Krypton-69
Properties and data of the isotope 69Kr.
See also: list of Krypton isotopes.
General data
Name of the isotope:Krypton-69; Kr-69Symbol:69Kr or 6936KrMass number A:69 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:33Isotopic mass:68.96518(43) u (atomic weight of Krypton-69)Nuclide mass:68.9454319 u (calculated nuclear mass without electrons)Mass excess:-32.43462 MeVMass defect:0.60246337999999 u (per nucleus)Nuclear binding energy:561.19102369 MeV (per nucleus)
8.13320324 MeV (average binding energy per nucleon)Separation energy:
SP = 0.93(48) MeV (first proton)Half-life:28(1) msDecay constant λ:24.755256448569 s-1Specific activity α:2.192347667016 × 10+23 Bq g-1
5925263964910.3 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2-)Isobaric spin: -3/2Mirror nucleus:Arsenic-69Year of discovery:1995
Radioactive Decay
Half-life T½ = 28(1) ms respectively 2.8 × 10-2 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EE/β+ | 69Br | | 13.82(40) MeV | |
β+, p | 68Se | 99 % | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 33) and isobaric (same nucleon number A = 69) with Krypton-69. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 33 | Isobar A = 69 |
16 | 49S | |
17 | 50Cl | |
18 | 51Ar | |
19 | 52K | |
20 | 53Ca | |
21 | 54Sc | |
22 | 55Ti | |
23 | 56V | |
24 | 57Cr | |
25 | 58Mn | 69Mn |
26 | 59Fe | 69Fe |
27 | 60Co | 69Co |
28 | 61Ni | 69Ni |
29 | 62Cu | 69Cu |
30 | 63Zn | 69Zn |
31 | 64Ga | 69Ga |
32 | 65Ge | 69Ge |
33 | 66As | 69As |
34 | 67Se | 69Se |
35 | 68Br | 69Br |
36 | 69Kr | 69Kr |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/krypton-69
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