Rubidium-82
Properties and data of the isotope 82Rb.
See also: list of Rubidium isotopes.
General data
Name of the isotope:Rubidium-82; Rb-82Symbol:82Rb or 8237RbMass number A:82 (= number of nucleons)Atomic number Z:37 (= number of protons)Neutrons N:45Isotopic mass:81.918209(3) u (atomic weight of Rubidium-82)Nuclide mass:81.8979123 u (calculated nuclear mass without electrons)Mass excess:-76.18783 MeVMass defect:0.761238404 u (per nucleus)Nuclear binding energy:709.0890059 MeV (per nucleus)
8.6474269 MeV (average binding energy per nucleon)Separation energy:SN = 8.802(6) MeV (first neutron)
SP = 5.781(3) MeV (first proton)Half-life:1.2575(2) minDecay constant λ:0.0091868413593101 s-1Specific activity α:6.830179348599 × 10+19 Bq g-1
1845994418.5405 Ci g-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μN) = +0.5545083(11)Quadrupole moment Q:+0.23(10) barn (100 fm2)Nuclear g-factor:gl = 0.5545083Charge radius:4.2160(42) femtometer fmYear of discovery:1949
Radioactive Decay
Half-life T½ = 1.2575(2) min (minutes) respectively 7.545 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 82Kr | 100 % | 4.404(3) MeV | |
Parent Nuclides
Direct parent isotope is: 82Sr.
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 82mRb | 69.0(15) keV | 6.472(6) h | 5- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 45) and isobaric (same nucleon number A = 82) with Rubidium-82. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 45 | Isobar A = 82 |
|---|
| 25 | 70Mn | |
| 26 | 71Fe | |
| 27 | 72Co | |
| 28 | 73Ni | |
| 29 | 74Cu | 82Cu |
| 30 | 75Zn | 82Zn |
| 31 | 76Ga | 82Ga |
| 32 | 77Ge | 82Ge |
| 33 | 78As | 82As |
| 34 | 79Se | 82Se |
| 35 | 80Br | 82Br |
| 36 | 81Kr | 82Kr |
| 37 | 82Rb | 82Rb |
| 38 | 83Sr | 82Sr |
| 39 | 84Y | 82Y |
| 40 | 85Zr | 82Zr |
| 41 | 86Nb | 82Nb |
| 42 | 87Mo | 82Mo |
| 43 | 88Tc | |
| 44 | 89Ru | |
| 45 | 90Rh | |
| 46 | 91Pd | |
| 47 | 92Ag | |
External data and identifiers
Literature and References
[1] - Jean-François Chatal et al.:
Story of rubidium-82 and advantages for myocardial perfusion PET imaging.
In: Frontiers in Medicine, (2015), DOI 10.3389/fmed.2015.00065.
Last update: 2023-05-22
Perma link: https://www.chemlin.org/isotope/rubidium-82
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