Krypton-98

Properties and data of the isotope ⁹⁸Kr.

Contents

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

General data

Name of the isotope:Krypton-98; Kr-98Symbol:⁹⁸Kr or 9836KrMass number A:98 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:62Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.7222222222222 (= neutron-proton ratio)Neutron excess (N-Z):26Isotopic mass:97.95243(32) u (atomic weight of Krypton-98)Nuclide mass:97.9326819 u (calculated nuclear mass without electrons)Mass excess:-44.31117 MeVMass defect:0.86649594399999 u (per nucleus)Nuclear binding energy:807.13577286 MeV (per nucleus)
8.23607931 MeV (average binding energy per nucleon)Separation energy:S_N = 4.96(32) MeV (first neutron)
S_P = 17.54(50) MeV (first proton)Half-life:46(8) msDecay constant λ:15.068416968694 s^-1Specific activity α:9.355064899148 × 10⁺²² Bq g^-1
2528395918688.8 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1997

Radioactive Decay

Half-life T_½ = 46(8) ms respectively 4.6 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁸Rb	?	10.06(30) MeV
β^-, n	⁹⁷Rb	7.0(10) %	6.14(30) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 62) and isobaric (same nucleon number A = 98) with Krypton-98. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 62	Isobar A = 98
35	⁹⁷Br	⁹⁸Br
36	⁹⁸Kr	⁹⁸Kr
37	⁹⁹Rb	⁹⁸Rb
38	¹⁰⁰Sr	⁹⁸Sr
39	¹⁰¹Y	⁹⁸Y
40	¹⁰²Zr	⁹⁸Zr
41	¹⁰³Nb	⁹⁸Nb
42	¹⁰⁴Mo	⁹⁸Mo
43	¹⁰⁵Tc	⁹⁸Tc
44	¹⁰⁶Ru	⁹⁸Ru
45	¹⁰⁷Rh	⁹⁸Rh
46	¹⁰⁸Pd	⁹⁸Pd
47	¹⁰⁹Ag	⁹⁸Ag
48	¹¹⁰Cd	⁹⁸Cd
49	¹¹¹In	⁹⁸In
50	¹¹²Sn	⁹⁸Sn
51	¹¹³Sb
52	¹¹⁴Te
53	¹¹⁵I
54	¹¹⁶Xe
55	¹¹⁷Cs
56	¹¹⁸Ba
57	¹¹⁹La
58	¹²⁰Ce
59	¹²¹Pr