About   |   More   |   Search
ChemLin Logo

Hafnium-179

Properties and data of the isotope 179Hf.


Content

See also: list of Hafnium isotopes.

 

General data

Name of the isotope:Hafnium-179; Hf-179Symbol:179Hf or 17972HfMass number A:179 (= number of nucleons)Atomic number Z:72 (= number of protons)Neutrons N:107Isotopic mass:178.94582(2) u (atomic weight of Hafnium-179)Nuclide mass:178.906326 u (calculated nuclear mass without electrons)Mass excess:-50.46834 MeVMass defect:1.544728316 u (per nucleus)Nuclear binding energy:1438.90515798 MeV (per nucleus)
8.0385763 MeV (average binding energy per nucleon)
Separation energy:SN = 6.09899(8) MeV (first neutron)
SP = 7.4141(20) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
9/2+Magnetic dipole moment:μ(μN) = - 0.60409(13)Charge radius:5.3408(31) femtometer fmYear of discovery:1934

 

Parent Nuclides

Direct parent isotopes are: 179Ta, 179Lu.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Hafnium
Isotopic mixture
178.486 u100 %
Isotope 174Hf173.94005(2) u0.16(12) %2.0(4) × 1015 a0+
Isotope 176Hf175.94141(2) u5.26(70) %stable0+
Isotope 177Hf176.94323(2) u18.60(16) %stable7/2-
Isotope 178Hf177.94371(2) u27.28(28) %stable0+
Isotope 179Hf178.94582(2) u13.62(11) %stable9/2+
Isotope 180Hf179.94656(2) u35.08(33) %stable0+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 179Hf

Isotope:179Hf-NMRQuantity:13.62(11) %Spin:9/2+Nuclearmagnetic moment
μ/μN:
- 0.60409(13)Gyromagnetic ratio γ:0.6821 · 107 rad T-1 s-1Nuclear g-factor:gl = -0.13424222222222Quadrupole moment Q:+ 3.793(33) barn (100 fm2)Resonance frequency:v0 = 1.0856 at 1 TRelative Sensitivity:0.00055 (H0 = const.)
0.8414 (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
179m1Hf375.0352(25) keV18.67(4) s1/2-
179m2Hf1105.74(16) kev25.05(25) d25/2-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 179) with Hafnium-179. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 107Isobar A = 179
65172Tb
66173Dy
67174Ho
68175Er
69176Tm179Tm
70177Yb179Yb
71178Lu179Lu
72179Hf179Hf
73180Ta179Ta
74181W179W
75182Re179Re
76183Os179Os
77184Ir179Ir
78185Pt179Pt
79186Au179Au
80187Hg179Hg
81188Tl179Tl
82189Pb179Pb
83190Bi
84191Po
85192At
86193Rn

 

External data and identifiers

Adopted Levels, Gammas:NuDat 179Hf

 


More Chemistry

isotopes

 

 

 

 

Social Media

Facebook

LinkedIn

Twitter

 

 


Last update: 2020-10-20


© 1996 - 2023 ChemLin