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Isotopes of platinum

Platinum (Pt)
Standard atomic mass: 195.084(9) u

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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)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
¹⁶⁶Pt	78	88	165.99486(54)#	300(100) µs	0+
¹⁶⁷Pt	78	89	166.99298(44)#	700(200) µs	7/2-#
¹⁶⁸Pt	78	90	167.98815(22)	2.00(18) ms	0+
¹⁶⁹Pt	78	91	168.98672(22)#	3.7(15) ms	3/2-#
¹⁷⁰Pt	78	92	169.982495(20)	14.0(2) ms	0+
¹⁷¹Pt	78	93	170.98124(9)	51(2) ms	3/2-#
¹⁷²Pt	78	94	171.977347(14)	98.4(24) ms	0+
¹⁷³Pt	78	95	172.97644(6)	365(7) ms	5/2-#
¹⁷⁴Pt	78	96	173.972819(13)	0.889(17) s	0+
¹⁷⁵Pt	78	97	174.972421(20)	2.53(6) s	5/2-#
¹⁷⁶Pt	78	98	175.968945(15)	6.33(15) s	0+
¹⁷⁷Pt	78	99	176.968469(16)	10.6(4) s	5/2-
^177mPt	147.4(4) keV			2.2(3) µs	1/2-
¹⁷⁸Pt	78	100	177.965649(12)	21.1(6) s	0+
¹⁷⁹Pt	78	101	178.965363(10)	21.2(4) s	1/2-
¹⁸⁰Pt	78	102	179.963031(12)	56(2) s	0+
¹⁸¹Pt	78	103	180.963097(16)	52.0(22) s	1/2-
¹⁸²Pt	78	104	181.961171(17)	2.2(1) min	0+
¹⁸³Pt	78	105	182.961597(17)	6.5(10) min	1/2-
^183m1Pt	34.50(8) keV			43(5) s	(7/2)-
^183m2Pt	195.68(11) keV			>150 ns	(9/2)+
¹⁸⁴Pt	78	106	183.959922(19)	17.3(2) min	0+
^184mPt	1839.4(16) keV			1.01(5) ms	8-
¹⁸⁵Pt	78	107	184.96062(4)	70.9(24) min	(9/2+)
^185mPt	103.4(2) keV			33.0(8) min	(1/2-)
¹⁸⁶Pt	78	108	185.959351(23)	2.08(5) h	0+
¹⁸⁷Pt	78	109	186.96059(3)	2.35(3) h	3/2-
¹⁸⁸Pt	78	110	187.959395(6)	10.2(3) d	0+
¹⁸⁹Pt	78	111	188.960834(12)	10.87(12) h	3/2-
^189m1Pt	172.80(6) keV			464(25) ns	9/2-
^189m2Pt	191.6(4) keV			143(5) µs	(13/2+)
¹⁹⁰Pt	78	112	189.959932(6)	6.5(3)E+11 a	0+	0.00014(1)
¹⁹¹Pt	78	113	190.961677(5)	2.862(7) d	3/2-
^191m1Pt	100.67(2) keV			>1 µs	(9/2)-
^191m2Pt	149.04(2) keV			95(5) µs	(13/2)+
¹⁹²Pt	78	114	191.9610380(27)	STABLE	0+	0.00782(7)
¹⁹³Pt	78	115	192.9629874(18)	50(6) a	1/2-
^193mPt	149.78(4) keV			4.33(3) d	13/2+
¹⁹⁴Pt	78	116	193.9626803(9)	STABLE	0+	0.32967(99)
¹⁹⁵Pt	78	117	194.9647911(9)	STABLE	1/2-	0.33832(10)
^195mPt	259.30(8) keV			4.010(5) d	13/2+
¹⁹⁶Pt	78	118	195.9649515(9)	STABLE	0+	0.25242(41)
¹⁹⁷Pt	78	119	196.9673402(9)	19.8915(19) h	1/2-
^197mPt	399.59(20) keV			95.41(18) min	13/2+
¹⁹⁸Pt	78	120	197.967893(3)	STABLE [>320E+12 a]	0+	0.07163(55)
¹⁹⁹Pt	78	121	198.970593(3)	30.80(21) min	5/2-
^199mPt	424(2) keV			13.6(4) s	(13/2)+
²⁰⁰Pt	78	122	199.971441(22)	12.5(3) h	0+
²⁰¹Pt	78	123	200.97451(5)	2.5(1) min	(5/2-)
²⁰²Pt	78	124	201.97574(32)#	44(15) h	0+

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.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_platinum". A list of authors is available in Wikipedia.