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Platinum-195

Properties and data of the isotope 195Pt.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Platinum isotopes.

 

General data

Name of the isotope:Platinum-195; Pt-195Symbol:195Pt or 19578PtMass number A:195 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:117Isotopic mass:194.964792(6) u (atomic weight of Platinum-195)Nuclide mass:194.9220073 u (calculated nuclear mass without electrons)Mass excess:-32.79604 MeVMass defect:1.659355668 u (per nucleus)Nuclear binding energy:1545.67984861 MeV (per nucleus)
7.92656333 MeV (average binding energy per nucleon)Separation energy:SN = 6.10510(12) MeV (first neutron)
SP = 7.5511(13) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μN) = + 0.60952(6)Charge radius:5.4270(26) femtometer fmYear of discovery:1935

 

Parent Nuclides

Direct parent isotopes are: 195Au, 195Ir.

 

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+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 195Pt

Isotope:195Pt-NMRQuantity:33.775(240) %Spin:1/2-Nuclearmagnetic moment
μ/μN:+ 0.60952(6)Gyromagnetic ratio γ:5.8383 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.21904Resonance frequency:v0 = 9.2922 at 1 TRelative Sensitivity:0.01039 (H0 = const.)
0.2182 (v0 = const.)
[related to 1H = 1.000]

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
195mPt259.077(23) keV4.010(5) d13/2+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 117) and isobaric (same nucleon number A = 195) with Platinum-195. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 117Isobar A = 195
71188Lu
72189Hf
73190Ta
74191W195W
75192Re195Re
76193Os195Os
77194Ir195Ir
78195Pt195Pt
79196Au195Au
80197Hg195Hg
81198Tl195Tl
82199Pb195Pb
83200Bi195Bi
84201Po195Po
85202At195At
86203Rn195Rn
87204Fr
88205Ra
89206Ac
90207Th

 

External data and identifiers

Adopted Levels, Gammas:NuDat 195Pt

 

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Last update: 2020-10-21

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