Platinum-182

Properties and data of the isotope ¹⁸²Pt.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Platinum isotopes (and general data sources).

General data

Name of the isotope:Platinum-182; Pt-182Symbol:¹⁸²Pt or 18278PtMass number A:182 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:104Isotopic mass:181.961172(14) u (atomic weight of Platinum-182)Nuclide mass:181.9183873 u (calculated nuclear mass without electrons)Mass excess:-36.16805 MeVMass defect:1.55033176 u (per nucleus)Nuclear binding energy:1444.12473245 MeV (per nucleus)
7.93475128 MeV (average binding energy per nucleon)Separation energy:S_N = 9.858(19) MeV (first neutron)
S_P = 3.994(14) MeV (first proton)Half-life:2.67(12) minDecay constant λ:0.0043267614267163 s^-1Specific activity α:1.439578275084 × 10⁺¹⁹ Bq g^-1
389075209.48224 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.3969(41) femtometer fmYear of discovery:1963

Radioactive Decay

Half-life T_½ = 2.67(12) min (minutes) respectively 1.602 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁸Os	0.038(2) %	4.951(5) MeV
EC/β⁺	¹⁸²Ir	99.962(2) %	2.883(25) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸⁶Hg, ¹⁸³Hg, ¹⁸²Au.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 104) and isobaric (same nucleon number A = 182) with Platinum-182. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 104	Isobar A = 182
62	¹⁶⁶Sm
63	¹⁶⁷Eu
64	¹⁶⁸Gd
65	¹⁶⁹Tb
66	¹⁷⁰Dy
67	¹⁷¹Ho
68	¹⁷²Er
69	¹⁷³Tm
70	¹⁷⁴Yb	¹⁸²Yb
71	¹⁷⁵Lu	¹⁸²Lu
72	¹⁷⁶Hf	¹⁸²Hf
73	¹⁷⁷Ta	¹⁸²Ta
74	¹⁷⁸W	¹⁸²W
75	¹⁷⁹Re	¹⁸²Re
76	¹⁸⁰Os	¹⁸²Os
77	¹⁸¹Ir	¹⁸²Ir
78	¹⁸²Pt	¹⁸²Pt
79	¹⁸³Au	¹⁸²Au
80	¹⁸⁴Hg	¹⁸²Hg
81	¹⁸⁵Tl	¹⁸²Tl
82	¹⁸⁶Pb	¹⁸²Pb
83	¹⁸⁷Bi
84	¹⁸⁸Po
85	¹⁸⁹At