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Mercury-199

Properties and data of the isotope 199Hg.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Mercury isotopes.

 

General data

Name of the isotope:Mercury-199; Hg-199Symbol:199Hg or 19980HgMass number A:199 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:119Isotopic mass:198.968281(3) u (atomic weight of Mercury-199)Nuclide mass:198.9243994 u (calculated nuclear mass without electrons)Mass excess:-29.54606 MeVMass defect:1.688846564 u (per nucleus)Nuclear binding energy:1573.15044129 MeV (per nucleus)
7.9052786 MeV (average binding energy per nucleon)Separation energy:SN = 6.6631(6) MeV (first neutron)
SP = 7.2543(6) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μN) = + 0.5058855(9)Charge radius:5.4474(31) femtometer fmYear of discovery:1925

 

Parent Nuclides

Direct parent isotopes are: 199Tl, 199Au.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Mercury
Isotopic mixture		200.592 u100 %
Isotope 196Hg195.96583(2) u0.15(1) %stable0+
Isotope 198Hg197.966769(3) u10.04(3) %stable0+
Isotope 199Hg198.968281(3) u16.94(12) %stable1/2-
Isotope 200Hg199.968327(3) u23.14(9) %stable0+
Isotope 201Hg200.970303(5) u13.17(9) %stable3/2-
Isotope 202Hg201.970643(5) u29.74(13) %stable0+
Isotope 204Hg203.973494(3) u6.82(4) %stable0+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 199Hg

Isotope:199Hg-NMRQuantity:16.94(12) %Spin:1/2-Nuclearmagnetic moment
μ/μN:+ 0.5058855(9)Gyromagnetic ratio γ:4.8458 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.011771Resonance frequency:v0 = 7.7123 at 1 TRelative Sensitivity:0.00594 (H0 = const.)
0.1811 (v0 = const.)
[related to 1H = 1.000]

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
199mHg532.48(19) keV42.67(9) min13/2+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 119) and isobaric (same nucleon number A = 199) with Mercury-199. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 119Isobar A = 199
73192Ta
74193W
75194Re199Re
76195Os199Os
77196Ir199Ir
78197Pt199Pt
79198Au199Au
80199Hg199Hg
81200Tl199Tl
82201Pb199Pb
83202Bi199Bi
84203Po199Po
85204At199At
86205Rn199Rn
87206Fr199Fr
88207Ra
89208Ac
90209Th

 

External data and identifiers

Adopted Levels, Gammas:NuDat 199Hg

 

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Last update: 2020-10-22

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