Platinum-197
Properties and data of the isotope 197Pt.
See also: list of Platinum isotopes.
General data
Name of the isotope:Platinum-197; Pt-197Symbol:197Pt or 19778PtMass number A:197 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:119Isotopic mass:196.9673431(6) u (atomic weight of Platinum-197)Nuclide mass:196.9245584 u (calculated nuclear mass without electrons)Mass excess:-30.41971 MeVMass defect:1.6741344 u (per nucleus)Nuclear binding energy:1559.44614879 MeV (per nucleus)
7.9159703 MeV (average binding energy per nucleon)Separation energy:SN = 5.84656(26) MeV (first neutron)
SP = 8.27(4) MeV (first proton)Half-life:19.8915(19) hDecay constant λ:9.679555764465 × 10-6 s-1Specific activity α:2.974063687511 × 10+16 Bq g-1
803800.99662476 Ci g-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μN) = 0.51(2)Nuclear g-factor:gl = 1.02Year of discovery:1936
Radioactive Decay
Half-life T½ = 19.8915(19) h (hours) respectively 7.16094 × 104 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 197Au | 100 % | 0.7200(5) MeV | |
Parent Nuclides
Direct parent isotope is: 197Ir.
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
Nuclear Isomer | Excitation Energy | Half-life | Spin |
---|
197mPt | 399.59(20) keV | 95.41(18) min | 13/2+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 119) and isobaric (same nucleon number A = 197) with Platinum-197. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 119 | Isobar A = 197 |
73 | 192Ta | |
74 | 193W | 197W |
75 | 194Re | 197Re |
76 | 195Os | 197Os |
77 | 196Ir | 197Ir |
78 | 197Pt | 197Pt |
79 | 198Au | 197Au |
80 | 199Hg | 197Hg |
81 | 200Tl | 197Tl |
82 | 201Pb | 197Pb |
83 | 202Bi | 197Bi |
84 | 203Po | 197Po |
85 | 204At | 197At |
86 | 205Rn | 197Rn |
87 | 206Fr | |
88 | 207Ra | |
89 | 208Ac | |
90 | 209Th | |
External data and identifiers
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/platinum-197
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