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Xenon-134

Properties and data of the isotope 134Xe.

Contents
General Data
Radioactive Decay
Parent Nuclides
Isotones und Isobares

See also: list of Xenon isotopes.

 

General data

Name of the isotope:Xenon-134; Xe-134Symbol:134Xe or 13454XeMass number A:134 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:80Isotopic mass:133.905393033(10) u (atomic weight of Xenon-134)Nuclide mass:133.8757716 u (calculated nuclear mass without electrons)Mass excess:-88.12582 MeVMass defect:1.210351975 u (per nucleus)Nuclear binding energy:1127.4356026 MeV (per nucleus)
8.41369853 MeV (average binding energy per nucleon)Separation energy:SN = 8.5536(24) MeV (first neutron)
SP = 9.557(6) MeV (first proton)Half-life:5.8 × 1022 aDecay constant λ:3.789578087877 × 10-31 s-1Specific activity α:1.715892710144 × 10-9 Bq g-1
4.637547865256 × 10-20 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.7899(47) femtometer fmYear of discovery:1920

 

Radioactive Decay

Half-life T½ = 5.8 × 1022 a respectively 1.829088 × 1030 seconds s.

Decay
mode		DaughterProbabilityDecay energyγ energy
(intensity)
2 β-134Ba> 0 %

 

Parent Nuclides

Direct parent isotopes are: 134Cs, 134I.

 

Occurrence

Comparison of the natural Xenon isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Xenon
Isotopic mixture		131.293 u100 %
Isotope 124Xe123.90589(2) u0.095(5) %> 1.8 × 1022 a0+
Isotope 126Xe125.90430(3) u0.089(3) %stable0+
Isotope 128Xe127.903531(7) u1.910(13) %stable0+
Isotope 129Xe128.90478086(4) u26.401(138) %stable1/2+
Isotope 130Xe129.9035094(1) u4.071(22) %stable0+
Isotope 131Xe130.905084(2) u21.232(51) %stable3/2+
Isotope 132Xe131.90415509(4) u26.909(55) %stable0+
Isotope 134Xe133.905393033(10) u10.436(35) %5.8 × 1022 a0+
Isotope 136Xe135.90721448(7) u8.857(72) %2.165(61) × 1021 a0+

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
134mXe1965.5(5) keV290(17) ms7-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 134) with Xenon-134. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 80Isobar A = 134
44124Ru
45125Rh
46126Pd
47127Ag
48128Cd134Cd
49129In134In
50130Sn134Sn
51131Sb134Sb
52132Te134Te
53133I134I
54134Xe134Xe
55135Cs134Cs
56136Ba134Ba
57137La134La
58138Ce134Ce
59139Pr134Pr
60140Nd134Nd
61141Pm134Pm
62142Sm134Sm
63143Eu134Eu
64144Gd134Gd
65145Tb
66146Dy
67147Ho
68148Er
69149Tm
70150Yb
71151Lu

 

External data and identifiers

Adopted Levels, Gammas:NuDat 134Xe

 

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Last update: 2020-10-18

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