Krypton-89
Properties and data of the isotope 89Kr.
See also: List of individual Krypton isotopes (and general data sources).
General data
Name of the isotope:Krypton-89; Kr-89Symbol:89Kr or 8936KrMass number A:89 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:53Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.4722222222222 (= neutron-proton ratio)Neutron excess (N-Z):17Isotopic mass:88.9178354(23) u (atomic weight of Krypton-89)Nuclide mass:88.8980873 u (calculated nuclear mass without electrons)Mass excess:-76.53583 MeVMass defect:0.82310630000001 u (per nucleus)Nuclear binding energy:766.71857981 MeV (per nucleus)
8.6148155 MeV (average binding energy per nucleon)Separation energy:SN = 4.916(3) MeV (first neutron)
SP = 13.109(4) MeV (first proton)Half-life:3.15(4) minDecay constant λ:0.0036674453997881 s-1Specific activity α:2.509758272005 × 10+19 Bq g-1
678313046.48805 Ci g-1Spin and parity:
(nuclear angular momentum)3/2(+)Magnetic dipole moment:μ(μN) = - 0.330(3)Quadrupole moment Q:+ 0.16(2) barn (100 fm2)Nuclear g-factor:gl = -0.22Charge radius:4.2286(54) femtometer fmYear of discovery:1940
Radioactive Decay
Half-life T½ = 3.15(4) min (minutes) respectively 1.89 × 102 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 89Rb | 100 % | 5.177(6) MeV | |
Parent Nuclides
Direct parent isotopes are: 89Br, 90Br, 252Cf.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 53) and isobaric (same nucleon number A = 89) with Krypton-89. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 53 | Isobar A = 89 |
|---|
| 29 | 82Cu | |
| 30 | 83Zn | |
| 31 | 84Ga | |
| 32 | 85Ge | 89Ge |
| 33 | 86As | 89As |
| 34 | 87Se | 89Se |
| 35 | 88Br | 89Br |
| 36 | 89Kr | 89Kr |
| 37 | 90Rb | 89Rb |
| 38 | 91Sr | 89Sr |
| 39 | 92Y | 89Y |
| 40 | 93Zr | 89Zr |
| 41 | 94Nb | 89Nb |
| 42 | 95Mo | 89Mo |
| 43 | 96Tc | 89Tc |
| 44 | 97Ru | 89Ru |
| 45 | 98Rh | 89Rh |
| 46 | 99Pd | |
| 47 | 100Ag | |
| 48 | 101Cd | |
| 49 | 102In | |
| 50 | 103Sn | |
| 51 | 104Sb | |
| 52 | 105Te | |
External data and identifiers
Last update: 2023-04-27
Perma link: https://www.chemlin.org/isotope/krypton-89
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