 10 min b 224Ra 1 225Fr 87 138 225 02557 3 4 0 2 min b 225Ra 3 2 226Fr 87 139 226 02939 11 49 1 s b 226Ra 1 227Fr 87 140 227 03184 11 2 47 3 min b 227Ra 1 2 228Fr 87 141 228 03573 22 38 1 s b 228Ra 2 229Fr 87 142 229 03845 4 50 2 4 s b 229Ra 1 2 230Fr 87 143 230 04251 48 19 1 5 s b 230Ra231Fr 87 144 231 04544 50 17 6 6 s b 231Ra 1 2 232Fr 87 145 232 04977 69 5 1 s b 232RaAbbreviations CD IT Intermediate of Intermediate ofraykarxangxinghttp www nucleonica net unc aspx ixosothpkhxngaefrnesiym ixosothpkhxngerediymtarangixosothp