Английская Википедия:Isotopes of radium

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Шаблон:Short description Шаблон:Infobox radium isotopes Radium (₈₈Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is ²²⁶Ra with a half-life of Шаблон:Val. ²²⁶Ra occurs in the decay chain of ²³⁸U (often referred to as the radium series). Radium has 34 known isotopes from ²⁰¹Ra to ²³⁴Ra.

In 2013 it was discovered that the nucleus of radium-224 is pear-shaped. This was the first discovery of an asymmetrical nucleus.

List of isotopes

Шаблон:Isotopes table |- | ²⁰¹Ra | | style="text-align:right" | 88 | style="text-align:right" | 113 | | Шаблон:Val | α | ¹⁹⁷Rn | (3/2−) | |- | style="text-indent:1em" | ^201mRa | | colspan="3" style="text-indent:2em" | 260(30) keV | Шаблон:Val | α | ^197mRn | (13/2+) | |- | Шаблон:Anchor²⁰²Ra | | style="text-align:right" | 88 | style="text-align:right" | 114 | 202.00989(7) | Шаблон:Val | α | ¹⁹⁸Rn | 0+ | |- | rowspan=2|Шаблон:Anchor²⁰³Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 115 | rowspan=2|203.00927(9) | rowspan=2|4(3) ms | α | ¹⁹⁹Rn | rowspan=2|(3/2−) | rowspan=2| |- | β⁺ (rare) | ²⁰³Fr |- | rowspan=2 style="text-indent:1em" | ^203mRa | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 220(90) keV | rowspan=2|41(17) ms | α | ¹⁹⁹Rn | rowspan=2|(13/2+) | rowspan=2| |- | β⁺ (rare) | ²⁰³Fr |- | rowspan=2|²⁰⁴Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 116 | rowspan=2|204.006500(17) | rowspan=2|60(11) ms
[59(+12−9) ms] | α (99.7%) | ²⁰⁰Rn | rowspan=2|0+ | rowspan=2| |- | β⁺ (.3%) | ²⁰⁴Fr |- | rowspan=2|²⁰⁵Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 117 | rowspan=2|205.00627(9) | rowspan=2|220(40) ms
[210(+60−40) ms] | α | ²⁰¹Rn | rowspan=2|(3/2−) | rowspan=2| |- | β⁺ (rare) | ²⁰⁵Fr |- | rowspan=2 style="text-indent:1em" | ^205mRa | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 310(110)# keV | rowspan=2|180(50) ms
[170(+60−40) ms] | α | ²⁰¹Rn | rowspan=2|(13/2+) | rowspan=2| |- | IT (rare) | ²⁰⁵Ra |- | ²⁰⁶Ra | | style="text-align:right" | 88 | style="text-align:right" | 118 | 206.003827(19) | 0.24(2) s | α | ²⁰²Rn | 0+ | |- | rowspan=2|²⁰⁷Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 119 | rowspan=2|207.00380(6) | rowspan=2|1.3(2) s | α (90%) | ²⁰³Rn | rowspan=2|(5/2−, 3/2−) | rowspan=2| |- | β⁺ (10%) | ²⁰⁷Fr |- | rowspan=3 style="text-indent:1em" | ^207mRa | rowspan=3| | rowspan=3 colspan="3" style="text-indent:2em" | 560(50) keV | rowspan=3|57(8) ms | IT (85%) | ²⁰⁷Ra | rowspan=3|(13/2+) | rowspan=3| |- | α (15%) | ²⁰³Rn |- | β⁺ (.55%) | ²⁰⁷Fr |- | rowspan=2|²⁰⁸Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 120 | rowspan=2|208.001840(17) | rowspan=2|1.3(2) s | α (95%) | ²⁰⁴Rn | rowspan=2|0+ | rowspan=2| |- | β⁺ (5%) | ²⁰⁸Fr |- | style="text-indent:1em" | ^208mRa | | colspan="3" style="text-indent:2em" | 1800(200) keV | 270 ns | | | (8+) | |- | rowspan=2|²⁰⁹Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 121 | rowspan=2|209.00199(5) | rowspan=2|4.6(2) s | α (90%) | ²⁰⁵Rn | rowspan=2|5/2− | rowspan=2| |- | β⁺ (10%) | ²⁰⁹Fr |- | rowspan=2|²¹⁰Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 122 | rowspan=2|210.000495(16) | rowspan=2|3.7(2) s | α (96%) | ²⁰⁶Rn | rowspan=2|0+ | rowspan=2| |- | β⁺ (4%) | ²¹⁰Fr |- | style="text-indent:1em" | ^210mRa | | colspan="3" style="text-indent:2em" | 1800(200) keV | 2.24 μs | | | (8+) | |- | rowspan=2|²¹¹Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 123 | rowspan=2|211.000898(28) | rowspan=2|13(2) s | α (97%) | ²⁰⁷Rn | rowspan=2|5/2(−) | rowspan=2| |- | β⁺ (3%) | ²¹¹Fr |- | rowspan=2|²¹²Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 124 | rowspan=2|211.999794(12) | rowspan=2|13.0(2) s | α (85%) | ²⁰⁸Rn | rowspan=2|0+ | rowspan=2| |- | β⁺ (15%) | ²¹²Fr |- | style="text-indent:1em" | ^212m1Ra | | colspan="3" style="text-indent:2em" | 1958.4(5) keV | 10.9(4) μs | | | (8)+ | |- | style="text-indent:1em" | ^212m2Ra | | colspan="3" style="text-indent:2em" | 2613.4(5) keV | 0.85(13) μs | | | (11)− | |- | rowspan=2|²¹³Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 125 | rowspan=2|213.000384(22) | rowspan=2|2.74(6) min | α (80%) | ²⁰⁹Rn | rowspan=2|1/2− | rowspan=2| |- | β⁺ (20%) | ²¹³Fr |- | rowspan=2 style="text-indent:1em" | ^213mRa | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 1769(6) keV | rowspan=2|2.1(1) ms | IT (99%) | ²¹³Ra | rowspan=2|17/2−# | rowspan=2| |- | α (1%) | ²⁰⁹Rn |- | rowspan=2|²¹⁴Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 126 | rowspan=2|214.000108(10) | rowspan=2|2.46(3) s | α (99.94%) | ²¹⁰Rn | rowspan=2|0+ | rowspan=2| |- | β⁺ (.06%) | ²¹⁴Fr |- | ²¹⁵Ra | | style="text-align:right" | 88 | style="text-align:right" | 127 | 215.002720(8) | 1.55(7) ms | α | ²¹¹Rn | (9/2+)# | |- | style="text-indent:1em" | ^215m1Ra | | colspan="3" style="text-indent:2em" | 1877.8(5) keV | 7.1(2) μs | | | (25/2+) | |- | style="text-indent:1em" | ^215m2Ra | | colspan="3" style="text-indent:2em" | 2246.9(5) keV | 1.39(7) μs | | | (29/2−) | |- | style="text-indent:1em" | ^215m3Ra | | colspan="3" style="text-indent:2em" | 3756.6(6)+X keV | 0.555(10) μs | | | (43/2−) | |- | rowspan=2|²¹⁶Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 128 | rowspan=2|216.003533(9) | rowspan=2|182(10) ns | α | ²¹²Rn | rowspan=2|0+ | rowspan=2| |- | EC (<1×10⁻⁸%) | ²¹⁶Fr |- | ²¹⁷Ra | | style="text-align:right" | 88 | style="text-align:right" | 129 | 217.006320(9) | 1.63(17) μs | α | ²¹³Rn | (9/2+) | |- |²¹⁸Ra | | style="text-align:right" | 88 |style="text-align:right" | 130 |218.007140(12) |25.2(3) μs | α | ²¹⁴Rn |0+ | |- | ²¹⁹Ra | | style="text-align:right" | 88 | style="text-align:right" | 131 | 219.010085(9) | 10(3) ms | α | ²¹⁵Rn | (7/2)+ | |- | ²²⁰Ra | | style="text-align:right" | 88 | style="text-align:right" | 132 | 220.011028(10) | 17.9(14) ms | α | ²¹⁶Rn | 0+ | |- | rowspan=2|²²¹Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 133 | rowspan=2|221.013917(5) | rowspan=2|28(2) s | α | ²¹⁷Rn | rowspan=2|5/2+ | rowspan=2|Trace |- | CD (1.2×10⁻¹⁰%) | ²⁰⁷Pb
¹⁴C |- | rowspan=2|²²²Ra | rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 134 | rowspan=2|222.015375(5) | rowspan=2|38.0(5) s | α | ²¹⁸Rn | rowspan=2|0+ | rowspan=2| |- | CD (3×10⁻⁸%) | ²⁰⁸Pb
¹⁴C |- | rowspan=2|²²³Ra | rowspan=2|Actinium X | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 135 | rowspan=2|223.0185022(27) | rowspan=2|11.43(5) d | α | ²¹⁹Rn | rowspan=2|3/2+ | rowspan=2|Trace |- | CD (6.4×10⁻⁸%) | ²⁰⁹Pb
¹⁴C |- | rowspan=2|²²⁴Ra | rowspan=2|Thorium X | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 136 | rowspan=2|224.0202118(24) | rowspan=2|3.6319(23) d | α | ²²⁰Rn | rowspan=2|0+ | rowspan=2|Trace |- | CD (4.3×10⁻⁹%) | ²¹⁰Pb
¹⁴C |- |rowspan=2| ²²⁵Ra |rowspan=2| | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 137 | rowspan=2| 225.023612(3) | rowspan=2| 14.9(2) d |β⁻ | ²²⁵Ac | rowspan=2| 1/2+ | rowspan=2| Trace |- |α (2.0Шаблон:E%) |²²¹Rn |- | rowspan=2|Шаблон:Anchor²²⁶Ra | rowspan=2|Radium | rowspan=2 style="text-align:right" | 88 | rowspan=2 style="text-align:right" | 138 | rowspan=2|226.0254098(25) | rowspan=2|1600(7) y | αШаблон:R | ²²²Rn | rowspan=2|0+ | rowspan=2|Trace |- | CD (2.6×10⁻⁹%) | ²¹²Pb
¹⁴C |- | ²²⁷Ra | | style="text-align:right" | 88 | style="text-align:right" | 139 | 227.0291778(25) | 42.2(5) min | β⁻ | ²²⁷Ac | 3/2+ | |- | ²²⁸Ra | Mesothorium 1 | style="text-align:right" | 88 | style="text-align:right" | 140 | 228.0310703(26) | 5.75(3) y | β⁻ | ²²⁸Ac | 0+ | Trace |- | ²²⁹Ra | | style="text-align:right" | 88 | style="text-align:right" | 141 | 229.034958(20) | 4.0(2) min | β⁻ | ²²⁹Ac | 5/2(+) | |- | ²³⁰Ra | | style="text-align:right" | 88 | style="text-align:right" | 142 | 230.037056(13) | 93(2) min | β⁻ | ²³⁰Ac | 0+ | |- | ²³¹Ra | | style="text-align:right" | 88 | style="text-align:right" | 143 | 231.04122(32)# | 103(3) s | β⁻ | ²³¹Ac | (5/2+) | |- | style="text-indent:1em" | ^231mRa | | colspan="3" style="text-indent:2em" | 66.21(9) keV | ~53 μs | | | (1/2+) | |- | ²³²Ra | | style="text-align:right" | 88 | style="text-align:right" | 144 | 232.04364(30)# | 250(50) s | β⁻ | ²³²Ac | 0+ | |- | ²³³Ra | | style="text-align:right" | 88 | style="text-align:right" | 145 | 233.04806(50)# | 30(5) s | β⁻ | ²³³Ac | 1/2+# | |- | ²³⁴Ra | | style="text-align:right" | 88 | style="text-align:right" | 146 | 234.05070(53)# | 30(10) s | β⁻ | ²³⁴Ac | 0+ | 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