Krypton-92

Properties and data of the isotope ⁹²Kr.

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-92; Kr-92Symbol:⁹²Kr or 9236KrMass number A:92 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:56Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5555555555556 (= neutron-proton ratio)Neutron excess (N-Z):20Isotopic mass:91.9261731(29) u (atomic weight of Krypton-92)Nuclide mass:91.906425 u (calculated nuclear mass without electrons)Mass excess:-68.76931 MeVMass defect:0.840763348 u (per nucleus)Nuclear binding energy:783.16601408 MeV (per nucleus)
8.51267407 MeV (average binding energy per nucleon)Separation energy:S_N = 4.867(4) MeV (first neutron)
S_P = 14.951(4) MeV (first proton)Half-life:1.840(8) sDecay constant λ:0.37671042421736 s^-1Specific activity α:2.492970591256 × 10⁺²¹ Bq g^-1
67377583547.476 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.2724(99) femtometer fmYear of discovery:1951

Radioactive Decay

Half-life T_½ = 1.840(8) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹²Rb	99.9778 %	6.003(7) MeV
β^-, n	⁹¹Rb	0.0332(25) %	0.904(8) MeV

Parent Nuclides

Direct parent isotopes are: ⁹²Br, ⁹³Br, ²⁴⁸Cm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 56) and isobaric (same nucleon number A = 92) with Krypton-92. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 56	Isobar A = 92
31	⁸⁷Ga
32	⁸⁸Ge
33	⁸⁹As	⁹²As
34	⁹⁰Se	⁹²Se
35	⁹¹Br	⁹²Br
36	⁹²Kr	⁹²Kr
37	⁹³Rb	⁹²Rb
38	⁹⁴Sr	⁹²Sr
39	⁹⁵Y	⁹²Y
40	⁹⁶Zr	⁹²Zr
41	⁹⁷Nb	⁹²Nb
42	⁹⁸Mo	⁹²Mo
43	⁹⁹Tc	⁹²Tc
44	¹⁰⁰Ru	⁹²Ru
45	¹⁰¹Rh	⁹²Rh
46	¹⁰²Pd	⁹²Pd
47	¹⁰³Ag	⁹²Ag
48	¹⁰⁴Cd
49	¹⁰⁵In
50	¹⁰⁶Sn
51	¹⁰⁷Sb
52	¹⁰⁸Te
53	¹⁰⁹I
54	¹¹⁰Xe