Isotopes of iridium

More information Nuclide, Z ...

Nuclide ^{[n 1]}	Z	N	Isotopic mass (Da)^[6] ^{[n 2]}^{[n 3]}	Half-life^[1] ^{[n 4]}	Decay mode^[1] ^{[n 5]}	Daughter isotope ^{[n 6]}^{[n 7]}	Spin and parity^[1] ^{[n 8]}^{[n 4]}	Natural abundance (mole fraction)
Nuclide ^{[n 1]}	Excitation energy^{[n 4]}			Half-life^[1] ^{[n 4]}	Decay mode^[1] ^{[n 5]}	Daughter isotope ^{[n 6]}^{[n 7]}	Spin and parity^[1] ^{[n 8]}^{[n 4]}	Normal proportion^[1]	Range of variation
¹⁶⁴Ir^{[n 9]}^[7]	77	87	163.99197(34)#	<0.5 μs	p?	¹⁶³Os	2−#
^164mIr	260(100)# keV			70(10) μs	p (96%)	¹⁶³Os	(9+)
^164mIr	260(100)# keV			70(10) μs	α (4%)	^160mRe	(9+)
¹⁶⁵Ir	77	88	165.98572(22)#	1.20+0.82 −0.74 μs^[8]	p	¹⁶⁴Os	(1/2+)
^165mIr^[7]	~255 keV			340(40) μs	p (88%)	¹⁶⁴Os	(11/2−)
^165mIr^[7]	~255 keV			340(40) μs	α (12%)	^161mRe	(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	171(6) keV			15.1(9) ms	α (98.2%)	¹⁶²Re	(9)+
^166mIr	171(6) keV			15.1(9) ms	p (1.8%)	¹⁶⁵Os	(9)+
¹⁶⁷Ir	77	90	166.981672(20)	29.3(6) ms	α (43.5%)	¹⁶³Re	1/2+
					p (38.6%)	¹⁶⁶Os
					β⁺ (17.9%)	¹⁶⁷Os
^167mIr	175.5(21) keV			28.5(5) ms	α (89%)	¹⁶³Re	11/2−
					β⁺ (11%)	¹⁶⁷Os
					p (0.41%)	¹⁶⁶Os
¹⁶⁸Ir	77	91	167.979961(59)	230(50) ms	α	¹⁶⁴Re	(2)-
^168mIr^{[n 10]}	40(250) keV			163(16) ms	α (77%)	¹⁶⁴Re	(9,10)+
					β⁺?	¹⁶⁸Os
					β⁺, p?	¹⁶⁷Re
¹⁶⁹Ir	77	92	168.976282(25)	353(4) ms	α (53%)	¹⁶⁵Re	(1/2+)
¹⁶⁹Ir	77	92	168.976282(25)	353(4) ms	β⁺ (47%)	¹⁶⁹Os	(1/2+)
^169mIr	153(22) keV			280(1) ms	α (79%)	¹⁶⁵Re	(11/2−)
					β⁺?	¹⁶⁹Os
					p?	¹⁶⁸Os
¹⁷⁰Ir	77	93	169.97511(11)#	910(150) ms	β⁺ (94.8%)	¹⁷⁰Os	(3−)
¹⁷⁰Ir	77	93	169.97511(11)#	910(150) ms	α (5.2%)	¹⁶⁶Re	(3−)
^170mIr^{[n 10]}	40(50)# keV			811(18) ms	α (38%)	¹⁶⁶Re	(8+)
					β⁺?	¹⁷⁰Os
					IT?	¹⁷⁰Ir
¹⁷¹Ir	77	94	170.971646(41)	3.1(3) s	β⁺ (85%)	¹⁷¹Os	1/2+
¹⁷¹Ir	77	94	170.971646(41)	3.1(3) s	α (15%)	¹⁶⁷Re	1/2+
^171mIr	164(11)# keV			1.47(6) s	α (54%)	¹⁶⁷Re	(11/2−)
					β⁺?	¹⁷¹Os
					p?	¹⁷⁰Os
¹⁷²Ir	77	95	171.970607(35)	4.4(3) s	β⁺ (~98%)	¹⁷²Os	(3−,4−)
¹⁷²Ir	77	95	171.970607(35)	4.4(3) s	α (~2%)	¹⁶⁸Re	(3−,4−)
^172mIr	139(10) keV			2.19(7) s	β⁺ (90.5%)	¹⁷²Os	(7+)
^172mIr	139(10) keV			2.19(7) s	α (9.5%)	¹⁶⁸Re	(7+)
¹⁷³Ir	77	96	172.967505(11)	9.0(8) s	β⁺ (96.5%)	¹⁷³Os	(1/2+,3/2+)
¹⁷³Ir	77	96	172.967505(11)	9.0(8) s	α (3.5%)	¹⁶⁹Re	(1/2+,3/2+)
^173mIr	226(9) keV			2.20(5) s	β⁺ (88%)	¹⁷³Os	11/2−
^173mIr	226(9) keV			2.20(5) s	α (12%)	¹⁶⁹Re	11/2−
¹⁷⁴Ir	77	97	173.966950(12)	7.9(6) s	β⁺ (99.5%)	¹⁷⁴Os	(2+,3−)
¹⁷⁴Ir	77	97	173.966950(12)	7.9(6) s	α (0.5%)	¹⁷⁰Re	(2+,3−)
^174mIr	124(16) keV			4.9(3) s	β⁺ (97.5%)	¹⁷⁴Os	(6,7,8,9)
^174mIr	124(16) keV			4.9(3) s	α (2.5%)	¹⁷⁰Re	(6,7,8,9)
¹⁷⁵Ir	77	98	174.964150(13)	9(2) s	β⁺ (99.15%)	¹⁷⁵Os	(1/2+)
¹⁷⁵Ir	77	98	174.964150(13)	9(2) s	α (0.85%)	¹⁷¹Re	(1/2+)
^175m1Ir	50(40)# keV			33(4) s	β⁺	¹⁷⁵Os	9/2−#
^175m2Ir	97.4(7) keV			6.58(15) μs	IT	¹⁷⁵Ir	(5/2−)
¹⁷⁶Ir	77	99	175.9636263(87)	8.7(5) s	β⁺ (96.9%)	¹⁷⁶Os	(3+)
¹⁷⁶Ir	77	99	175.9636263(87)	8.7(5) s	α (3.1%)	¹⁷²Re	(3+)
¹⁷⁷Ir	77	100	176.961302(21)	29.8(17) s	β⁺ (99.94%)	¹⁷⁷Os	5/2−
¹⁷⁷Ir	77	100	176.961302(21)	29.8(17) s	α (0.06%)	¹⁷³Re	5/2−
^177mIr	180.9(4) keV			>100 ns	IT	¹⁷⁷Ir	(5/2+)
¹⁷⁸Ir	77	101	177.961079(20)	12(2) s	β⁺	¹⁷⁸Os	3+#
¹⁷⁹Ir	77	102	178.959118(10)	79(1) s	β⁺	¹⁷⁹Os	(5/2)−
¹⁸⁰Ir	77	103	179.959229(23)	1.5(1) min	β⁺	¹⁸⁰Os	(5+)
¹⁸¹Ir	77	104	180.9576347(56)	4.90(15) min	β⁺	¹⁸¹Os	5/2−
^181m1Ir	289.33(13) keV			298 ns	IT	¹⁸¹Ir	5/2+
^181m2Ir	366.30(22) keV			126(6) ns	IT	¹⁸¹Ir	9/2−
¹⁸²Ir	77	105	181.958076(23)	15.0(10) min	β⁺	¹⁸²Os	3+
^182m1Ir	71.02(17) keV			170(40) ns	IT	¹⁸²Ir	(5)+
^182m2Ir	176.4(3) keV			130(50) ns	IT	¹⁸²Ir	(6−)
¹⁸³Ir	77	106	182.956841(26)	58(5) min	β⁺	¹⁸³Os	5/2−
¹⁸⁴Ir	77	107	183.957476(30)	3.09(3) h	β⁺	¹⁸⁴Os	5−
^184m1Ir	225.65(11) keV			470(30) μs	IT	¹⁸⁴Ir	3+
^184m2Ir	328.40(24) keV			350(90) ns	IT	¹⁸⁴Ir	7+
¹⁸⁵Ir	77	108	184.956698(30)	14.4(1) h	β⁺	¹⁸⁵Os	5/2−
^185mIr	2197(23) keV			120(20) ns	IT	¹⁸⁵Ir	(23/2,25/2)#
¹⁸⁶Ir	77	109	185.957947(18)	16.64(3) h	β⁺	¹⁸⁶Os	5+
^186mIr	0.8(4) keV			1.92(5) h	β⁺ (~75%)	¹⁸⁶Os	2−
^186mIr	0.8(4) keV			1.92(5) h	IT (~25%)	¹⁸⁶Ir	2−
¹⁸⁷Ir	77	110	186.957542(30)	10.5(3) h	β⁺	¹⁸⁷Os	3/2+
^187m1Ir	186.16(4) keV			30.3(6) ms	IT	¹⁸⁷Ir	9/2−
^187m2Ir	433.75(6) keV			152(12) ns	IT	¹⁸⁷Ir	11/2−
^187m3Ir	2487.7(4) keV			1.8(5) μs	IT	¹⁸⁷Ir	29/2−
¹⁸⁸Ir	77	111	187.958835(10)	41.5(5) h	β⁺	¹⁸⁸Os	1−
^188mIr	964(23) keV			4.15(15) ms	IT	¹⁸⁸Ir	11−#
¹⁸⁹Ir	77	112	188.958723(14)	13.2(1) d	EC	¹⁸⁹Os	3/2+
^189m1Ir	372.17(4) keV			13.3(3) ms	IT	¹⁸⁹Ir	11/2−
^189m2Ir	2332.8(3) keV			3.7(2) ms	IT	¹⁸⁹Ir	25/2+
¹⁹⁰Ir	77	113	189.9605434(15)	11.7511(20) d^[9]	EC	¹⁹⁰Os	4−
¹⁹⁰Ir	77	113	189.9605434(15)	11.7511(20) d^[9]	β⁺ (<0.002%)^[9]	¹⁹⁰Os	4−
^190m1Ir	26.1(1) keV			1.120(3) h	IT	¹⁹⁰Ir	1−
^190m2Ir	36.154(25) keV			>2 μs	IT	¹⁹⁰Ir	4+
^190m3Ir	376.4(1) keV			3.087(12) h	EC (91.4%)	¹⁹⁰Os	11−
^190m3Ir	376.4(1) keV			3.087(12) h	IT (8.6%)	¹⁹⁰Ir	11−
¹⁹¹Ir	77	114	190.9605915(14)	Observationally Stable^{[n 11]}			3/2+	0.373(2)
^191m1Ir	171.29(4) keV			4.899(23) s	IT	¹⁹¹Ir	11/2−
^191m2Ir	2101.0(9) keV			5.7(4) s	IT	¹⁹¹Ir	31/2(+)
¹⁹²Ir	77	115	191.9626024(14)	73.820(14) d	β⁻ (95.24%)	¹⁹²Pt	4+
¹⁹²Ir	77	115	191.9626024(14)	73.820(14) d	EC (4.76%)	¹⁹²Os	4+
^192m1Ir	56.720(5) keV			1.45(5) min	IT (99.98%)	¹⁹²Ir	1−
^192m1Ir	56.720(5) keV			1.45(5) min	β⁻ (0.0175%)	¹⁹²Pt	1−
^192m2Ir	168.14(12) keV			241(9) y	IT	¹⁹²Ir	(11−)
¹⁹³Ir	77	116	192.9629238(14)	Observationally Stable^{[n 12]}			3/2+	0.627(2)
^193m1Ir	80.238(6) keV			10.53(4) d	IT	¹⁹³Ir	11/2−
^193m2Ir	2278.9(5) keV			124.8(21) μs	IT	¹⁹³Ir	31/2+
¹⁹⁴Ir	77	117	193.9650757(14)	19.35(7) h	β⁻	¹⁹⁴Pt	1−
^194m1Ir	147.072(2) keV			31.85(24) ms	IT	¹⁹⁴Ir	4+
^194m2Ir	370(70) keV			171(11) d	β⁻	¹⁹⁴Pt	(11−)
¹⁹⁵Ir	77	118	194.9659769(14)	2.29(17) h	β⁻	¹⁹⁵Pt	3/2+
^195m1Ir	100(5) keV			3.74(7) h	β⁻	¹⁹⁵Pt	11/2−
^195m2Ir	2354(6) keV			4.4(6) μs	IT	¹⁹⁵Ir	(27/2+)
¹⁹⁶Ir	77	119	195.968400(41)	52.0(11) s	β⁻	¹⁹⁶Pt	(1,2−)
^196mIr	210(40) keV			1.40(2) h	β⁻	¹⁹⁶Pt	11−#
¹⁹⁷Ir	77	120	196.969657(22)	5.8(5) min	β⁻	¹⁹⁷Pt	3/2+
^197m1Ir	115(5) keV			8.9(3) min	β⁻	¹⁹⁷Pt	11/2−
^197m2Ir	1700(500)# keV			30(8) μs	IT	¹⁹⁷Ir
^197m3Ir	2800(500)# keV			15(9) μs	IT	¹⁹⁷Ir
¹⁹⁸Ir	77	121	197.97240(22)#	8.7(4) s	β⁻	¹⁹⁸Pt	1−
¹⁹⁹Ir	77	122	198.973807(44)	7(5) s	β⁻	¹⁹⁹Pt	3/2+#
²⁰⁰Ir	77	123	199.97684(21)#	43(6) s	β⁻	²⁰⁰Pt	(2−, 3−)
²⁰¹Ir	77	124	200.97870(22)#	21(5) s	β⁻	²⁰¹Pt	(3/2+)
²⁰²Ir	77	125	201.98214(32)#	11(3) s	β⁻	²⁰²Pt	(2−)
^202mIr	2600(300)# keV			3.4(6) μs	IT	²⁰²Ir
²⁰³Ir	77	126	202.98457(43)#	7# s [>300 ns]			3/2+#
^203mIr	2140(50)# keV			798(350) ns	IT	²⁰³Ir
²⁰⁴Ir	77	127	203.98973(43)#	2# s [>300 ns]			3/2+#
²⁰⁵Ir	77	128	204.99399(54)#	1# s [>300 ns]			3/2+#
This table header & footer: view

[n 1]
^mIr – Excited nuclear isomer.
[n 2]
( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
[n 3]
# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
[n 4]
# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
[n 5]
Modes of decay:

α: Alpha decay

β⁺: Positron emission

EC: Electron capture

β⁻: Beta decay

IT: Isomeric transition

p: Proton emission
[n 6]
Bold italics symbol as daughter – Daughter product is nearly stable.
[n 7]
Bold symbol as daughter – Daughter product is stable.
[n 8]
( ) spin value – Indicates spin with weak assignment arguments.
[n 9]
Discovery of this isotope is unconfirmed
[N 10]
Order of ground state and isomer is uncertain.
[N 11]
Believed to undergo α decay to ¹⁸⁷Re^[10]^[11]
[N 12]
Believed to undergo α decay to ¹⁸⁹Re^[10]

Isotopes of iridium

List of isotopes

Iridium-192

See also

References

External links

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