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Barium-135

Properties and data of the isotope 135Ba.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Barium isotopes.

 

General data

Name of the isotope:Barium-135; Ba-135Symbol:135Ba or 13556BaMass number A:135 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:79Isotopic mass:134.905688(2) u (atomic weight of Barium-135)Nuclide mass:134.8749696 u (calculated nuclear mass without electrons)Mass excess:-87.85106 MeVMass defect:1.217042156 u (per nucleus)Nuclear binding energy:1133.66746606 MeV (per nucleus)
8.39753679 MeV (average binding energy per nucleon)Separation energy:SN = 6.97196(10) MeV (first neutron)
SP = 8.2483(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μN) = +0.8381(2)Charge radius:4.8294(47) femtometer fmYear of discovery:1932

 

Parent Nuclides

Direct parent isotopes are: 135La, 135Cs.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Barium
Isotopic mixture		137.327 u100 %
Isotope 130Ba129.90632(2) u0.11(1) %1.6 × 1021 a0+
Isotope 132Ba131.9050611(11) u0.10(1) %stable0+
Isotope 134Ba133.904508(2) u2.42(15) %stable0+
Isotope 135Ba134.905688(2) u6.59(10) %stable3/2+
Isotope 136Ba135.904576(2) u7.85(24) %stable0+
Isotope 137Ba136.905827(2) u11.23(23) %stable3/2+
Isotope 138Ba137.905247(2) u71.70(29) %stable0+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 135Ba

Isotope:135Ba-NMRQuantity:6.59(10) %Spin:3/2+Nuclearmagnetic moment
μ/μN:+0.8381(2)Gyromagnetic ratio γ:2.6755 · 107 rad T-1 s-1Nuclear g-factor:gl = 0.55873333333333Quadrupole moment Q:+ 0.153(2) barn (100 fm2)Resonance frequency:v0 = 4.2617 at 1 TRelative Sensitivity:0.00501 (H0 = const.)
0.5005 (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
135mBa268.218(20) keV28.7(2) h11/2-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 79) and isobaric (same nucleon number A = 135) with Barium-135. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 79Isobar A = 135
44123Ru
45124Rh
46125Pd
47126Ag
48127Cd
49128In135In
50129Sn135Sn
51130Sb135Sb
52131Te135Te
53132I135I
54133Xe135Xe
55134Cs135Cs
56135Ba135Ba
57136La135La
58137Ce135Ce
59138Pr135Pr
60139Nd135Nd
61140Pm135Pm
62141Sm135Sm
63142Eu135Eu
64143Gd135Gd
65144Tb135Tb
66145Dy
67146Ho
68147Er
69148Tm
70149Yb
71150Lu

 

External data and identifiers

Adopted Levels, Gammas:NuDat 135Ba

 

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Last update: 2020-10-19

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