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Platinum-190

Properties and data of the isotope 190Pt.

Contents
General Data
Radioactive Decay
Parent Nuclides
Isotones und Isobares

See also: list of Platinum isotopes.

 

General data

Name of the isotope:Platinum-190; Pt-190Symbol:190Pt or 19078PtMass number A:190 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:112Isotopic mass:189.95993(4) u (atomic weight of Platinum-190)Nuclide mass:189.9171453 u (calculated nuclear mass without electrons)Mass excess:-37.32496 MeVMass defect:1.620893088 u (per nucleus)Nuclear binding energy:1509.85218611 MeV (per nucleus)
7.94659045 MeV (average binding energy per nucleon)Separation energy:SN = 8.908(10) MeV (first neutron)
SP = 6.146(13) MeV (first proton)Half-life:6.5(3) × 1011 aDecay constant λ:3.381469678413 × 10-20 s-1Specific activity α:107.74437416408 Bq g-1
2.912010112542 × 10-9 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.4108(30) femtometer fmYear of discovery:1949

 

Radioactive Decay

Half-life T½ = 6.5(3) × 1011 a respectively 2.04984 × 1019 seconds s.

Decay
mode		DaughterProbabilityDecay energyγ energy
(intensity)
α186Os100 %3.2686(6) MeV

 

Parent Nuclides

Direct parent isotope is: 190Au.

 

Occurrence

Comparison of the natural Platinum isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Platinum
Isotopic mixture		195.084 u100 %
Isotope 190Pt189.95993(4) u0.012(2) %6.5(3) × 1011 a0+
Isotope 192Pt191.96104(2) u0.782(24) %stable0+
Isotope 194Pt193.962681(6) u32.864(410) %stable0+
Isotope 195Pt194.964792(6) u33.775(240) %stable1/2-
Isotope 196Pt195.964952(6) u25.211(340) %stable0+
Isotope 198Pt197.96789(2) u7.356(130) %stable0+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 112) and isobaric (same nucleon number A = 190) with Platinum-190. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 112Isobar A = 190
70182Yb
71183Lu
72184Hf190Hf
73185Ta190Ta
74186W190W
75187Re190Re
76188Os190Os
77189Ir190Ir
78190Pt190Pt
79191Au190Au
80192Hg190Hg
81193Tl190Tl
82194Pb190Pb
83195Bi190Bi
84196Po190Po
85197At190At
86198Rn
87199Fr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 190Pt

 

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Last update: 2020-10-21

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