Krypton-83

Properties and data of the isotope ⁸³Kr.

Contents

General Data

Parent Nuclides

NMR Data

Isotones und Isobares

Literature

Krypton-83 is a stable isotope of the chemical element krypton, which has 47 neutrons in its atomic nucleus in addition to the element-specific 36 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 83. Kr-83 accounts for 11,50 % of natural terrestrial krypton deposits.

The first mass spectrographic detection and thus the discovery of Krypton was reported in 1920 [1].

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

General data

Name of the isotope:Krypton-83; Kr-83Symbol:⁸³Kr or 8336KrMass number A:83 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:47Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3055555555556 (= neutron-proton ratio)Neutron excess (N-Z):11Isotopic mass:82.914126517(10) u (atomic weight of Krypton-83)Nuclide mass:82.8943784 u (calculated nuclear mass without electrons)Mass excess:-79.99063 MeVMass defect:0.774825687 u (per nucleus)Nuclear binding energy:721.74547849 MeV (per nucleus)
8.69572866 MeV (average binding energy per nucleon)Separation energy:S_N = 7.470166(9) MeV (first neutron)
S_P = 9.7809(10) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = -0.970730(3)Charge radius:4.1871(23) femtometer fmYear of discovery:1920

Parent Nuclides

Direct parent isotopes are: ⁸³Rb, ⁸³Br.

Occurrence

Comparison of the natural Krypton isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Krypton Isotopic mixture	83.798 u	100 %
Isotope ⁷⁸Kr	77.920365(5) u	0.355(3) %	stable	0+
Isotope ⁸⁰Kr	79.916378(5) u	2.286(10) %	stable	0+
Isotope ⁸²Kr	81.913483(6) u	11.593(31) %	stable	0+
Isotope ⁸³Kr	82.914126517(10) u	11.500(19) %	stable	9/2+
Isotope ⁸⁴Kr	83.91149773(3) u	56.987(15) %	stable	0+
Isotope ⁸⁶Kr	85.91061063(3) u	17.279(41) %	stable	0+

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ⁸³Kr

Isotope:⁸³Kr-NMRQuantity:11.500(19) %Spin:9/2+Nuclearmagnetic moment
μ/μ_N:-0.970730(3)Gyromagnetic ratio γ:-1.0331 · 10⁷ rad T^-1 s^-1
-1.64423 MHz T^-1Nuclear g-factor:g_l = -0.21571777777778Quadrupole moment Q:+0.259(1) barn (100 fm²)Line width parameter (factor):l = 49.69 fm⁴Resonance frequency:v₀ = 1.6442 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.00190 (H₀ = const.)
1.2744 (v₀ = const.)
0.000218 (at natural abundance)
relative receptivity as compared to ¹³C:
1.28 (at natural abundance)
5.59 (enriched)Reference compound:
(conditions)Krypton gasFrequency ratio:Ξ(⁸³Kr) = 3.847600 % [based on the reference substance]Chemical shift range:ca. 140 ppm [-140 to 0]

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^83m1Kr	9.4057(6) keV	156.8(5) ns	7/2+
^83m2Kr	41.5575(7) keV	1.83(2) h	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 47) and isobaric (same nucleon number A = 83) with Krypton-83. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 47	Isobar A = 83
26	⁷³Fe
27	⁷⁴Co
28	⁷⁵Ni
29	⁷⁶Cu
30	⁷⁷Zn	⁸³Zn
31	⁷⁸Ga	⁸³Ga
32	⁷⁹Ge	⁸³Ge
33	⁸⁰As	⁸³As
34	⁸¹Se	⁸³Se
35	⁸²Br	⁸³Br
36	⁸³Kr	⁸³Kr
37	⁸⁴Rb	⁸³Rb
38	⁸⁵Sr	⁸³Sr
39	⁸⁶Y	⁸³Y
40	⁸⁷Zr	⁸³Zr
41	⁸⁸Nb	⁸³Nb
42	⁸⁹Mo	⁸³Mo
43	⁹⁰Tc
44	⁹¹Ru
45	⁹²Rh
46	⁹³Pd
47	⁹⁴Ag
48	⁹⁵Cd
49	⁹⁶In