鉑的同位素

鉑（原子量：195.084(9)）有5個穩定同位素以及1個天然放射性同位素190
Pt
。

主要的鉑同位素

同位素 衰變 豐度 半衰期 (t1/2) 方式 能量 （MeV） 產物 190Pt[1] 0.012% 4.97×1011 年 α 3.252 186Os 192Pt 0.782% 穩定，帶114粒中子 193Pt 人造 50 年 ε 0.056 193Ir 194Pt 32.864% 穩定，帶116粒中子 195Pt 33.775% 穩定，帶117粒中子 196Pt 25.211% 穩定，帶118粒中子 198Pt 7.356% 穩定，帶120粒中子
標準原子質量（英語：Standard atomic weight） (Ar, 標準)	195.084(9)[2]
←Ir（77） Au（79）→
檢視 討論 編輯

圖表

符號	Z	N	同位素質量（u） [n 1][n 2]	半衰期 [n 2][n 3]	衰變 方式[3]	衰變 產物 [n 4][n 5]	原子核 自旋[n 1]	相對豐度 （莫耳分率）[n 2]	相對豐度 的變化量 （莫耳分率）
	激發能量[n 2]
165Pt[4]	78	87		6996259999999999999♠260+260 −90 µs	α	161Os
166Pt	78	88	165.99486(54)#	6996259999999999999♠260+300 −60 µs[4]	α	162Os	0+
167Pt	78	89	166.99298(44)#	1.1(2) ms[4]	α	163Os	7/2−#
168Pt	78	90	167.98815(22)	2.00(18) ms	α	164Os	0+
					β+ （不常見）	168Ir
169Pt	78	91	168.98672(22)#	3.7(15) ms	α	165Os	3/2−#
					β+ （不常見）	169Ir
170Pt	78	92	169.982495(20)	14.0(2) ms	α (98%)	166Os	0+
					β+ (2%)	170Ir
171Pt	78	93	170.98124(9)	51(2) ms	α (99%)	167Os	3/2−#
					β+ (1%)	171Ir
172Pt	78	94	171.977347(14)	98.4(24) ms	α (77%)	168Os	0+
					β+ (23%)	172Ir
173Pt	78	95	172.97644(6)	365(7) ms	α (84%)	169Os	5/2−#
					β+ (16%)	173Ir
174Pt	78	96	173.972819(13)	0.889(17) s	α (83%)	170Os	0+
					β+ (17%)	174Ir
175Pt	78	97	174.972421(20)	2.53(6) s	α (64%)	171Os	5/2−#
					β+ (36%)	175Ir
176Pt	78	98	175.968945(15)	6.33(15) s	β+ (62%)	176Ir	0+
					α (38%)	172Os
177Pt	78	99	176.968469(16)	10.6(4) s	β+ (94.4%)	177Ir	5/2−
					α (5.6%)	173Os
177mPt	147.4(4) keV			2.2(3) µs			1/2−
178Pt	78	100	177.965649(12)	21.1(6) s	β+ (92.3%)	178Ir	0+
					α (7.7%)	174Os
179Pt	78	101	178.965363(10)	21.2(4) s	β+ (99.76%)	179Ir	1/2−
					α (0.24%)	175Os
180Pt	78	102	179.963031(12)	56(2) s	β+ (99.7%)	180Ir	0+
					α (0.3%)	176Os
181Pt	78	103	180.963097(16)	52.0(22) s	β+ (99.93%)	181Ir	1/2−
					α (0.074%)	177Os
182Pt	78	104	181.961171(17)	2.2(1) min	β+ (99.96%)	182Ir	0+
					α (.038%)	178Os
183Pt	78	105	182.961597(17)	6.5(10) min	β+ (99.99%)	183Ir	1/2−
					α (.0096%)	179Os
183m1Pt	34.50(8) keV			43(5) s	β+ (99.99%)	183Ir	(7/2)−
					α (4×10−4%)	179Os
					IT	183Pt
183m2Pt	195.68(11) keV			>150 ns			(9/2)+
184Pt	78	106	183.959922(19)	17.3(2) min	β+ (99.99%)	184Ir	0+
					α (.00169%)	180Os
184mPt	1839.4(16) keV			1.01(5) ms	IT	184Pt	8−
185Pt	78	107	184.96062(4)	70.9(24) min	β+ (99.99%)	185Ir	(9/2+)
					α (.005%)	181Os
185mPt	103.4(2) keV			33.0(8) min	β+ (98%)	185Ir	(1/2−)
					α (2%)	181Os
186Pt	78	108	185.959351(23)	2.08(5) h	β+ (99.99%)	186Ir	0+
					α (1.4×10−4%)	182Os
187Pt	78	109	186.96059(3)	2.35(3) h	β+	187Ir	3/2−
188Pt	78	110	187.959395(6)	10.2(3) d	ε (99.99%)	188Ir	0+
					α (2.6×10−5%)	184Os
189Pt	78	111	188.960834(12)	10.87(12) h	β+	189Ir	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)	4.97(16)×1011 y	α	186Os	0+	1.4(1)×10−4
191Pt	78	113	190.961677(5)	2.862(7) d	ε	191Ir	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)	觀測上穩定[n 6]			0+	0.00782(7)
193Pt	78	115	192.9629874(18)	50(6) y	ε	193Ir	1/2−
193mPt	149.78(4) keV			4.33(3) d	IT	193Pt	13/2+
194Pt	78	116	193.9626803(9)	觀測上穩定[n 7]			0+	0.32967(99)
195Pt	78	117	194.9647911(9)	觀測上穩定[n 8]			1/2−	0.33832(10)
195mPt	259.30(8) keV			4.010(5) d	IT	195Pt	13/2+
196Pt	78	118	195.9649515(9)	觀測上穩定[n 9]			0+	0.25242(41)
197Pt	78	119	196.9673402(9)	19.8915(19) h	β−	197Au	1/2−
197mPt	399.59(20) keV			95.41(18) min	IT (96.7%)	197Pt	13/2+
					β− (3.3%)	197Au
198Pt	78	120	197.967893(3)	觀測上穩定[n 10]			0+	0.07163(55)
199Pt	78	121	198.970593(3)	30.80(21) min	β−	199Au	5/2−
199mPt	424(2) keV			13.6(4) s	IT	199Pt	(13/2)+
200Pt	78	122	199.971441(22)	12.5(3) h	β−	200Au	0+
201Pt	78	123	200.97451(5)	2.5(1) min	β−	201Au	(5/2−)
202Pt	78	124	201.97574(32)#	44(15) h	β−	202Au	0+

1. 畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
2. 用括號括起來的數據代表不確定性。
3. 半衰期超過5億年的同位素以粗體表示。
4. 穩定的衰變產物以粗體表示。
5. 半衰期超過5億年的衰變產物以粗斜體表示。
6. Believed to undergo α decay to ¹⁸⁸Os with a half-life over 470×10¹⁵ years
7. Believed to undergo α decay to ¹⁹⁰Os
8. Believed to undergo α decay to ¹⁹¹Os
9. Believed to undergo α decay to ¹⁹²Os
10. Believed to undergo α decay to ¹⁹⁴Os or double β⁻ decay to ¹⁹⁸Hg with a half-life over 320×10¹² years

←	同位素列表	→
銥的同位素	鉑的同位素	金的同位素

參考文獻

1. Braun, Mihály; Georgiev, Yordan M.; Schönherr, Tommy; Wilsenach, Heinrich; Zuber, Kai. A new precision measurement of the α -decay half-life of 190 Pt. Physics Letters B (Elsevier BV). 2017, 768: 317–320. ISSN 0370-2693. doi:10.1016/j.physletb.2017.02.052.
2. Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
3. Universal Nuclide Chart. nucleonica. [2015-10-06]. （原始內容存檔於2017-02-19）. 含有內容需登入查看的頁面 (link)
4. Hilton, J.; et al. α-spectroscopy studies of the new nuclides ¹⁶⁵Pt and ¹⁷⁰Hg (PDF). Physical Review C. 2019, 100 (1): 014305 [2023-06-18]. S2CID 199118719. doi:10.1103/PhysRevC.100.014305. （原始內容存檔 (PDF)於2022-09-10）.

• 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) （頁面存檔備份，存於互聯網檔案館）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （頁面存檔備份，存於互聯網檔案館）.
• 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 （頁面存檔備份，存於互聯網檔案館）, Nuc. Phys. A 729, pp. 3-128 (2003).
  • National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （頁面存檔備份，存於互聯網檔案館） (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.