銥的同位素

**主要的銥同位素**
ε	192Os
標準原子質量 (Ar, 標準)	192.217(3)[1];
←Os（76）	Pt（78）→

銥（原子量：192.217(3)）有兩個天然同位素以及34個放射性同位素。其中，最穩定的放射性同位素是192
Ir，其半衰期有73.8天，以及其核同質異能素：192m2
Ir，其半衰期長達241年，其餘同位素半衰期都在1年以下，大部分都少於一日。

圖表

符號	Z（p ）	N（n ）	同位素質量（u）	半衰期[n 1]	衰變方式[2][n 2]	衰變產物[n 3]	原子核自旋	相對豐度（莫耳分率）	相對豐度（莫耳分率）
符號	激發能量			半衰期[n 1]	衰變方式[2][n 2]	衰變產物[n 3]	原子核自旋	相對豐度（莫耳分率）	相對豐度（莫耳分率）
¹⁶⁴Ir	77	87	163.99220(44)#	1# ms			2−#
^164mIr	270(110)# keV			94(27) µs			9+#
¹⁶⁵Ir	77	88	164.98752(23)#	<1# µs	p	¹⁶⁴Os	1/2+#
¹⁶⁵Ir	77	88	164.98752(23)#	<1# µs	α （不常見）	¹⁶¹Re	1/2+#
^165mIr	180(50)# keV			300(60) µs	p (87%)	¹⁶⁴Os	11/2−
^165mIr	180(50)# keV			300(60) µs	α (13%)	¹⁶¹Re	11/2−
¹⁶⁶Ir	77	89	165.98582(22)#	10.5(22) ms	α (93%)	¹⁶²Re	(2−)
¹⁶⁶Ir	77	89	165.98582(22)#	10.5(22) ms	p (7%)	¹⁶⁵Os	(2−)
^166mIr	172(6) keV			15.1(9) ms	α (98.2%)	¹⁶²Re	(9+)
^166mIr	172(6) keV			15.1(9) ms	p (1.8%)	¹⁶⁵Os	(9+)
¹⁶⁷Ir	77	90	166.981665(20)	35.2(20) ms	α (48%)	¹⁶³Re	1/2+
					p (32%)	¹⁶⁶Os
					β⁺ (20%)	¹⁶⁷Os
^167mIr	175.3(22) keV			30.0(6) ms	α (80%)	¹⁶³Re	11/2−
					β⁺ (20%)	¹⁶⁷Os
					p (.4%)	¹⁶⁶Os
¹⁶⁸Ir	77	91	167.97988(16)#	161(21) ms	α	¹⁶⁴Re	high
¹⁶⁸Ir	77	91	167.97988(16)#	161(21) ms	β⁺ （不常見）	¹⁶⁸Os	high
^168mIr	50(100)# keV			125(40) ms	α	¹⁶⁴Re	low
¹⁶⁹Ir	77	92	168.976295(28)	780(360) ms [0.64(+46−24) s]	α	¹⁶⁵Re	1/2+#
¹⁶⁹Ir	77	92	168.976295(28)	780(360) ms [0.64(+46−24) s]	β⁺ （不常見）	¹⁶⁹Os	1/2+#
^169mIr	154(24) keV			308(22) ms	α (72%)	¹⁶⁵Re	11/2−#
^169mIr	154(24) keV			308(22) ms	β⁺ (28%)	¹⁶⁹Os	11/2−#
¹⁷⁰Ir	77	93	169.97497(11)#	910(150) ms [0.87(+18−12) s]	β⁺ (64%)	¹⁷⁰Os	low#
¹⁷⁰Ir	77	93	169.97497(11)#	910(150) ms [0.87(+18−12) s]	α (36%)	¹⁶⁶Re	low#
^170mIr	270(70)# keV			440(60) ms			high#
¹⁷¹Ir	77	94	170.97163(4)	3.6(10) s [3.2(+13−7) s]	α (58%)	¹⁶⁷Re	1/2+#
¹⁷¹Ir	77	94	170.97163(4)	3.6(10) s [3.2(+13−7) s]	β⁺ (42%)	¹⁷¹Os	1/2+#
^171mIr	180(30)# keV			1.40(10) s			(11/2−)
¹⁷²Ir	77	95	171.97046(11)#	4.4(3) s	β⁺ (98%)	¹⁷²Os	(3+)
¹⁷²Ir	77	95	171.97046(11)#	4.4(3) s	α (2%)	¹⁶⁸Re	(3+)
^172mIr	280(100)# keV			2.0(1) s	β⁺ (77%)	¹⁷²Os	(7+)
^172mIr	280(100)# keV			2.0(1) s	α (23%)	¹⁶⁸Re	(7+)
¹⁷³Ir	77	96	172.967502(15)	9.0(8) s	β⁺ (93%)	¹⁷³Os	(3/2+,5/2+)
¹⁷³Ir	77	96	172.967502(15)	9.0(8) s	α (7%)	¹⁶⁹Re	(3/2+,5/2+)
^173mIr	253(27) keV			2.20(5) s	β⁺ (88%)	¹⁷³Os	(11/2−)
^173mIr	253(27) keV			2.20(5) s	α (12%)	¹⁶⁹Re	(11/2−)
¹⁷⁴Ir	77	97	173.966861(30)	7.9(6) s	β⁺ (99.5%)	¹⁷⁴Os	(3+)
¹⁷⁴Ir	77	97	173.966861(30)	7.9(6) s	α (.5%)	¹⁷⁰Re	(3+)
^174mIr	193(11) keV			4.9(3) s	β⁺ (99.53%)	¹⁷⁴Os	(7+)
^174mIr	193(11) keV			4.9(3) s	α (.47%)	¹⁷⁰Re	(7+)
¹⁷⁵Ir	77	98	174.964113(21)	9(2) s	β⁺ (99.15%)	¹⁷⁵Os	(5/2−)
¹⁷⁵Ir	77	98	174.964113(21)	9(2) s	α (.85%)	¹⁷¹Re	(5/2−)
¹⁷⁶Ir	77	99	175.963649(22)	8.3(6) s	β⁺ (97.9%)	¹⁷⁶Os
¹⁷⁶Ir	77	99	175.963649(22)	8.3(6) s	α (2.1%)	¹⁷²Re
¹⁷⁷Ir	77	100	176.961302(21)	30(2) s	β⁺ (99.94%)	¹⁷⁷Os	5/2−
¹⁷⁷Ir	77	100	176.961302(21)	30(2) s	α (.06%)	¹⁷³Re	5/2−
¹⁷⁸Ir	77	101	177.961082(21)	12(2) s	β⁺	¹⁷⁸Os
¹⁷⁹Ir	77	102	178.959122(12)	79(1) s	β⁺	¹⁷⁹Os	(5/2)−
¹⁸⁰Ir	77	103	179.959229(23)	1.5(1) min	β⁺	¹⁸⁰Os	(4,5)(+#)
¹⁸¹Ir	77	104	180.957625(28)	4.90(15) min	β⁺	¹⁸¹Os	(5/2)−
¹⁸²Ir	77	105	181.958076(23)	15(1) min	β⁺	¹⁸²Os	(3+)
¹⁸³Ir	77	106	182.956846(27)	57(4) min	β⁺ ( 99.95%)	¹⁸³Os	5/2−
¹⁸³Ir	77	106	182.956846(27)	57(4) min	α (.05%)	¹⁷⁹Re	5/2−
¹⁸⁴Ir	77	107	183.95748(3)	3.09(3) h	β⁺	¹⁸⁴Os	5−
^184m1Ir	225.65(11) keV			470(30) µs			3+
^184m2Ir	328.40(24) keV			350(90) ns			(7)+
¹⁸⁵Ir	77	108	184.95670(3)	14.4(1) h	β⁺	¹⁸⁵Os	5/2−
¹⁸⁶Ir	77	109	185.957946(18)	16.64(3) h	β⁺	¹⁸⁶Os	5+
^186mIr	0.8(4) keV			1.92(5) h	β⁺	¹⁸⁶Os	2−
^186mIr	0.8(4) keV			1.92(5) h	IT （不常見）	¹⁸⁶Ir	2−
¹⁸⁷Ir	77	110	186.957363(7)	10.5(3) h	β⁺	¹⁸⁷Os	3/2+
^187m1Ir	186.15(4) keV			30.3(6) ms	IT	¹⁸⁷Ir	9/2−
^187m2Ir	433.81(9) keV			152(12) ns			11/2−
¹⁸⁸Ir	77	111	187.958853(8)	41.5(5) h	β⁺	¹⁸⁸Os	1−
^188mIr	970(30) keV			4.2(2) ms	IT	¹⁸⁸Ir	7+#
^188mIr	970(30) keV			4.2(2) ms	β⁺ （不常見）	¹⁸⁸Os	7+#
¹⁸⁹Ir	77	112	188.958719(14)	13.2(1) d	ε	¹⁸⁹Os	3/2+
^189m1Ir	372.18(4) keV			13.3(3) ms	IT	¹⁸⁹Ir	11/2−
^189m2Ir	2333.3(4) keV			3.7(2) ms			(25/2)+
¹⁹⁰Ir	77	113	189.9605460(18)	11.78(10) d	β⁺	¹⁹⁰Os	4−
^190m1Ir	26.1(1) keV			1.120(3) h	IT	¹⁹⁰Ir	(1−)
^190m2Ir	36.154(25) keV			>2 µs			(4)+
^190m3Ir	376.4(1) keV			3.087(12) h			(11)−
¹⁹¹Ir	77	114	190.9605940(18)	觀測上穩定[n 4]			3/2+	0.373(2)
^191m1Ir	171.24(5) keV			4.94(3) s	IT	¹⁹¹Ir	11/2−
^191m2Ir	2120(40) keV			5.5(7) s
¹⁹²Ir	77	115	191.9626050(18)	73.827(13) d	β⁻ (95.24%)	¹⁹²Pt	4+
¹⁹²Ir	77	115	191.9626050(18)	73.827(13) d	ε (4.76%)	¹⁹²Os	4+
^192m1Ir	56.720(5) keV			1.45(5) min			1−
^192m2Ir	168.14(12) keV			241(9) y			(11−)
¹⁹³Ir	77	116	192.9629264(18)	觀測上穩定[n 5]			3/2+	0.627(2)
^193mIr	80.240(6) keV			10.53(4) d	IT	¹⁹³Ir	11/2−
¹⁹⁴Ir	77	117	193.9650784(18)	19.28(13) h	β⁻	¹⁹⁴Pt	1−
^194m1Ir	147.078(5) keV			31.85(24) ms	IT	¹⁹⁴Ir	(4+)
^194m2Ir	370(70) keV			171(11) d			(10,11)(−#)
¹⁹⁵Ir	77	118	194.9659796(18)	2.5(2) h	β⁻	¹⁹⁵Pt	3/2+
^195mIr	100(5) keV			3.8(2) h	β⁻ (95%)	¹⁹⁵Pt	11/2−
^195mIr	100(5) keV			3.8(2) h	IT (5%)	¹⁹⁵Ir	11/2−
¹⁹⁶Ir	77	119	195.96840(4)	52(1) s	β⁻	¹⁹⁶Pt	(0−)
^196mIr	210(40) keV			1.40(2) h	β⁻ (99.7%)	¹⁹⁶Pt	(10,11−)
^196mIr	210(40) keV			1.40(2) h	IT	¹⁹⁶Ir	(10,11−)
¹⁹⁷Ir	77	120	196.969653(22)	5.8(5) min	β⁻	¹⁹⁷Pt	3/2+
^197mIr	115(5) keV			8.9(3) min	β⁻ (99.75%)	¹⁹⁷Pt	11/2−
^197mIr	115(5) keV			8.9(3) min	IT (.25%)	¹⁹⁷Ir	11/2−
¹⁹⁸Ir	77	121	197.97228(21)#	8(1) s	β⁻	¹⁹⁸Pt
¹⁹⁹Ir	77	122	198.97380(4)	20# s	β⁻	¹⁹⁹Pt	3/2+#

備註：畫上#號的數據代表沒有經過實驗的証明，只是理論推測而已，而用括號括起來的代表數據不確定性。

←	同位素列表	→
鋨的同位素	銥的同位素	鉑的同位素

註釋

Bold for isotopes with half-lives longer than the age of the universe (nearly stable)
Abbreviations:
ε: Electron capture
IT: Isomeric transition
Bold for stable isotopes
Believed to undergo α decay to ¹⁸⁷Re
Believed to undergo α decay to ¹⁸⁹Re

参考文獻

Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
. nucleonica. .

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.

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[2] Bold for isotopes with half-lives longer than the age of the universe (nearly stable)

[4] Abbreviations:
ε: Electron capture
IT: Isomeric transition

[5] Bold for stable isotopes

[6] Believed to undergo α decay to ¹⁸⁷Re

[7] Believed to undergo α decay to ¹⁸⁹Re

[CIAAW2013-1] Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[3] . nucleonica. .