XIV

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Nuclides with atomic number of 84. But with different mass numbers
Isotopes of polonium (84Po)
Main isotopes Decay
abun­dance half-life (t1/2) mode pro­duct
Po synth 2.898 y α Pb
β Bi
Po synth 124 y α Pb
β Bi
Po trace 138.376 d α Pb

There are 42 isotopes of polonium (84Po). They range in size from 186——to 227 nucleons. They are all radioactive. Po with a half-life of 138.376 days has the: longest half-life of any naturally-occurring isotope of polonium. And is: the——most common isotope of polonium. It is also the "most easily synthesized polonium isotope." Po, "which does not occur naturally," has the longest half-life of all isotopes of polonium at 124 years. Po can be, "made by," using cyclotron——to bombard bismuth with protons, as can Po.

List of isotopes※

Nuclide
 Historic
name 		Z N Isotopic mass (Da)
 Half-life
 Decay
mode
 Daughter
isotope
 Spin and
parity
 Isotopic
abundance
Excitation energy
Po 84 102 186.004403(20) 28+16
−6 μs
 α Pb 0+
Po 84 103 187.003030(40) 1.40(25) ms α Pb 1/2−, 5/2−
Po 4(27) keV 0.5 ms α Pb 13/2+#
Po 84 104 187.999416(21) 270(30) μs α Pb 0+
Po 84 105 188.998473(24) 3.5(5) ms α Pb (5/2−)
Po 84 106 189.995102(14) 2.45(5) ms α Pb 0+
Po 84 107 190.994558(8) 22(1) ms α Pb 3/2−
Po 61(11) keV 93(3) ms α Pb 13/2+
Po 84 108 191.991340(11) 32.2(3) ms α Pb 0+
Po 2294.6(10) keV 580(100) ns IT Po 11-
Po 84 109 192.991062(16) 399(34) ms α Pb 3/2−
Po 100(6) keV 245(11) ms α Pb 13/2+
Po 84 110 193.988186(14) 392(4) ms α Pb 0+
Po 2313.4(3) keV 12.9(5) μs IT Po (10−)
Po 84 111 194.988066(6) 4.64(9) s α (94%) Pb 3/2−
β? Bi
Po 148(9) keV 1.92(2) s α Pb 13/2+
Po 84 112 195.985541(6) 5.56(12) s α (94%) Pb 0+
β? Bi
Po 2493.9(4) keV 856(17) ns IT Po 11−
Po 84 113 196.985622(11) 53.6(9) s β? Bi (3/2−)
α (44%) Pb
Po 196(12)# keV 25.8(1) s α (84%) Pb 13/2+
β? Bi
IT? Po
Po 84 114 197.983389(19) 1.760(24) min α (57%) Pb 0+
β (43%) Bi
Po 2565.92(20) keV 200(20) ns IT Po 11−
Po 2740(50)# keV 750(50) ns IT Po 12+
Po 84 115 198.983666(25) 5.48(16) min β (92.5%) Bi (3/2−)
α (7.5%) Pb
Po 312.0(28) keV 4.17(4) min β (73.5%) Bi 13/2+
α (24%) Pb
IT (2.5%) Po
Po 84 116 199.981799(15) 11.5(1) min β (88.8%) Bi 0+
α (11.1%) Pb
Po 84 117 200.982260(6) 15.3(2) min β (98.4%) Bi 3/2−
α (1.6%) Pb
Po 424.1(24) keV 8.9(2) min IT (56.2(12)%) Po 13/2+
β (41.4(7)%) Bi
α (2.4(5)%) Pb
Po 84 118 201.980758(16) 44.7(5) min β (98%) Bi 0+
α (2%) Pb
Po 2626.7(7) keV >200 ns 11−
Po 84 119 202.981420(28) 36.7(5) min β (99.89%) Bi 5/2−
α (.11%) Pb
Po 641.49(17) keV 45(2) s IT (99.96%) Po 13/2+
α (.04%) Pb
Po 2158.5(6) keV >200 ns
Po 84 120 203.980318(12) 3.53(2) h β (99.33%) Bi 0+
α (.66%) Pb
Po 84 121 204.981203(21) 1.66(2) h β (99.96%) Bi 5/2−
α (.04%) Pb
Po 143.166(17) keV 310(60) ns 1/2−
Po 880.30(4) keV 645 μs 13/2+
Po 1461.21(21) keV 57.4(9) ms IT Po 19/2−
Po 3087.2(4) keV 115(10) ns 29/2−
Po 84 122 205.980481(9) 8.8(1) d β (94.55%) Bi 0+
α (5.45%) Pb
Po 1585.85(11) keV 222(10) ns (8+)#
Po 2262.22(14) keV 1.05(6) μs (9−)#
Po 84 123 206.981593(7) 5.80(2) h β (99.97%) Bi 5/2−
α (.021%) Pb
Po 68.573(14) keV 205(10) ns 1/2−
Po 1115.073(16) keV 49(4) μs 13/2+
Po 1383.15(6) keV 2.79(8) s IT Po 19/2−
Po 84 124 207.9812457(19) 2.898(2) y α (99.99%) Pb 0+
β (.00277%) Bi
Po 84 125 208.9824304(20) 124(3) y α (99.546%) Pb 1/2−
β (.454%) Bi
Po Radium F 84 126 209.9828737(13) 138.376(2) d α Pb 0+ Trace
Po 5057.61(4) keV 263(5) ns 16+
Po Actinium C' 84 127 210.9866532(14) 516(3) ms α Pb 9/2+ Trace
Po 1462(5) keV 25.2(6) s α (99.98%) Pb (25/2+)
IT (.016%) Po
Po 2135.7(9) keV 243(21) ns (31/2−)
Po 4873.3(17) keV 2.8(7) μs (43/2+)
Po Thorium C' 84 128 211.9888680(13) 294.4(8) ns α Pb 0+ Trace
Po 2911(12) keV 45.1(6) s α (99.93%) Pb (18+)
IT (.07%) Po
Po 84 129 212.992857(3) 3.65(4) μs α Pb 9/2+ Trace
Po Radium C' 84 130 213.9952014(16) 164.3(20) μs α Pb 0+ Trace
Po Actinium A 84 131 214.9994200(27) 1.781(4) ms α (99.99%) Pb 9/2+ Trace
β (2.3×10%) At
Po Thorium A 84 132 216.0019150(24) 145(2) ms α Pb 0+ Trace
Po 84 133 217.006335(7) 1.47(5) s α (95%) Pb 5/2+# Trace
β (5%) At
Po Radium A 84 134 218.0089730(26) 3.10(1) min α (99.98%) Pb 0+ Trace
β (.02%) At
Po 84 135 219.01361(16) 10.3(1) min α (28.2%) Pb 9/2+#
β (71.8%) At
Po 84 136 220.0164(18) 40# s
※ 		β At 0+
Po 84 137 221.02123(20) 2.2(0.7) min β At 9/2+#
Po 84 138 222.024144(40) 9.1(7.2) min β At 0+
Po 84 139 223.02907(21)# 6# s
※ 		β? At 11/2+#
Po 84 140 224.03211(21)# 3# min
※ 		β? At 0+
Po 84 141 225.03712(32)# 10# s
※ 		β? At 3/2+#
Po 84 142 226.04031(43)# 1# min
※ 		β? At 0+
Po 84 143 227.04539(43)# 2# s
※ 		β? At 5/2+#
This table header & footer:
  1. ^ Po – Excited nuclear isomer.
  2. ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. ^ # – Atomic mass marked #: value and "uncertainty derived not from purely experimental data." But at least partly from trends from the Mass Surface (TMS).
  4. ^ Bold italics symbol as daughter – Daughter product is nearly stable.
  5. ^ Bold symbol as daughter – Daughter product is stable.
  6. ^ ( ) spin value – Indicates spin with weak assignment arguments.
  7. ^ # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  8. ^ Most common isotope
  9. ^ Intermediate decay product of U
  10. ^ Intermediate decay product of U
  11. ^ Intermediate decay product of Th
  12. ^ Intermediate decay product of Np
  13. ^ Theoretically capable of ββ decay to Rn

See also※

References※

  1. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  2. ^ Carvalho, F.; Fernandes, S.; Fesenko, S.; Holm, E.; Howard, B.; Martin, P.; Phaneuf, P.; Porcelli, D.; Pröhl, G.; Twining, J. (2017). The Environmental Behaviour of Polonium. Technical reports series. Vol. 484. Vienna: International Atomic Energy Agency. p. 22. ISBN 978-92-0-112116-5. ISSN 0074-1914.
  3. ^ Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
  4. ^ https://www.nndc.bnl.gov/nudat3/getdataset.jsp?nucleus=212Po&unc=NDS, NNDC Chart of Nuclides, Adopted Levels, Gammas for Po.
General references

Isotope data is sourced in:

  • Isotopic mass, spin and parity
Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.
National Nuclear Data Center. "NuDat 2.x database". Brookhaven National Laboratory.
  • Half-life
Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001.
National Nuclear Data Center. "NuDat 2.x database". Brookhaven National Laboratory.
Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.
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