Isotopes of platinum - AbsoluteAstronomy.com

Natural Platinum
Platinum
Platinum is a chemical element with the chemical symbol Pt and an atomic number of 78. Its name is derived from the Spanish term platina del Pinto, which is literally translated into "little silver of the Pinto River." It is a dense, malleable, ductile, precious, gray-white transition metal...

(Pt) occurs in five stable

Stable isotope

Stable isotopes are chemical isotopes that may or may not be radioactive, but if radioactive, have half-lives too long to be measured.Only 90 nuclides from the first 40 elements are energetically stable to any kind of decay save proton decay, in theory...

isotope

Isotope

Isotopes are variants of atoms of a particular chemical element, which have differing numbers of neutrons. Atoms of a particular element by definition must contain the same number of protons but may have a distinct number of neutrons which differs from atom to atom, without changing the designation...

s (¹⁹²Pt, ¹⁹⁴Pt, ¹⁹⁵Pt, ¹⁹⁶Pt, ¹⁹⁸Pt) and one very-long lived (half-life

Half-life

Half-life, abbreviated t½, is the period of time it takes for the amount of a substance undergoing decay to decrease by half. The name was originally used to describe a characteristic of unstable atoms , but it may apply to any quantity which follows a set-rate decay.The original term, dating to...

650×10⁹ years) radioisotope (¹⁹⁰Pt). There are also 31 known artificial radioisotopes, the longest-lived of which is ¹⁹³Pt with a half-life of 50 years. All other isotopes have half-lives under a year, most under a day.

Standard atomic mass: 195.084(9) u

Table

nuclide symbol	Z(p Proton The proton is a subatomic particle with the symbol or and a positive electric charge of 1 elementary charge. One or more protons are present in the nucleus of each atom, along with neutrons. The number of protons in each atom is its atomic number.... )	N(n Neutron The neutron is a subatomic hadron particle which has the symbol or , no net electric charge and a mass slightly larger than that of a proton. With the exception of hydrogen, nuclei of atoms consist of protons and neutrons, which are therefore collectively referred to as nucleons. The number of... )	isotopic mass (u)	half-lifeBold for isotopes with half-lives longer than the age of the universe (nearly stable)	decay mode(s)Abbreviations: EC: Electron capture Electron capture Electron capture is a process in which a proton-rich nuclide absorbs an inner atomic electron and simultaneously emits a neutrino... IT: Isomeric transition Isomeric transition An isomeric transition is a radioactive decay process that involves emission of a gamma ray from an atom where the nucleus is in an excited metastable state, referred to in its excited state, as a nuclear isomer....	daughter isotope(s)Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe Age of the universe The age of the universe is the time elapsed since the Big Bang posited by the most widely accepted scientific model of cosmology. The best current estimate of the age of the universe is 13.75 ± 0.13 billion years within the Lambda-CDM concordance model... )	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
nuclide symbol	excitation energy						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	α Alpha decay Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle and thereby transforms into an atom with a mass number 4 less and atomic number 2 less...	¹⁶⁴Os	0+
¹⁶⁸Pt	78	90	167.98815(22)	2.00(18) ms	β⁺ Beta decay In nuclear physics, beta decay is a type of radioactive decay in which a beta particle is emitted from an atom. There are two types of beta decay: beta minus and beta plus. In the case of beta decay that produces an electron emission, it is referred to as beta minus , while in the case of a... (rare)	¹⁶⁸Ir	0+
¹⁶⁹Pt	78	91	168.98672(22)#	3.7(15) ms	α	¹⁶⁵Os	3/2-#
¹⁶⁹Pt	78	91	168.98672(22)#	3.7(15) ms	β⁺ (rare)	¹⁶⁹Ir	3/2-#
¹⁷⁰Pt	78	92	169.982495(20)	14.0(2) ms	α (98%)	¹⁶⁶Os	0+
¹⁷⁰Pt	78	92	169.982495(20)	14.0(2) ms	β⁺ (2%)	¹⁷⁰Ir	0+
¹⁷¹Pt	78	93	170.98124(9)	51(2) ms	α (99%)	¹⁶⁷Os	3/2-#
¹⁷¹Pt	78	93	170.98124(9)	51(2) ms	β⁺ (1%)	¹⁷¹Ir	3/2-#
¹⁷²Pt	78	94	171.977347(14)	98.4(24) ms	α (77%)	¹⁶⁸Os	0+
¹⁷²Pt	78	94	171.977347(14)	98.4(24) ms	β⁺ (23%)	¹⁷²Ir	0+
¹⁷³Pt	78	95	172.97644(6)	365(7) ms	α (84%)	¹⁶⁹Os	5/2-#
¹⁷³Pt	78	95	172.97644(6)	365(7) ms	β⁺ (16%)	¹⁷³Ir	5/2-#
¹⁷⁴Pt	78	96	173.972819(13)	0.889(17) s	α (83%)	¹⁷⁰Os	0+
¹⁷⁴Pt	78	96	173.972819(13)	0.889(17) s	β⁺ (17%)	¹⁷⁴Ir	0+
¹⁷⁵Pt	78	97	174.972421(20)	2.53(6) s	α (64%)	¹⁷¹Os	5/2-#
¹⁷⁵Pt	78	97	174.972421(20)	2.53(6) s	β⁺ (36%)	¹⁷⁵Ir	5/2-#
¹⁷⁶Pt	78	98	175.968945(15)	6.33(15) s	β⁺ (62%)	¹⁷⁶Ir	0+
¹⁷⁶Pt	78	98	175.968945(15)	6.33(15) s	α (38%)	¹⁷²Os	0+
¹⁷⁷Pt	78	99	176.968469(16)	10.6(4) s	β⁺ (94.4%)	¹⁷⁷Ir	5/2-
¹⁷⁷Pt	78	99	176.968469(16)	10.6(4) s	α (5.6%)	¹⁷³Os	5/2-
^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+
¹⁷⁸Pt	78	100	177.965649(12)	21.1(6) s	α (7.7%)	¹⁷⁴Os	0+
¹⁷⁹Pt	78	101	178.965363(10)	21.2(4) s	β⁺ (99.76%)	¹⁷⁹Ir	1/2-
¹⁷⁹Pt	78	101	178.965363(10)	21.2(4) s	α (0.24%)	¹⁷⁵Os	1/2-
¹⁸⁰Pt	78	102	179.963031(12)	56(2) s	β⁺ (99.7%)	¹⁸⁰Ir	0+
¹⁸⁰Pt	78	102	179.963031(12)	56(2) s	α (0.3%)	¹⁷⁶Os	0+
¹⁸¹Pt	78	103	180.963097(16)	52.0(22) s	β⁺ (99.93%)	¹⁸¹Ir	1/2-
¹⁸¹Pt	78	103	180.963097(16)	52.0(22) s	α (0.074%)	¹⁷⁷Os	1/2-
¹⁸²Pt	78	104	181.961171(17)	2.2(1) min	β⁺ (99.96%)	¹⁸²Ir	0+
¹⁸²Pt	78	104	181.961171(17)	2.2(1) min	α (.038%)	¹⁷⁸Os	0+
¹⁸³Pt	78	105	182.961597(17)	6.5(10) min	β⁺ (99.99%)	¹⁸³Ir	1/2-
¹⁸³Pt	78	105	182.961597(17)	6.5(10) min	α (.0096%)	¹⁷⁹Os	1/2-
^183m1Pt	34.50(8) keV			43(5) s	β⁺ (99.99%)	¹⁸³Ir	(7/2)-
					α (4×10⁻⁴%)	¹⁷⁹Os
					IT Isomeric transition An isomeric transition is a radioactive decay process that involves emission of a gamma ray from an atom where the nucleus is in an excited metastable state, referred to in its excited state, as a nuclear isomer....	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+
¹⁸⁴Pt	78	106	183.959922(19)	17.3(2) min	α (.00169%)	¹⁸⁰Os	0+
^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+)
¹⁸⁵Pt	78	107	184.96062(4)	70.9(24) min	α (.005%)	¹⁸¹Os	(9/2+)
^185mPt	103.4(2) keV			33.0(8) min	β⁺ (98%)	¹⁸⁵Ir	(1/2-)
^185mPt	103.4(2) keV			33.0(8) min	α (2%)	¹⁸¹Os	(1/2-)
¹⁸⁶Pt	78	108	185.959351(23)	2.08(5) h	β⁺ (99.99%)	¹⁸⁶Ir	0+
¹⁸⁶Pt	78	108	185.959351(23)	2.08(5) h	α (1.4×10⁻⁴%)	¹⁸²Os	0+
¹⁸⁷Pt	78	109	186.96059(3)	2.35(3) h	β⁺	¹⁸⁷Ir	3/2-
¹⁸⁸Pt	78	110	187.959395(6)	10.2(3) d	EC Electron capture Electron capture is a process in which a proton-rich nuclide absorbs an inner atomic electron and simultaneously emits a neutrino... (99.99%)	¹⁸⁸Ir	0+
¹⁸⁸Pt	78	110	187.959395(6)	10.2(3) d	α (2.6×10⁻⁵%)	¹⁸⁴Os	0+
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)	6.5(3)×10¹¹ a	α	*¹⁸⁶Os*	0+	1.4(1)×10⁻⁴
¹⁹¹Pt	78	113	190.961677(5)	2.862(7) d	EC	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)	Observationally StableBelieved to undergo α decay to ¹⁸⁸Os			0+	0.00782(7)
¹⁹³Pt	78	115	192.9629874(18)	50(6) a	EC	¹⁹³Ir	1/2-
^193mPt	149.78(4) keV			4.33(3) d	IT	¹⁹³Pt	13/2+
¹⁹⁴Pt	78	116	193.9626803(9)	Observationally StableBelieved to undergo α decay to ¹⁹⁰Os			0+	0.32967(99)
¹⁹⁵Pt	78	117	194.9647911(9)	Observationally StableBelieved to undergo α decay to ¹⁹¹Os			1/2-	0.33832(10)
^195mPt	259.30(8) keV			4.010(5) d	IT	¹⁹⁵Pt	13/2+
¹⁹⁶Pt	78	118	195.9649515(9)	Observationally StableBelieved to undergo α decay to ¹⁹²Os			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+
^197mPt	399.59(20) keV			95.41(18) min	β^- (3.3%)	¹⁹⁷Au	13/2+
¹⁹⁸Pt	78	120	197.967893(3)	Observationally StableBelieved to undergo α decay to ¹⁹⁴Os or double β^- decay to ¹⁹⁸Hg with a half-life over 320×10¹² years			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+

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