Cesium-132
Properties and data of the isotope 132Cs.
See also: list of Cesium isotopes.
General data
Name of the isotope:Cesium-132; Cs-132Symbol:132Cs or 13255CsMass number A:132 (= number of nucleons)Atomic number Z:55 (= number of protons)Neutrons N:77Isotopic mass:131.9064377(11) u (atomic weight of Cesium-132)Nuclide mass:131.8762678 u (calculated nuclear mass without electrons)Mass excess:-87.15272 MeVMass defect:1.191137592 u (per nucleus)Nuclear binding energy:1109.53752012 MeV (per nucleus)
8.40558727 MeV (average binding energy per nucleon)Separation energy:SN = 7.165(5) MeV (first neutron)
SP = 6.0281(10) MeV (first proton)Half-life:6.480(6) dDecay constant λ:1.238045804326 × 10-6 s-1Specific activity α:5.691363530311 × 10+15 Bq g-1
153820.63595437 Ci g-1Spin and parity:
(nuclear angular momentum)2+Magnetic dipole moment:μ(μN) = + 2.219(7)Quadrupole moment Q:+ 0.508(7) barn (100 fm2)Nuclear g-factor:gl = 1.1095Charge radius:4.8002(46) femtometer fmYear of discovery:1953
Radioactive Decay
Half-life T½ = 6.480(6) d respectively 5.59872 × 105 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 132Xe | 98.13(9) % | 2.1263(10) MeV | |
| β- | 132Ba | 1.87(9) % | 1.2823(15) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 77) and isobaric (same nucleon number A = 132) with Cesium-132. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 77 | Isobar A = 132 |
|---|
| 43 | 120Tc | |
| 44 | 121Ru | |
| 45 | 122Rh | |
| 46 | 123Pd | |
| 47 | 124Ag | 132Ag |
| 48 | 125Cd | 132Cd |
| 49 | 126In | 132In |
| 50 | 127Sn | 132Sn |
| 51 | 128Sb | 132Sb |
| 52 | 129Te | 132Te |
| 53 | 130I | 132I |
| 54 | 131Xe | 132Xe |
| 55 | 132Cs | 132Cs |
| 56 | 133Ba | 132Ba |
| 57 | 134La | 132La |
| 58 | 135Ce | 132Ce |
| 59 | 136Pr | 132Pr |
| 60 | 137Nd | 132Nd |
| 61 | 138Pm | 132Pm |
| 62 | 139Sm | 132Sm |
| 63 | 140Eu | 132Eu |
| 64 | 141Gd | |
| 65 | 142Tb | |
| 66 | 143Dy | |
| 67 | 144Ho | |
| 68 | 145Er | |
| 69 | 146Tm | |
External data and identifiers
Last update: 2020-10-18
Perma link: https://www.chemlin.org/isotope/cesium-132
© 1996 - 2025 ChemLin
