Isotopes of rhenium

Short description: Nuclides with atomic number of 75 but with different mass numbers

Main isotopes of Chemistry:rhenium (75Re) | Iso­tope | Decay

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| abun­dance | half-life (t1/2) | mode | pro­duct
185Re  | 37.4%  | stable
187Re  | 62.6%  | 4.12×1010 y  | β− | 187Os
Standard atomic weight Ar, standard(Re)|

* 186.207(1)[1]

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Naturally occurring rhenium (75Re) is 37.4% 185Re, which is stable (although it is predicted to decay), and 62.6% 187Re, which is unstable but has a very long half-life (4.12×1010 years).[2] Among elements with a known stable isotope, only indium and tellurium similarly occur with a stable isotope in lower abundance than the long-lived radioactive isotope.

There are 36 other unstable isotopes recognized, the longest-lived of which are 183Re with a half-life of 70 days, 184Re with a half-life of 38 days, 186Re with a half-life of 3.7186 days, 182Re with a half-life of 64.0 hours, and 189Re with a half-life of 24.3 hours. There are also numerous isomers, the longest-lived of which are 186mRe with a half-life of 200,000 years and 184mRe with a half-life of 177.25 days.[3] All others have half-lives less than a day.

## List of isotopes

Nuclide
[n 1] | Z | N | Isotopic mass (u)
[n 2][n 3] | Half-life
[n 4][n 5] | Decay
mode
[n 6] | Daughter
isotope
[n 7][n 8] | Spin and
parity
[n 9][n 5] | Physics:Natural abundance (mole fraction)

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Excitation energy[n 5] | Normal proportion  | Range of variation
159Re[4] | 75  | 84  |  | 21(4) μs  | p (92.5%)  | 158W  | (11/2−)  |  |
α (7.5%)  | 155Ta
160Re[5] | 75  | 85  | 159.98212(43)#  | 611(7) μs  | p (89%)  | 159W  | (2−)  |  |
α (11%)  | 156Ta
160mRe[6] | 185(21)# keV  | 2.8(1) μs  | IT  | 160Re  | (9+)  |  |
161Re  | 75  | 86  | 160.97759(22)  | 0.37(4) ms  | p  | 160W  | 1/2+  |  |
161mRe  | 123.8(13) keV  | 15.6(9) ms  | α  | 157Ta  | 11/2−  |  |
162Re  | 75  | 87  | 161.97600(22)#  | 107(13) ms  | α (94%)  | 158Ta  | (2−)  |  |
β+ (6%)  | 162W
162mRe  | 173(10) keV  | 77(9) ms  | α (91%)  | 158Ta  | (9+)  |  |
β+ (9%)  | 162W
163Re  | 75  | 88  | 162.972081(21)  | 390(70) ms  | β+ (68%)  | 163W  | (1/2+)  |  |
α (32%)  | 159Ta
163mRe  | 115(4) keV  | 214(5) ms  | α (66%)  | 159Ta  | (11/2−)  |  |
β+ (34%)  | 163W
164Re  | 75  | 89  | 163.97032(17)#  | 0.53(23) s  | α (58%)  | 160Ta  | high  |  |
β+ (42%)  | 164W
164mRe  | 120(120)# keV  | 530(230) ms  |  |  | (2#)−  |  |
165Re  | 75  | 90  | 164.967089(30)  | 1# s  | β+ | 165W  | 1/2+#  |  |
α  | 161Ta
165mRe  | 47(26) keV  | 2.1(3) s  | β+ (87%)  | 165W  | 11/2−#  |  |
α (13%)  | 161Ta
166Re  | 75  | 91  | 165.96581(9)#  | 2# s  | β+ | 166W  | 2−#  |  |
α  | 162Ta
167Re  | 75  | 92  | 166.96260(6)#  | 3.4(4) s  | α  | 163Ta  | 9/2−#  |  |
β+ | 167W
167mRe  | 130(40)# keV  | 5.9(3) s  | β+ (99.3%)  | 167W  | 1/2+#  |  |
α (.7%)  | 163Ta
168Re  | 75  | 93  | 167.96157(3)  | 4.4(1) s  | β+ (99.99%)  | 168W  | (5+, 6+, 7+)  |  |
α (.005%)  | 164Ta
168mRe  | non-exist  | 6.6(15) s  |  |  |  |  |
169Re  | 75  | 94  | 168.95879(3)  | 8.1(5) s  | β+ (99.99%)  | 169W  | 9/2−#  |  |
α (.005%)  | 165Ta
169mRe  | 145(29) keV  | 15.1(15) s  | β+ (99.8%)  | 169W  | 1/2+#  |  |
α (.2%)  | 164Ta
170Re  | 75  | 95  | 169.958220(28)  | 9.2(2) s  | β+ (99.99%)  | 170W  | (5+)  |  |
α (.01%)  | 166Ta
171Re  | 75  | 96  | 170.95572(3)  | 15.2(4) s  | β+ | 171W  | (9/2−)  |  |
172Re  | 75  | 97  | 171.95542(6)  | 15(3) s  | β+ | 172W  | (5)  |  |
172mRe  | 0(100)# keV  | 55(5) s  | β+ | 172W  | (2)  |  |
173Re  | 75  | 98  | 172.95324(3)  | 1.98(26) min  | β+ | 173W  | (5/2−)  |  |
174Re  | 75  | 99  | 173.95312(3)  | 2.40(4) min  | β+ | 174W  |  |  |
175Re  | 75  | 100  | 174.95138(3)  | 5.89(5) min  | β+ | 175W  | (5/2−)  |  |
176Re  | 75  | 101  | 175.95162(3)  | 5.3(3) min  | β+ | 176W  | 3+  |  |
177Re  | 75  | 102  | 176.95033(3)  | 14(1) min  | β+ | 177W  | 5/2−  |  |
177mRe  | 84.71(10) keV  | 50(10) μs  |  |  | 5/2+  |  |
178Re  | 75  | 103  | 177.95099(3)  | 13.2(2) min  | β+ | 178W  | (3+)  |  |
179Re  | 75  | 104  | 178.949988(26)  | 19.5(1) min  | β+ | 179W  | (5/2)+  |  |
179m1Re  | 65.39(9) keV  | 95(25) μs  |  |  | (5/2−)  |  |
179m2Re  | 1684.59(14)+Y keV  | >0.4 μs  |  |  | (23/2+)  |  |
180Re  | 75  | 105  | 179.950789(23)  | 2.44(6) min  | β+ | 180W | (1)−  |  |
181Re  | 75  | 106  | 180.950068(14)  | 19.9(7) h  | β+ | 181W  | 5/2+  |  |
182Re  | 75  | 107  | 181.95121(11)  | 64.0(5) h  | β+ | 182W | 7+  |  |
182m1Re  | 60(100) keV  | 12.7(2) h  | β+ | 182W | 2+  |  |
182m2Re  | 235.736(10)+X keV  | 585(21) ns  |  |  | 2−  |  |
182m3Re  | 461.3(1)+X keV  | 0.78(9) μs  |  |  | (4−)  |  |
183Re  | 75  | 108  | 182.950820(9)  | 70.0(14) d  | EC | 183W | 5/2+  |  |
183mRe  | 1907.6(3) keV  | 1.04(4) ms  | IT  | 183Re  | (25/2+)  |  |
184Re  | 75  | 109  | 183.952521(5)  | 35.4(7) d[3] | β+ | 184W | 3(−)  |  |
184mRe  | 188.01(4) keV  | 177.25(7) d[3] | IT (75.4%)  | 184Re  | 8(+)  |  |
β+ (24.6%)  | 184W
185Re  | 75  | 110  | 184.9529550(13)  | Observationally Stable[n 10] | 5/2+  | 0.3740(2)  |
185mRe  | 2124(2) keV  | 123(23) ns  |  |  | (21/2)  |  |
186Re  | 75  | 111  | 185.9549861(13)  | 3.7186(5) d  | β− (93.1%)  | 186Os | 1−  |  |
EC (6.9%)  | 186W
186mRe  | 149(7) keV  | 2.0(5)×105 y  | IT (90%)  | 186Re  | (8+)  |  |
β− (10%)  | 186Os
187Re[n 11][n 12] | 75  | 112  | 186.9557531(15)  | 4.12(2)×1010 y[n 13] | β−[n 14] | 187Os | 5/2+  | 0.6260(2)  |
188Re  | 75  | 113  | 187.9581144(15)  | 17.0040(22) h  | β− | 188Os | 1−  |  |
188mRe  | 172.069(9) keV  | 18.59(4) min  | IT  | 188Re  | (6)−  |  |
189Re  | 75  | 114  | 188.959229(9)  | 24.3(4) h  | β− | 189Os | 5/2+  |  |
190Re  | 75  | 115  | 189.96182(16)  | 3.1(3) min  | β− | 190Os | (2)−  |  |
190mRe  | 210(50) keV  | 3.2(2) h  | β− (54.4%)  | 190Os | (6−)  |  |
IT (45.6%)  | 190Re
191Re  | 75  | 116  | 190.963125(11)  | 9.8(5) min  | β− | 191Os  | (3/2+, 1/2+)  |  |
192Re  | 75  | 117  | 191.96596(21)#  | 16(1) s  | β− | 192Os |  |  |
193Re  | 75  | 118  | 192.96747(21)#  | 30# s [>300 ns]  |  |  | 5/2+#  |  |
194Re  | 75  | 119  | 193.97042(32)#  | 2# s [>300 ns]  |  |  |  |  |

1. ↑ mRh - 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 half-life - nearly stable, half-life longer than age of universe.
5. ↑ 5.0 5.1 5.2 # - Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
6. ↑ Modes of decay:  EC: | Electron capture

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IT: | Isomeric transition

p: | Proton emission
7. ↑ Bold italics symbol as daughter - Daughter product is nearly stable.
8. ↑ Bold symbol as daughter - Daughter product is stable.
9. ↑ ( ) spin value - Indicates spin with weak assignment arguments.
10. ↑ Believed to undergo α decay to 181Ta
11. ↑ primordial radionuclide
12. ↑ Used in rhenium–osmium dating
13. ↑ Can undergo Bound-state β− decay with a half-life of 32.9 years when fully ionized
14. ↑ Theorized to also undergo α decay to 183Ta

## Rhenium-186

Radiopharmaceutical.

## References

1. ↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
2. ↑ Bosch, F.; Faestermann, T.; Friese, J. et al. (1996). "Observation of bound-state β− decay of fully ionized 187Re: 187Re-187Os Cosmochronometry". Physical Review Letters 77 (26): 5190–5193. doi:10.1103/PhysRevLett.77.5190. PMID 10062738. Bibcode: 1996PhRvL..77.5190B.
3. ↑ 3.0 3.1 3.2 Janiak, Ł.; Gierlik, M.; R. Prokopowicz, G. Madejowski; Wronka, S.; Rzadkiewicz, J.; Carroll, J. J.; Chiara, C. J. (2022). "Half-life of the 188-keV isomer of 184Re". Physical Review C 106 (44303): 044303. doi:10.1103/PhysRevC.106.044303. Bibcode: 2022PhRvC.106d4303J.
4. ↑ Page, R. D.; Bianco, L.; Darby, I. G.; Uusitalo, J.; Joss, D. T.; Grahn, T.; Herzberg, R.-D.; Pakarinen, J. et al. (26 June 2007). "α decay of Re 159 and proton emission from Ta 155" (in en). Physical Review C 75 (6): 061302. doi:10.1103/PhysRevC.75.061302. ISSN 0556-2813. Bibcode: 2007PhRvC..75f1302P. https://journals.aps.org/prc/pdf/10.1103/PhysRevC.75.061302. Retrieved 12 June 2023.
5. ↑ Darby, I. G.; Page, R. D.; Joss, D. T.; Bianco, L.; Grahn, T.; Judson, D. S.; Simpson, J.; Eeckhaudt, S. et al. (20 June 2011). "Precision measurements of proton emission from the ground states of Ta 156 and Re 160" (in en). Physical Review C 83 (6): 064320. doi:10.1103/PhysRevC.83.064320. ISSN 0556-2813. Bibcode: 2011PhRvC..83f4320D. https://journals.aps.org/prc/pdf/10.1103/PhysRevC.83.064320. Retrieved 21 June 2023.
6. ↑ Darby, I. G.; Page, R. D.; Joss, D. T.; Simpson, J.; Bianco, L.; Cooper, R. J.; Eeckhaudt, S.; Ertürk, S. et al. (10 January 2011). "Decay of the high-spin isomer in 160Re: Changing single-particle structure beyond the proton drip line" (in en). Physics Letters B 695 (1): 78–81. doi:10.1016/j.physletb.2010.10.052. ISSN 0370-2693. Bibcode: 2011PhLB..695...78D.

* Isotope masses from:
* Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A 729: 3–128, doi:10.1016/j.nuclphysa.2003.11.001, Bibcode: 2003NuPhA.729....3A, https://hal.archives-ouvertes.fr/in2p3-00020241/document
* Isotopic compositions and standard atomic masses from:
* Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry 78 (11): 2051–2066. doi:10.1351/pac200678112051.
* Half-life, spin, and isomer data selected from the following sources.
* Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A 729: 3–128, doi:10.1016/j.nuclphysa.2003.11.001, Bibcode: 2003NuPhA.729....3A, https://hal.archives-ouvertes.fr/in2p3-00020241/document
* National Nuclear Data Center. "NuDat 2.x database". Brookhaven National Laboratory. http://www.nndc.bnl.gov/nudat2/.
* Lide, David R., ed (2004). "11. Table of the Isotopes". CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.

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