Krypton-101

Properties and data of the isotope ¹⁰¹Kr.

Contents

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

General data

Name of the isotope:Krypton-101; Kr-101Symbol:¹⁰¹Kr or 10136KrMass number A:101 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:65Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.8055555555556 (= neutron-proton ratio)Neutron excess (N-Z):29Isotopic mass:100.96873(54) u (atomic weight of Krypton-101)Nuclide mass:100.9489819 u (calculated nuclear mass without electrons)Mass excess:-29.12782 MeVMass defect:0.87619069200001 u (per nucleus)Nuclear binding energy:816.16637245 MeV (per nucleus)
8.08085517 MeV (average binding energy per nucleon)Separation energy:S_N = 2.15(64) MeV (first neutron)Half-life:635 nsDecay constant λ:1091570.3630865 s^-1Specific activity α:6.573590485039 × 10⁺²⁷ Bq g^-1
1.776646077037 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 635 ns respectively 6.35 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹⁰¹Rb	?	13.72(54) MeV
β^-, n	¹⁰⁰Rb	?	2.15(64) MeV
β^-, 2n	⁹⁹Rb	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 65) and isobaric (same nucleon number A = 101) with Krypton-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 65	Isobar A = 101
36	¹⁰¹Kr	¹⁰¹Kr
37	¹⁰²Rb	¹⁰¹Rb
38	¹⁰³Sr	¹⁰¹Sr
39	¹⁰⁴Y	¹⁰¹Y
40	¹⁰⁵Zr	¹⁰¹Zr
41	¹⁰⁶Nb	¹⁰¹Nb
42	¹⁰⁷Mo	¹⁰¹Mo
43	¹⁰⁸Tc	¹⁰¹Tc
44	¹⁰⁹Ru	¹⁰¹Ru
45	¹¹⁰Rh	¹⁰¹Rh
46	¹¹¹Pd	¹⁰¹Pd
47	¹¹²Ag	¹⁰¹Ag
48	¹¹³Cd	¹⁰¹Cd
49	¹¹⁴In	¹⁰¹In
50	¹¹⁵Sn	¹⁰¹Sn
51	¹¹⁶Sb
52	¹¹⁷Te
53	¹¹⁸I
54	¹¹⁹Xe
55	¹²⁰Cs
56	¹²¹Ba
57	¹²²La
58	¹²³Ce
59	¹²⁴Pr
60	¹²⁵Nd
61	¹²⁶Pm