Platinum-195m
Properties and data of the isotope 195mPt.
See also: List of individual Platinum isotopes (and general data sources).
General data
Name of the isotope:Platinum-195m; Pt-195mSymbol:195mPt or 195m78PtMass number A:195 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:117Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.5 (= neutron-proton ratio)Neutron excess (N-Z):39Excitation energy:259.077(23) keVIsotopic mass:194.964792(6) u (atomic weight of Platinum-195m)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)Half-life:4.010(5) dDecay constant λ:2.000632621455 × 10-6 s-1Specific activity α:6.210356420303 × 10+15 Bq g-1
167847.47081902 Ci g-1Spin and parity:
(nuclear angular momentum)13/2+Magnetic dipole moment:μ(μN) = - 0.606(15)Quadrupole moment Q:+1.4(6) barn (100 fm2)Nuclear g-factor:gl = -0.093230769230769
Radioactive Decay
Half-life T½ = 4.010(5) d respectively 3.46464 × 105 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| Iso | 195Pt | 100 % | | |
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 |
|---|
| 195Pt | | stable | 1/2- |
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-195m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 117 | Isobar A = 195 |
|---|
| 71 | 188Lu | |
| 72 | 189Hf | |
| 73 | 190Ta | |
| 74 | 191W | 195W |
| 75 | 192Re | 195Re |
| 76 | 193Os | 195Os |
| 77 | 194Ir | 195Ir |
| 78 | 195Pt | 195Pt |
| 79 | 196Au | 195Au |
| 80 | 197Hg | 195Hg |
| 81 | 198Tl | 195Tl |
| 82 | 199Pb | 195Pb |
| 83 | 200Bi | 195Bi |
| 84 | 201Po | 195Po |
| 85 | 202At | 195At |
| 86 | 203Rn | 195Rn |
| 87 | 204Fr | |
| 88 | 205Ra | |
| 89 | 206Ac | |
| 90 | 207Th | |
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/platinum-195m
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