Isotopes of rhenium
List of isotopes
Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe) Believed to undergo α decay to ¹⁸¹Ta primordial radionuclide Used in rhenium-osmium dating Can undergo Bound-state β− decay with a half-life of 33 years when fully ionized Theorized to also undergo α decay to ¹⁸³Ta

Isotopes of rhenium

Section Title: List of isotopes
Table Section Text: Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe) Believed to undergo α decay to ¹⁸¹Ta primordial radionuclide Used in rhenium-osmium dating Can undergo Bound-state β− decay with a half-life of 33 years when fully ionized Theorized to also undergo α decay to ¹⁸³Ta

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity	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]	p (91%)	159W	(2−)

α (9%)	156Ta

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)	38.0(5) d	β+	184W	3(−)

184mRe	188.01(4) keV	169(8) d	IT (75.4%)	184Re	8(+)

β+ (24.6%)	184W

185Re	75	110	184.9529550(13)	Observationally 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	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	75	112	186.9557531(15)	41.2(2)×109 y	β−	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]

Sentence(s)

The ¹⁸⁴ᵐRe has a half-life of 169 days.

final_sentence: The ¹⁸⁴ᵐRe has a half-life of 169 days.