Krypton-100

Properties and data of the isotope ¹⁰⁰Kr.

Contents

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

General data

Name of the isotope:Krypton-100; Kr-100Symbol:¹⁰⁰Kr or 10036KrMass number A:100 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:64Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.7777777777778 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:99.96237(43) u (atomic weight of Krypton-100)Nuclide mass:99.9426219 u (calculated nuclear mass without electrons)Mass excess:-35.05212 MeVMass defect:0.87388577599999 u (per nucleus)Nuclear binding energy:814.01935703 MeV (per nucleus)
8.14019357 MeV (average binding energy per nucleon)Separation energy:S_N = 4.36(57) MeV (first neutron)Half-life:7 msDecay constant λ:99.021025794278 s^-1Specific activity α:6.023419852813 × 10⁺²³ Bq g^-1
16279513115713 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1997

Radioactive Decay

Half-life T_½ = 7 ms respectively 7 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁰Rb	100 %	11.19(40) MeV
β^-, n	⁹⁹Rb	?	8.0(4) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 64) and isobaric (same nucleon number A = 100) with Krypton-100. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 64	Isobar A = 100
36	¹⁰⁰Kr	¹⁰⁰Kr
37	¹⁰¹Rb	¹⁰⁰Rb
38	¹⁰²Sr	¹⁰⁰Sr
39	¹⁰³Y	¹⁰⁰Y
40	¹⁰⁴Zr	¹⁰⁰Zr
41	¹⁰⁵Nb	¹⁰⁰Nb
42	¹⁰⁶Mo	¹⁰⁰Mo
43	¹⁰⁷Tc	¹⁰⁰Tc
44	¹⁰⁸Ru	¹⁰⁰Ru
45	¹⁰⁹Rh	¹⁰⁰Rh
46	¹¹⁰Pd	¹⁰⁰Pd
47	¹¹¹Ag	¹⁰⁰Ag
48	¹¹²Cd	¹⁰⁰Cd
49	¹¹³In	¹⁰⁰In
50	¹¹⁴Sn	¹⁰⁰Sn
51	¹¹⁵Sb
52	¹¹⁶Te
53	¹¹⁷I
54	¹¹⁸Xe
55	¹¹⁹Cs
56	¹²⁰Ba
57	¹²¹La
58	¹²²Ce
59	¹²³Pr
60	¹²⁴Nd