Strontium-82
Properties and data of the isotope 82Sr.
See also: list of Strontium isotopes.
General data
Name of the isotope:Strontium-82; Sr-82Symbol:82Sr or 8238SrMass number A:82 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:44Isotopic mass:81.918400(6) u (atomic weight of Strontium-82)Nuclide mass:81.8975548 u (calculated nuclear mass without electrons)Mass excess:-76.00991 MeVMass defect:0.76020751999999 u (per nucleus)Nuclear binding energy:708.12874363 MeV (per nucleus)
8.63571639 MeV (average binding energy per nucleon)Separation energy:SN = 12.553(7) MeV (first neutron)
SP = 7.842(8) MeV (first proton)Half-life:25.35(3) dDecay constant λ:3.164708801592 × 10-7 s-1Specific activity α:2.352879281959 × 10+15 Bq g-1
63591.331944846 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.2478(30) femtometer fmYear of discovery:1952
Radioactive Decay
Half-life T½ = 25.35(3) d respectively 2.190240 × 106 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC | 82Rb | | 0.178(7) MeV | |
Parent Nuclides
Direct parent isotope is: 82Y.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 82) with Strontium-82. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 44 | Isobar A = 82 |
23 | 67V | |
24 | 68Cr | |
25 | 69Mn | |
26 | 70Fe | |
27 | 71Co | |
28 | 72Ni | |
29 | 73Cu | 82Cu |
30 | 74Zn | 82Zn |
31 | 75Ga | 82Ga |
32 | 76Ge | 82Ge |
33 | 77As | 82As |
34 | 78Se | 82Se |
35 | 79Br | 82Br |
36 | 80Kr | 82Kr |
37 | 81Rb | 82Rb |
38 | 82Sr | 82Sr |
39 | 83Y | 82Y |
40 | 84Zr | 82Zr |
41 | 85Nb | 82Nb |
42 | 86Mo | 82Mo |
43 | 87Tc | |
44 | 88Ru | |
45 | 89Rh | |
46 | 90Pd | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/strontium-82
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