Xenon-137
Properties and data of the isotope 137Xe.
See also: List of individual Xenon isotopes (and general data sources).
General data
Name of the isotope:Xenon-137; Xe-137Symbol:137Xe or 13754XeMass number A:137 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:83Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.537037037037 (= neutron-proton ratio)Neutron excess (N-Z):29Isotopic mass:136.91155777(11) u (atomic weight of Xenon-137)Nuclide mass:136.8819364 u (calculated nuclear mass without electrons)Mass excess:-82.38341 MeVMass defect:1.230181986 u (per nucleus)Nuclear binding energy:1145.90713887 MeV (per nucleus)
8.36428569 MeV (average binding energy per nucleon)Separation energy:SN = 4.02556(10) MeV (first neutron)
SP = 10.127(14) MeV (first proton)Half-life:3.818(13) minDecay constant λ:0.0030257865398985 s-1Specific activity α:1.339831820247 × 10+19 Bq g-1
362116708.17505 Ci g-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μN) = - 0.9704(10)Quadrupole moment Q:0.490(17) barn (100 fm2)Nuclear g-factor:gl = -0.27725714285714Charge radius:4.8094(49) femtometer fmYear of discovery:1943
Radioactive Decay
Half-life T½ = 3.818(13) min (minutes) respectively 2.2908 × 102 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 137Cs | 100 % | 4.41624(3) MeV | |
Parent Nuclides
Direct parent isotopes are: 137I, 138I, 248Cm.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 137) with Xenon-137. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 83 | Isobar A = 137 |
|---|
| 46 | 129Pd | |
| 47 | 130Ag | |
| 48 | 131Cd | |
| 49 | 132In | 137In |
| 50 | 133Sn | 137Sn |
| 51 | 134Sb | 137Sb |
| 52 | 135Te | 137Te |
| 53 | 136I | 137I |
| 54 | 137Xe | 137Xe |
| 55 | 138Cs | 137Cs |
| 56 | 139Ba | 137Ba |
| 57 | 140La | 137La |
| 58 | 141Ce | 137Ce |
| 59 | 142Pr | 137Pr |
| 60 | 143Nd | 137Nd |
| 61 | 144Pm | 137Pm |
| 62 | 145Sm | 137Sm |
| 63 | 146Eu | 137Eu |
| 64 | 147Gd | 137Gd |
| 65 | 148Tb | 137Tb |
| 66 | 149Dy | |
| 67 | 150Ho | |
| 68 | 151Er | |
| 69 | 152Tm | |
| 70 | 153Yb | |
| 71 | 154Lu | |
| 72 | 155Hf | |
| 73 | 156Ta | |
| 74 | 157W | |
External data and identifiers
CAS:14835-21-3InChI Key:FHNFHKCVQCLJFQ-LZFNBGRKSA-NSMILES:[137Xe]PubChem:ID 25087180Adopted Levels, Gammas:NuDat 137Xe
Last update: 2023-04-21
Perma link: https://www.chemlin.org/isotope/xenon-137
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