Isotopes of platinum

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

[edit] 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
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+

[edit] 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.

[edit] 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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