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Hafnium-176

Properties and data of the isotope 176Hf.


Content

See also: list of Hafnium isotopes.

 

General data

Name of the isotope:Hafnium-176; Hf-176Symbol:176Hf or 17672HfMass number A:176 (= number of nucleons)Atomic number Z:72 (= number of protons)Neutrons N:104Isotopic mass:175.94141(2) u (atomic weight of Hafnium-176)Nuclide mass:175.901916 u (calculated nuclear mass without electrons)Mass excess:-54.57623 MeVMass defect:1.523143568 u (per nucleus)Nuclear binding energy:1418.79909473 MeV (per nucleus)
8.06135849 MeV (average binding energy per nucleon)
Separation energy:SN = 8.1660(18) MeV (first neutron)
SP = 6.6997(9) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:5.3286(32) femtometer fmYear of discovery:1934

 

Parent Nuclides

Direct parent isotopes are: 176Ta, 176Lu.

 

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+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 104) and isobaric (same nucleon number A = 176) with Hafnium-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 104Isobar A = 176
62166Sm
63167Eu
64168Gd
65169Tb
66170Dy
67171Ho
68172Er176Er
69173Tm176Tm
70174Yb176Yb
71175Lu176Lu
72176Hf176Hf
73177Ta176Ta
74178W176W
75179Re176Re
76180Os176Os
77181Ir176Ir
78182Pt176Pt
79183Au176Au
80184Hg176Hg
81185Tl176Tl
82186Pb
83187Bi
84188Po

 

External data and identifiers

Adopted Levels, Gammas:NuDat 176Hf

 


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Last update: 2020-10-20


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