Английская Википедия:Isotopes of francium

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Шаблон:Short description Шаблон:Infobox francium isotopes Francium (₈₇Fr) has no stable isotopes. A standard atomic weight cannot be given. Its most stable isotope is ²²³Fr with a half-life of 22 minutes, occurring in trace quantities in nature as an intermediate decay product of ²³⁵U.

Of elements whose most stable isotopes have been identified with certainty, francium is the most unstable. All elements with atomic number of 106 (seaborgium) or greater have most-stable-known isotopes shorter than that of francium, but as those elements have only a relatively small number of isotopes discovered, the possibility remains that undiscovered isotopes of these elements may have longer half-lives.

List of isotopes

Шаблон:Isotopes table |- | ¹⁹⁷Fr | | style="text-align:right" | 87 | style="text-align:right" | 110 | 197.01101(6) | 2.3(19) ms | α | ¹⁹³At | (7/2−) | |- | ¹⁹⁸Fr | | style="text-align:right" | 87 | style="text-align:right" | 111 | 198.01028(3) | 15(3) ms | α | ¹⁹⁴At | 3+# | |- | ¹⁹⁹Fr | | style="text-align:right" | 87 | style="text-align:right" | 112 | 199.00726(4) | 16(7) ms | α | ¹⁹⁵At | 1/2+# | |- | ²⁰⁰Fr | | style="text-align:right" | 87 | style="text-align:right" | 113 | 200.00657(8) | 24(10) ms | α | ¹⁹⁶At | 3+# | |- | rowspan=2 style="text-indent:1em" | ^200mFr | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 60(110) keV | rowspan=2|650(210) ms | α | ¹⁹⁶At | rowspan=2|10−# | rowspan=2| |- | IT (rare) | ²⁰⁰Fr |- | rowspan=2|²⁰¹Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 114 | rowspan=2|201.00386(8) | rowspan=2|67(3) ms | α (99%) | ¹⁹⁷At | rowspan=2|(9/2−) | rowspan=2| |- | β⁺ (1%) | ²⁰¹Rn |- | rowspan=2|²⁰²Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 115 | rowspan=2|202.00337(5) | rowspan=2|290(30) ms | α (97%) | ¹⁹⁸At | rowspan=2|(3+) | rowspan=2| |- | β⁺ (3%) | ²⁰²Rn |- | rowspan=2 style="text-indent:1em" | ^202mFr | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 330(90)# keV | rowspan=2|340(40) ms | α (97%) | ¹⁹⁸At | rowspan=2|(10−) | rowspan=2| |- | β⁺ (3%) | ²⁰²Rn |- | rowspan=2|²⁰³Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 116 | rowspan=2|203.000925(17) | rowspan=2|0.55(2) s | α (95%) | ¹⁹⁹At | rowspan=2|(9/2−)# | rowspan=2| |- | β⁺ (5%) | ²⁰³Rn |- | rowspan=2|²⁰⁴Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 117 | rowspan=2|204.000653(26) | rowspan=2|1.7(3) s | α (96%) | ²⁰⁰At | rowspan=2|(3+) | rowspan=2| |- | β⁺ (4%) | ²⁰⁴Rn |- | rowspan=2 style="text-indent:1em" | ^204m1Fr | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 50(4) keV | rowspan=2|2.6(3) s | α (90%) | ²⁰⁰At | rowspan=2|(7+) | rowspan=2| |- | β⁺ (10%) | ²⁰⁴Rn |- | style="text-indent:1em" | ^204m2Fr | | colspan="3" style="text-indent:2em" | 326(4) keV | 1.7(6) s | | | (10−) | |- | rowspan=2|²⁰⁵Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 118 | rowspan=2|204.998594(8) | rowspan=2|3.80(3) s | α (99%) | ²⁰¹At | rowspan=2|(9/2−) | rowspan=2| |- | β⁺ (1%) | ²⁰⁵Rn |- | rowspan=2|²⁰⁶Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 119 | rowspan=2|205.99867(3) | rowspan=2|~16 s | β⁺ (58%) | ²⁰⁶Rn | rowspan=2|(2+, 3+) | rowspan=2| |- | α (42%) | ²⁰²At |- | style="text-indent:1em" | ^206m1Fr | | colspan="3" style="text-indent:2em" | 190(40) keV | 15.9(1) s | | | (7+) | |- | style="text-indent:1em" | ^206m2Fr | | colspan="3" style="text-indent:2em" | 730(40) keV | 700(100) ms | | | (10−) | |- | rowspan=2|²⁰⁷Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 120 | rowspan=2|206.99695(5) | rowspan=2|14.8(1) s | α (95%) | ²⁰³At | rowspan=2|9/2− | rowspan=2| |- | β⁺ (5%) | ²⁰⁷Rn |- | rowspan=2|²⁰⁸Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 121 | rowspan=2|207.99714(5) | rowspan=2|59.1(3) s | α (90%) | ²⁰⁴At | rowspan=2|7+ | rowspan=2| |- | β⁺ (10%) | ²⁰⁸Rn |- | rowspan=2|²⁰⁹Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 122 | rowspan=2|208.995954(16) | rowspan=2|50.0(3) s | α (89%) | ²⁰⁵At | rowspan=2|9/2− | rowspan=2| |- | β⁺ (11%) | ²⁰⁹Rn |- | rowspan=2|²¹⁰Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 123 | rowspan=2|209.996408(24) | rowspan=2|3.18(6) min | α (60%) | ²⁰⁶At | rowspan=2|6+ | rowspan=2| |- | β⁺ (40%) | ²¹⁰Rn |- | rowspan=2|²¹¹Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 124 | rowspan=2|210.995537(23) | rowspan=2|3.10(2) min | α (80%) | ²⁰⁷At | rowspan=2|9/2− | rowspan=2| |- | β⁺ (20%) | ²¹¹Rn |- | rowspan=2|²¹²Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 125 | rowspan=2|211.996202(28) | rowspan=2|20.0(6) min | β⁺ (57%) | ²¹²Rn | rowspan=2|5+ | rowspan=2| |- | α (43%) | ²⁰⁸At |- | rowspan=2|²¹³Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 126 | rowspan=2|212.996189(8) | rowspan=2|34.14(6) s | α (99.45%) | ²⁰⁹At | rowspan=2|9/2− | rowspan=2| |- | β⁺ (.55%) | ²¹³Rn |- | ²¹⁴Fr | | style="text-align:right" | 87 | style="text-align:right" | 127 | 213.998971(9) | 5.0(2) ms | α | ²¹⁰At | (1−) | |- | style="text-indent:1em" | ^214m1Fr | | colspan="3" style="text-indent:2em" | 123(6) keV | 3.35(5) ms | α | ²¹⁰At | (8−) | |- | style="text-indent:1em" | ^214m2Fr | | colspan="3" style="text-indent:2em" | 638(6) keV | 103(4) ns | | | (11+) | |- | style="text-indent:1em" | ^214m3Fr | | colspan="3" style="text-indent:2em" | 6477+Y keV | 108(7) ns | | | (33+) | |- | ²¹⁵Fr | | style="text-align:right" | 87 | style="text-align:right" | 128 | 215.000341(8) | 86(5) ns | α | ²¹¹At | 9/2− | |- |²¹⁶Fr | | style="text-align:right" | 87 | style="text-align:right" | 129 |216.003198(15) |0.70(2) μs | α | ²¹²At |(1−) | |- | ²¹⁷Fr | | style="text-align:right" | 87 | style="text-align:right" | 130 | 217.004632(7) | 16.8(19) μs | α | ²¹³At | 9/2− | |- | ²¹⁸Fr | | style="text-align:right" | 87 | style="text-align:right" | 131 | 218.007578(5) | 1.0(6) ms | α | ²¹⁴At | 1− | |- | rowspan=2 style="text-indent:1em" | ^218m1Fr | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 86(4) keV | rowspan=2|22.0(5) ms | α | ²¹⁴At | rowspan=2| | rowspan=2| |- | IT (rare) | ²¹⁸Fr |- | style="text-indent:1em" | ^218m2Fr | | colspan="3" style="text-indent:2em" | 200(150)# keV | | | | high | |- | ²¹⁹Fr | | style="text-align:right" | 87 | style="text-align:right" | 132 | 219.009252(8) | 20(2) ms | α | ²¹⁵At | 9/2− | |- | rowspan=2|²²⁰Fr | rowspan=2| | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 133 | rowspan=2|220.012327(4) | rowspan=2|27.4(3) s | α (99.65%) | ²¹⁶At | rowspan=2|1+ | rowspan=2| |- | β⁻ (.35%) | ²²⁰Ra |- | rowspan=3|²²¹Fr | rowspan=3| | rowspan=3 style="text-align:right" | 87 | rowspan=3 style="text-align:right" | 134 | rowspan=3|221.014255(5) | rowspan=3|4.9(2) min | α (99.9%) | ²¹⁷At | rowspan=3|5/2− | rowspan=3|Trace |- | β⁻ (.1%) | ²²¹Ra |- | CD (8.79×10⁻¹¹%) | ²⁰⁷Tl
¹⁴C |- | ²²²Fr | | style="text-align:right" | 87 | style="text-align:right" | 135 | 222.017552(23) | 14.2(3) min | β⁻ | ²²²Ra | 2− | |- | rowspan=2|²²³Fr | rowspan=2|Actinium K | rowspan=2 style="text-align:right" | 87 | rowspan=2 style="text-align:right" | 136 | rowspan=2|223.0197359(26) | rowspan=2|22.00(7) min | β⁻ (99.99%) | ²²³Ra | rowspan=2|3/2(−) | rowspan=2|Trace |- | α (.006%) | ²¹⁹At |- | ²²⁴Fr | | style="text-align:right" | 87 | style="text-align:right" | 137 | 224.02325(5) | 3.33(10) min | β⁻ | ²²⁴Ra | 1− | |- | ²²⁵Fr | | style="text-align:right" | 87 | style="text-align:right" | 138 | 225.02557(3) | 4.0(2) min | β⁻ | ²²⁵Ra | 3/2− | |- | ²²⁶Fr | | style="text-align:right" | 87 | style="text-align:right" | 139 | 226.02939(11) | 49(1) s | β⁻ | ²²⁶Ra | 1− | |- | ²²⁷Fr | | style="text-align:right" | 87 | style="text-align:right" | 140 | 227.03184(11) | 2.47(3) min | β⁻ | ²²⁷Ra | 1/2+ | |- | ²²⁸Fr | | style="text-align:right" | 87 | style="text-align:right" | 141 | 228.03573(22)# | 38(1) s | β⁻ | ²²⁸Ra | 2− | |- | ²²⁹Fr | | style="text-align:right" | 87 | style="text-align:right" | 142 | 229.03845(4) | 50.2(4) s | β⁻ | ²²⁹Ra | (1/2+)# | |- | ²³⁰Fr | | style="text-align:right" | 87 | style="text-align:right" | 143 | 230.04251(48)# | 19.1(5) s | β⁻ | ²³⁰Ra | | |- | ²³¹Fr | | style="text-align:right" | 87 | style="text-align:right" | 144 | 231.04544(50)# | 17.6(6) s | β⁻ | ²³¹Ra | (1/2+)# | |- | ²³²Fr | | style="text-align:right" | 87 | style="text-align:right" | 145 | 232.04977(69)# | 5(1) s | β⁻ | ²³²Ra | | |- | ²³³Fr | | style="text-align:right" | 87 | style="text-align:right" | 146 | 233.052518(21) | 900(100) ms | β⁻ | ²³³Ra | 1/2+ # | Шаблон:Isotopes table/footer

References

• Isotope masses from:
  • Шаблон:NUBASE 2003
• Isotopic compositions and standard atomic masses from:
  • Шаблон:CIAAW2003
  • Шаблон:CIAAW 2005
• Half-life, spin, and isomer data selected from the following sources.
  • Шаблон:NUBASE 2003
  • Шаблон:NNDC
  • Шаблон:CRC85