Krypton-88

Properties and data of the isotope ⁸⁸Kr.

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-88; Kr-88Symbol:⁸⁸Kr or 8836KrMass number A:88 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:52Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4444444444444 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:87.9144479(28) u (atomic weight of Krypton-88)Nuclide mass:87.8946998 u (calculated nuclear mass without electrons)Mass excess:-79.69127 MeVMass defect:0.81782888399999 u (per nucleus)Nuclear binding energy:761.80269847 MeV (per nucleus)
8.65684885 MeV (average binding energy per nucleon)Separation energy:S_N = 7.0531(26) MeV (first neutron)
S_P = 13.089(4) MeV (first proton)Half-life:2.825(19) hDecay constant λ:6.815606495181 × 10^-5 s^-1Specific activity α:4.717763489641 × 10⁺¹⁷ Bq g^-1
12750712.134166 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1939

Radioactive Decay

Half-life T_½ = 2.825(19) h (hours) respectively 1.0170 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁸⁸Rb	100 %	2.9177(26) MeV

Parent Nuclides

Direct parent isotopes are: ⁸⁸Br, ⁸⁹Br, ²⁴⁸Cm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 52) and isobaric (same nucleon number A = 88) with Krypton-88. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 52	Isobar A = 88
28	⁸⁰Ni
29	⁸¹Cu
30	⁸²Zn
31	⁸³Ga
32	⁸⁴Ge	⁸⁸Ge
33	⁸⁵As	⁸⁸As
34	⁸⁶Se	⁸⁸Se
35	⁸⁷Br	⁸⁸Br
36	⁸⁸Kr	⁸⁸Kr
37	⁸⁹Rb	⁸⁸Rb
38	⁹⁰Sr	⁸⁸Sr
39	⁹¹Y	⁸⁸Y
40	⁹²Zr	⁸⁸Zr
41	⁹³Nb	⁸⁸Nb
42	⁹⁴Mo	⁸⁸Mo
43	⁹⁵Tc	⁸⁸Tc
44	⁹⁶Ru	⁸⁸Ru
45	⁹⁷Rh
46	⁹⁸Pd
47	⁹⁹Ag
48	¹⁰⁰Cd
49	¹⁰¹In
50	¹⁰²Sn
51	¹⁰³Sb