Krypton-94

Properties and data of the isotope ⁹⁴Kr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Krypton isotopes (and general data sources).

General data

Name of the isotope:Krypton-94; Kr-94Symbol:⁹⁴Kr or 9436KrMass number A:94 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:58Isotopic mass:93.934140(13) u (atomic weight of Krypton-94)Nuclide mass:93.9143919 u (calculated nuclear mass without electrons)Mass excess:-61.34819 MeVMass defect:0.85012628 u (per nucleus)Nuclear binding energy:791.88752906 MeV (per nucleus)
8.42433542 MeV (average binding energy per nucleon)Separation energy:S_N = 5.283(12) MeV (first neutron)
S_P = 15.75(43) MeV (first proton)Half-life:212(5) msDecay constant λ:3.2695621724526 s^-1Specific activity α:2.117178919659 × 10⁺²² Bq g^-1
572210518826.81 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.3002(129) femtometer fmYear of discovery:1972

Radioactive Decay

Half-life T_½ = 212(5) ms respectively 2.12 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁴Rb	98.89 %	7.215(12) MeV
β^-, n	⁹³Rb	1.11(7) %	3.201(14) MeV

Parent Nuclides

Direct parent isotope is: ²⁴⁸Cm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 58) and isobaric (same nucleon number A = 94) with Krypton-94. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 58	Isobar A = 94
32	⁹⁰Ge
33	⁹¹As
34	⁹²Se	⁹⁴Se
35	⁹³Br	⁹⁴Br
36	⁹⁴Kr	⁹⁴Kr
37	⁹⁵Rb	⁹⁴Rb
38	⁹⁶Sr	⁹⁴Sr
39	⁹⁷Y	⁹⁴Y
40	⁹⁸Zr	⁹⁴Zr
41	⁹⁹Nb	⁹⁴Nb
42	¹⁰⁰Mo	⁹⁴Mo
43	¹⁰¹Tc	⁹⁴Tc
44	¹⁰²Ru	⁹⁴Ru
45	¹⁰³Rh	⁹⁴Rh
46	¹⁰⁴Pd	⁹⁴Pd
47	¹⁰⁵Ag	⁹⁴Ag
48	¹⁰⁶Cd	⁹⁴Cd
49	¹⁰⁷In
50	¹⁰⁸Sn
51	¹⁰⁹Sb
52	¹¹⁰Te
53	¹¹¹I
54	¹¹²Xe
55	¹¹³Cs
56	¹¹⁴Ba