Xenon-146
Properties and data of the isotope 146Xe.
See also: List of individual Xenon isotopes (and general data sources).
General data
Name of the isotope:Xenon-146; Xe-146Symbol:146Xe or 14654XeMass number A:146 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:92Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.7037037037037 (= neutron-proton ratio)Neutron excess (N-Z):38Isotopic mass:145.948518(26) u (atomic weight of Xenon-146)Nuclide mass:145.9188966 u (calculated nuclear mass without electrons)Mass excess:-47.95517 MeVMass defect:1.271206 u (per nucleus)Nuclear binding energy:1184.12076176 MeV (per nucleus)
8.11041618 MeV (average binding energy per nucleon)Separation energy:SN = 4.533(27) MeV (first neutron)
SP = 14.3(5) MeV (first proton)Half-life:146(6) msDecay constant λ:4.7475834284928 s-1Specific activity α:1.971766631081 × 10+22 Bq g-1
532909900292.35 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.9315(245) femtometer fmYear of discovery:1989
Radioactive Decay
Half-life T½ = 146(6) ms respectively 1.46 × 10-1 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 146Cs | 100 % | 7.355(24) MeV | |
| β-, n | 145Cs | 6.9(15) % | 4.028(26) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 92) and isobaric (same nucleon number A = 146) with Xenon-146. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 92 | Isobar A = 146 |
|---|
| 53 | 145I | |
| 54 | 146Xe | 146Xe |
| 55 | 147Cs | 146Cs |
| 56 | 148Ba | 146Ba |
| 57 | 149La | 146La |
| 58 | 150Ce | 146Ce |
| 59 | 151Pr | 146Pr |
| 60 | 152Nd | 146Nd |
| 61 | 153Pm | 146Pm |
| 62 | 154Sm | 146Sm |
| 63 | 155Eu | 146Eu |
| 64 | 156Gd | 146Gd |
| 65 | 157Tb | 146Tb |
| 66 | 158Dy | 146Dy |
| 67 | 159Ho | 146Ho |
| 68 | 160Er | 146Er |
| 69 | 161Tm | 146Tm |
| 70 | 162Yb | |
| 71 | 163Lu | |
| 72 | 164Hf | |
| 73 | 165Ta | |
| 74 | 166W | |
| 75 | 167Re | |
| 76 | 168Os | |
| 77 | 169Ir | |
| 78 | 170Pt | |
| 79 | 171Au | |
| 80 | 172Hg | |
External data and identifiers
Last update: 2020-10-18
Perma link: https://www.chemlin.org/isotope/xenon-146
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