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Xenon-131

Properties and data of the isotope 131Xe.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Xenon isotopes.

 

General data

Name of the isotope:Xenon-131; Xe-131Symbol:131Xe or 13154XeMass number A:131 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:77Isotopic mass:130.905084(2) u (atomic weight of Xenon-131)Nuclide mass:130.8754626 u (calculated nuclear mass without electrons)Mass excess:-88.41368 MeVMass defect:1.18466626 u (per nucleus)Nuclear binding energy:1103.50951319 MeV (per nucleus)
8.42373674 MeV (average binding energy per nucleon)Separation energy:SN = 6.60441(1) MeV (first neutron)
SP = 8.766(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μN) = +0.691845(7)Charge radius:4.7808(49) femtometer fmYear of discovery:1920

 

Parent Nuclides

Direct parent isotopes are: 131Cs, 131I.

 

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+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 131Xe

Isotope:131Xe-NMRQuantity:21.232(51) %Spin:3/2+Nuclearmagnetic moment
μ/μN:+0.691845(7)Gyromagnetic ratio γ:2.2091 · 107 rad T-1 s-1Nuclear g-factor:gl = 0.46123Quadrupole moment Q:- 0.1146(11) barn (100 fm2)Resonance frequency:v0 = 3.5159 at 1 TRelative Sensitivity:0.00282 (H0 = const.)
0.4129 (v0 = const.)
[related to 1H = 1.000]

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
131mXe163.930(8) keV11.84(4) d11/2-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 77) and isobaric (same nucleon number A = 131) with Xenon-131. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 77Isobar A = 131
43120Tc
44121Ru
45122Rh
46123Pd
47124Ag131Ag
48125Cd131Cd
49126In131In
50127Sn131Sn
51128Sb131Sb
52129Te131Te
53130I131I
54131Xe131Xe
55132Cs131Cs
56133Ba131Ba
57134La131La
58135Ce131Ce
59136Pr131Pr
60137Nd131Nd
61138Pm131Pm
62139Sm131Sm
63140Eu131Eu
64141Gd
65142Tb
66143Dy
67144Ho
68145Er
69146Tm

 

External data and identifiers

Adopted Levels, Gammas:NuDat 131Xe

 

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Last update: 2020-10-18

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