Isotopes of rhenium

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 (4.16×1010 years). 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 35.4 days, 186Re with a half-life of 3.7185 days, 182Re with a half-life of 64.2 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. All others have half-lives less than a day.

List of isotopes

|-id=Rhenium-159 | 159Re | style="text-align:right" | 75 | style="text-align:right" | 84 | 158.98411(33)# | style="text-align:center" | 2006 | 40# μs

| 1/2+#

|-id=Rhenium-159m | rowspan=2 style="text-indent:1em" | 159mRe | rowspan=2 colspan="3" style="text-indent:2em" | 210(50)# keV | rowspan=2 style="text-align:center" | 2006 | rowspan=2|20(4) μs | p (92.5%) | 158W | rowspan=2|(11/2−) | rowspan=2| | rowspan=2| |- | α (7.5%) | 155Ta |-id=Rhenium-160 | rowspan=2|160Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 85 | rowspan=2|159.98188(32)# | rowspan=2 style="text-align:center" | 1992 | rowspan=2|611(7) μs | p (89%) | 159W | rowspan=2|(4−) | rowspan=2| | rowspan=2| |- | α (11%) | 156Ta |-id=Rhenium-160m | style="text-indent:1em" | 160mRe | colspan="3" style="text-indent:2em" | 177(15) keV | style="text-align:center" | 2011 | 2.8(1) μs | IT | 160Re | (9+)

|-id=Rhenium-161 | 161Re | style="text-align:right" | 75 | style="text-align:right" | 86 | 160.97762(16) | style="text-align:center" | 1979 | 440(1) μs | p | 160W | 1/2+

|-id=Rhenium-161m | rowspan=2 style="text-indent:1em" | 161mRe | rowspan=2 colspan="3" style="text-indent:2em" | 123.7(13) keV | rowspan=2 style="text-align:center" | 1997 | rowspan=2|14.7(3) ms | α (93.0%) | 157Ta | rowspan=2|11/2− | rowspan=2| | rowspan=2| |- | p (7.0%) | 160W |-id=Rhenium-162 | rowspan=2|162Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 87 | rowspan=2|161.97590(22)# | rowspan=2 style="text-align:center" | 1979 | rowspan=2|107(13) ms | α (94%) | 158Ta | rowspan=2|(2)− | rowspan=2| | rowspan=2| |- | β+ (6%) | 162W |-id=Rhenium-162m | rowspan=2 style="text-indent:1em" | 162mRe | rowspan=2 colspan="3" style="text-indent:2em" | 175(9) keV | rowspan=2 style="text-align:center" | 1997 | rowspan=2|77(9) ms | α (91%) | 158Ta | rowspan=2|(9)+ | rowspan=2| | rowspan=2| |- | β+ (9%) | 162W |-id=Rhenium-163 | rowspan=2|163Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 88 | rowspan=2|162.972085(20) | rowspan=2 style="text-align:center" | 1979 | rowspan=2|390(70) ms | β+ (68%) | 163W | rowspan=2|1/2+ | rowspan=2| | rowspan=2| |- | α (32%) | 159Ta |-id=Rhenium-163m | rowspan=2 style="text-indent:1em" | 163mRe | rowspan=2 colspan="3" style="text-indent:2em" | 120(5) keV | rowspan=2 style="text-align:center" | 1997 | rowspan=2|214(5) ms | α (66%) | 159Ta | rowspan=2|11/2− | rowspan=2| | rowspan=2| |- | β+ (34%) | 163W |-id=Rhenium-164 | rowspan=2|164Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 89 | rowspan=2|163.970507(59) | rowspan=2 style="text-align:center" | 1979 | rowspan=2|719(89) ms | α (?%) | 160Ta | rowspan=2|(2)− | rowspan=2| | rowspan=2| |- | β+ (?%) | 164W |-id=Rhenium-164m | rowspan=2 style="text-indent:1em" | 164mReOrder of ground state and isomer is uncertain. | rowspan=2 colspan="3" style="text-indent:2em" | −50(250) keV | rowspan=2 style="text-align:center" | 2009 | rowspan=2|890(130) ms | β+ (97%) | 164W | rowspan=2|(9,10)+ | rowspan=2| | rowspan=2| |- | α (3%) | 160Ta |-id=Rhenium-165 | rowspan=2|165Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 90 | rowspan=2|164.967086(25) | rowspan=2 style="text-align:center" | 1981 | rowspan=2|1.6(6) s | β+ (86%) | 165W | rowspan=2|(1/2+) | rowspan=2| | rowspan=2| |- | α (14%) | 161Ta |-id=Rhenium-165m | rowspan=2 style="text-indent:1em" | 165mRe | rowspan=2 colspan="3" style="text-indent:2em" | 28(22) keV | rowspan=2 style="text-align:center" | 2012 | rowspan=2|1.74(6) s | β+ (87%) | 165W | rowspan=2|(11/2−) | rowspan=2| | rowspan=2| |- | α (13%) | 161Ta |-id=Rhenium-166 | rowspan=2|166Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 91 | rowspan=2|165.965821(95) | rowspan=2 style="text-align:center" | 1978 | rowspan=2|2.25(21) s | β+ | 166W | rowspan=2|(7+) | rowspan=2| | rowspan=2| |- | α | 162Ta |-id=Rhenium-167 | rowspan=2|167Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 92 | rowspan=2|166.962604(43)# | rowspan=2 style="text-align:center" | 1992 | rowspan=2|3.4(4) s | α (?%) | 163Ta | rowspan=2|9/2− | rowspan=2| | rowspan=2| |- | β+ (?%) | 167W |-id=Rhenium-167m | rowspan=2 style="text-indent:1em" | 167mRe | rowspan=2 colspan="3" style="text-indent:2em" | 131(13)# keV | rowspan=2 style="text-align:center" | 1992 | rowspan=2|5.9(3) s | β+ (?%) | 167W | rowspan=2|1/2+ | rowspan=2| | rowspan=2| |- | α (?%) | 163Ta |-id=Rhenium-168 | rowspan=2|168Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 93 | rowspan=2|167.961573(33) | rowspan=2 style="text-align:center" | 1992 | rowspan=2|4.4(1) s | β+ | 168W | rowspan=2|(7+) | rowspan=2| | rowspan=2| |- | α (0.005%) | 164Ta |-id=Rhenium-169 | rowspan=2|169Re | rowspan=2 style="text-align:right" | 75 | rowspan=2 style="text-align:right" | 94 | rowspan=2|168.958766(12) | rowspan=2 style="text-align:center" | 1978 | rowspan=2|8.1(5) s | β+ | 169W | rowspan=2|(9/2−) | rowspan=2| | rowspan=2| |- | α (0.005%) | 165Ta |-id=Rhenium-169m | rowspan=2 style="text-indent:1em" | 169mRe | rowspan=2 colspan="3" style="text-indent:2em" | 175(13) keV | rowspan=2 style="text-align:center" | 1984 | rowspan=2|15.1(15) s | β+ (?%) | 169W | rowspan=2|(1/2+,3/2+) | rowspan=2| | rowspan=2| |- | α (?%) | 165Ta |-id=Rhenium-170 | 170Re | style="text-align:right" | 75 | style="text-align:right" | 95 | 169.958235(12) | style="text-align:center" | 1974 | >1# s | β+ | 170W | (8−,9−)#

|-id=Rhenium-170m1 | style="text-indent:1em" | 170m1Re | colspan="3" style="text-indent:2em" | 73(17) keV | style="text-align:center" | (2020)Not clear that this state is a different state from the ground state; not included in the discovery database. | 9.2(2) s | β+ | 170W | (5+)

|-id=Rhenium-170m2 | style="text-indent:1em" | 170m2Re | colspan="3" style="text-indent:2em" | 210.1(1) keV | style="text-align:center" | (2019)Only reported in a thesis and not a refereed journal; not included in the discovery database. | 130(10) ns | IT | 170Re | (6,7,8,9)

|-id=Rhenium-171 | 171Re | style="text-align:right" | 75 | style="text-align:right" | 96 | 170.955716(30) | style="text-align:center" | 1987 | 15.2(4) s | β+ | 171W | (9/2−)

|-id=Rhenium-172 | 172Re | style="text-align:right" | 75 | style="text-align:right" | 97 | 171.955376(38) | style="text-align:center" | 1972 | 55(5) s | β+ | 172W | (2+)

|-id=Rhenium-172m | style="text-indent:1em" | 172mRe | colspan="3" style="text-indent:2em" | 110(50)# keV | style="text-align:center" | 1977 | 15(3) s | β+ | 172W | (7+)

|-id=Rhenium-173 | 173Re | style="text-align:right" | 75 | style="text-align:right" | 98 | 172.953243(30) | style="text-align:center" | 1986 | 2.0(3) min | β+ | 173W | (5/2−)

|-id=Rhenium-174 | 174Re | style="text-align:right" | 75 | style="text-align:right" | 99 | 173.953115(30) | style="text-align:center" | 1972 | 2.40(4) min | β+ | 174W | 3+#

| 7+#

|-id=Rhenium-175 | 175Re | style="text-align:right" | 75 | style="text-align:right" | 100 | 174.951381(30) | style="text-align:center" | 1967 | 5.89(5) min | β+ | 175W | 5/2−#

|-id=Rhenium-176 | 176Re | style="text-align:right" | 75 | style="text-align:right" | 101 | 175.951623(30) | style="text-align:center" | 1967 | 5.3(3) min | β+ | 176W | (3+)

|-id=Rhenium-177 | 177Re | style="text-align:right" | 75 | style="text-align:right" | 102 | 176.950328(30) | style="text-align:center" | 1957 | 14(1) min | β+ | 177W | 5/2−

|-id=Rhenium-177m | style="text-indent:1em" | 177mRe | colspan="3" style="text-indent:2em" | 84.70(10) keV | style="text-align:center" | 1972 | 50(10) μs | IT | 177Re | 5/2+

|-id=Rhenium-178 | 178Re | style="text-align:right" | 75 | style="text-align:right" | 103 | 177.950989(30) | style="text-align:center" | 1957 | 13.2(2) min | β+ | 178W | (3+)

|-id=Rhenium-179 | 179Re | style="text-align:right" | 75 | style="text-align:right" | 104 | 178.949990(26) | style="text-align:center" | 1960 | 19.5(1) min | β+ | 179W | 5/2+

|-id=Rhenium-179m1 | style="text-indent:1em" | 179m1Re | colspan="3" style="text-indent:2em" | 65.35(9) keV | style="text-align:center" | 1972 | 95(25) μs | IT | 179Re | (5/2−)

|-id=Rhenium-179m2 | style="text-indent:1em" | 179m2Re | colspan="3" style="text-indent:2em" | 1822(50)# keV | style="text-align:center" | 1989 | 408(12) ns | IT | 179Re | (23/2+)

|-id=Rhenium-179m3 | style="text-indent:1em" | 179m3Re | colspan="3" style="text-indent:2em" | 5408.0(5) keV | style="text-align:center" | 2002 | 466(15) μs | IT | 179Re | (47/2+,49/2+)

|-id=Rhenium-180 | 180Re | style="text-align:right" | 75 | style="text-align:right" | 105 | 179.950792(23) | style="text-align:center" | 1955 | 2.46(3) min | β+ | 180W | (1)−

|-id=Rhenium-180m1 | style="text-indent:1em" | 180m1Re | colspan="3" style="text-indent:2em" | 90(30)# keV | style="text-align:center" | (2005) Half-life shorter than 100ns, not included in discovery database | >1# μs | IT | 180Re | (4+,5+)

|-id=Rhenium-180m2 | style="text-indent:1em" | 180m2Re | colspan="3" style="text-indent:2em" | 3561(30)# keV | style="text-align:center" | 2005 | 9.0(7) μs | IT | 180Re | 21−

|-id=Rhenium-181 | 181Re | style="text-align:right" | 75 | style="text-align:right" | 106 | 180.950062(13) | style="text-align:center" | 1957 | 19.9(7) h | β+ | 181W | 5/2+

|-id=Rhenium-181m1 | style="text-indent:1em" | 181m1Re | colspan="3" style="text-indent:2em" | 262.91(11) keV | style="text-align:center" | 1967 | 156.7(19) ns | IT | 181Re | 9/2−

|-id=Rhenium-181m2 | style="text-indent:1em" | 181m2Re | colspan="3" style="text-indent:2em" | 1656.37(14) keV | style="text-align:center" | 1974 | 250(10) ns | IT | 181Re | 21/2−

|-id=Rhenium-181m3 | style="text-indent:1em" | 181m3Re | colspan="3" style="text-indent:2em" | 1880.57(16) keV | style="text-align:center" | 1969 | 11.5(9) μs | IT | 181Re | 25/2+

|-id=Rhenium-181m4 | style="text-indent:1em" | 181m4Re | colspan="3" style="text-indent:2em" | 3869.40(18) keV | style="text-align:center" | 2000 | 1.2(2) μs | IT | 181Re | (35/2−)

|-id=Rhenium-182 | 182Re | style="text-align:right" | 75 | style="text-align:right" | 107 | 181.95121(11) | style="text-align:center" | 1950 | 64.2(5) h | β+ | 182W | 7+

|-id=Rhenium-182m1 | style="text-indent:1em" | 182m1Re | colspan="3" style="text-indent:2em" | 60(100) keV | style="text-align:center" | 1950 | 14.14(45) h | β+ | 182W | 2+

|-id=Rhenium-182m2 | style="text-indent:1em" | 182m2Re | colspan="3" style="text-indent:2em" | 296(100) keV | style="text-align:center" | 1969 | 585(30) ns | IT | 182Re | (2)−

|-id=Rhenium-182m3 | style="text-indent:1em" | 182m3Re | colspan="3" style="text-indent:2em" | 521(100) keV | style="text-align:center" | 1984 | 0.78(9) μs | IT | 182Re | (4−)

|-id=Rhenium-183 | 183Re | style="text-align:right" | 75 | style="text-align:right" | 108 | 182.9508213(86) | style="text-align:center" | 1950 | 70.0(14) d | EC | 183W | 5/2+

|-id=Rhenium-183m

Isotopes of rhenium

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