Platinum-171
Properties and data of the isotope 171Pt.
See also: List of individual Platinum isotopes (and general data sources).
General data
Name of the isotope:Platinum-171; Pt-171Symbol:171Pt or 17178PtMass number A:171 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:93Isotopic mass:170.98125(8) u (atomic weight of Platinum-171)Nuclide mass:170.9384653 u (calculated nuclear mass without electrons)Mass excess:-17.46551 MeVMass defect:1.434939684 u (per nucleus)Nuclear binding energy:1336.63770601 MeV (per nucleus)
7.81659477 MeV (average binding energy per nucleon)Separation energy:SN = 9.24(7) MeV (first neutron)
SP = 1.40(11) MeV (first proton)Half-life:45.5(25) msDecay constant λ:15.23400396835 s-1Specific activity α:5.39654810342 × 10+22 Bq g-1
1458526514439.5 Ci g-1Spin and parity:
(nuclear angular momentum)(7/2-)Year of discovery:1981
Radioactive Decay
Half-life T½ = 45.5(25) ms respectively 4.55 × 10-2 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| α | 167Os | 90(7) % | 6.607(3) MeV | |
| EC/β+ | 171Ir | 10(7) % | 8.94(8) MeV | |
Parent Nuclides
Direct parent isotope is: 175Hg.
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 |
|---|
| 171mPt | 412.6(10) keV | 901(9) ns | (13/2+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 93) and isobaric (same nucleon number A = 171) with Platinum-171. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 93 | Isobar A = 171 |
|---|
| 54 | 147Xe | |
| 55 | 148Cs | |
| 56 | 149Ba | |
| 57 | 150La | |
| 58 | 151Ce | |
| 59 | 152Pr | |
| 60 | 153Nd | |
| 61 | 154Pm | |
| 62 | 155Sm | |
| 63 | 156Eu | |
| 64 | 157Gd | |
| 65 | 158Tb | 171Tb |
| 66 | 159Dy | 171Dy |
| 67 | 160Ho | 171Ho |
| 68 | 161Er | 171Er |
| 69 | 162Tm | 171Tm |
| 70 | 163Yb | 171Yb |
| 71 | 164Lu | 171Lu |
| 72 | 165Hf | 171Hf |
| 73 | 166Ta | 171Ta |
| 74 | 167W | 171W |
| 75 | 168Re | 171Re |
| 76 | 169Os | 171Os |
| 77 | 170Ir | 171Ir |
| 78 | 171Pt | 171Pt |
| 79 | 172Au | 171Au |
| 80 | 173Hg | 171Hg |
External data and identifiers
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/platinum-171
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