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Isotopes of rhenium



Naturally occurring Rhenium (Re) is 37.4% 185Re, which is stable, and 62.6% 187Re, which is unstable but has a very long half-life. There are twenty-six other unstable isotopes recognized.
Standard atomic mass: 186.207(1) u

Additional recommended knowledge

Table

nuclide
symbol
Z(p) N(n)  
isotopic mass (u)
 
half-life nuclear
spin
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
excitation energy
160Re 75 85 159.98212(43)# 860(120) µs [0.82(+15-9) ms] (2-)
161Re 75 86 160.97759(22) 0.37(4) ms 1/2+
161mRe 123.8(13) keV 15.6(9) ms 11/2-
162Re 75 87 161.97600(22)# 107(13) ms (2-)
162mRe 173(10) keV 77(9) ms (9+)
163Re 75 88 162.972081(21) 390(70) ms (1/2+)
163mRe 115(4) keV 214(5) ms (11/2-)
164Re 75 89 163.97032(17)# 0.53(23) s high
164mRe 120(120)# keV 530(230) ms (2#)-
165Re 75 90 164.967089(30) 1# s 1/2+#
165mRe 47(26) keV 2.1(3) s 11/2-#
166Re 75 91 165.96581(9)# 2# s 2-#
167Re 75 92 166.96260(6)# 3.4(4) s 9/2-#
167mRe 130(40)# keV 5.9(3) s 1/2+#
168Re 75 93 167.96157(3) 4.4(1) s (5+,6+,7+)
168mRe non-exist 6.6(15) s
169Re 75 94 168.95879(3) 8.1(5) s 9/2-#
169mRe 145(29) keV 15.1(15) s 1/2+#
170Re 75 95 169.958220(28) 9.2(2) s (5+)
171Re 75 96 170.95572(3) 15.2(4) s (9/2-)
172Re 75 97 171.95542(6) 15(3) s (5)
172mRe 0(100)# keV 55(5) s (2)
173Re 75 98 172.95324(3) 1.98(26) min (5/2-)
174Re 75 99 173.95312(3) 2.40(4) min
175Re 75 100 174.95138(3) 5.89(5) min (5/2-)
176Re 75 101 175.95162(3) 5.3(3) min 3+
177Re 75 102 176.95033(3) 14(1) min 5/2-
177mRe 84.71(10) keV 50(10) µs 5/2+
178Re 75 103 177.95099(3) 13.2(2) min (3+)
179Re 75 104 178.949988(26) 19.5(1) min (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 (1)-
181Re 75 106 180.950068(14) 19.9(7) h 5/2+
182Re 75 107 181.95121(11) 64.0(5) h 7+
182m1Re 60(100) keV 12.7(2) h 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 5/2+
183mRe 1907.6(3) keV 1.04(4) ms (25/2+)
184Re 75 109 183.952521(5) 38.0(5) d 3(-)
184mRe 188.01(4) keV 169(8) d 8(+)
185Re 75 110 184.9529550(13) STABLE 5/2+ 0.3740(2)
185mRe 2124(2) keV 123(23) ns (21/2)
186Re 75 111 185.9549861(13) 3.7186(5) d 1-
186mRe 149(7) keV 2.0(5)E+5 a (8+)
187Re 75 112 186.9557531(15) 41.2(2)E+9 a 5/2+ 0.6260(2)
188Re 75 113 187.9581144(15) 17.0040(22) h 1-
188mRe 172.069(9) keV 18.59(4) min (6)-
189Re 75 114 188.959229(9) 24.3(4) h 5/2+
190Re 75 115 189.96182(16) 3.1(3) min (2)-
190mRe 210(50) keV 3.2(2) h (6-)
191Re 75 116 190.963125(11) 9.8(5) min (3/2+,1/2+)
192Re 75 117 191.96596(21)# 16(1) s
193Re 75 118 192.96747(21)# 30# s [>300 ns] 5/2+#
194Re 75 119 193.97042(32)# 2# s [>300 ns]

Notes

  • Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
  • Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

References

  • Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
  • Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
  • Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
    • Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
    • National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
    • David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.


Isotopes of tungsten Isotopes of rhenium Isotopes of osmium
Index to isotope pages
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_rhenium". A list of authors is available in Wikipedia.
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