Krypton-74
Properties and data of the isotope 74Kr.
See also: list of Krypton isotopes.
General data
Name of the isotope:Krypton-74; Kr-74Symbol:74Kr or 7436KrMass number A:74 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:38Isotopic mass:73.9330840(22) u (atomic weight of Krypton-74)Nuclide mass:73.9133359 u (calculated nuclear mass without electrons)Mass excess:-62.33185 MeVMass defect:0.67788396 u (per nucleus)Nuclear binding energy:631.44484144 MeV (per nucleus)
8.5330384 MeV (average binding energy per nucleon)Separation energy:SN = 13.851(7) MeV (first neutron)
SP = 5.973(8) MeV (first proton)Half-life:11.50(11) minDecay constant λ:0.0010045611312463 s-1Specific activity α:8.287135116140 × 10+18 Bq g-1
223976624.76056 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.1870(41) femtometer fmMirror nucleus:Strontium-74Year of discovery:1960
Radioactive Decay
Half-life T½ = 11.50(11) min (minutes) respectively 6.90 × 102 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EE/β+ | 74Br | 100 % | 2.956(6) MeV | |
Parent Nuclides
Direct parent isotopes are: 74Rb, 75Sr.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 38) and isobaric (same nucleon number A = 74) with Krypton-74. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 38 | Isobar A = 74 |
20 | 58Ca | |
21 | 59Sc | |
22 | 60Ti | |
23 | 61V | |
24 | 62Cr | |
25 | 63Mn | |
26 | 64Fe | 74Fe |
27 | 65Co | 74Co |
28 | 66Ni | 74Ni |
29 | 67Cu | 74Cu |
30 | 68Zn | 74Zn |
31 | 69Ga | 74Ga |
32 | 70Ge | 74Ge |
33 | 71As | 74As |
34 | 72Se | 74Se |
35 | 73Br | 74Br |
36 | 74Kr | 74Kr |
37 | 75Rb | 74Rb |
38 | 76Sr | 74Sr |
39 | 77Y | |
40 | 78Zr | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/krypton-74
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