About   |   More   |   Search
ChemLin Logo

Gadolinium-156

Properties and data of the isotope 156Gd.


Content

See also: list of Gadolinium isotopes.

 

General data

Name of the isotope:Gadolinium-156; Gd-156Symbol:156Gd or 15664GdMass number A:156 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:92Isotopic mass:155.92213(2) u (atomic weight of Gadolinium-156)Nuclide mass:155.8870237 u (calculated nuclear mass without electrons)Mass excess:-72.53544 MeVMass defect:1.37584432 u (per nucleus)Nuclear binding energy:1281.59072901 MeV (per nucleus)
8.21532519 MeV (average binding energy per nucleon)
Separation energy:SN = 8.53635(7) MeV (first neutron)
SP = 8.0058(9) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Year of discovery:1933

 

Parent Nuclides

Direct parent isotopes are: 156Tb, 156Eu.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Gadolinium
Isotopic mixture
157.25 u100 %
Isotope 152Gd151.91980(2) u0.20(3) %1.08(8) × 1014 a0+
Isotope 154Gd153.92087(2) u2.18(2) %stable0+
Isotope 155Gd154.92263(2) u14.80(9) %stable3/2-
Isotope 156Gd155.92213(2) u20.47(3) %stable0+
Isotope 157Gd156.92397(2) u15.65(4) %stable3/2-
Isotope 158Gd157.92411(2) u24.84(8) %stable0+
Isotope 160Gd159.92706(2) u21.86(3) %stable0+

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
156mGd1.3(1) μs7-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 92) and isobaric (same nucleon number A = 156) with Gadolinium-156. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 92Isobar A = 156
53145I
54146Xe
55147Cs
56148Ba
57149La156La
58150Ce156Ce
59151Pr156Pr
60152Nd156Nd
61153Pm156Pm
62154Sm156Sm
63155Eu156Eu
64156Gd156Gd
65157Tb156Tb
66158Dy156Dy
67159Ho156Ho
68160Er156Er
69161Tm156Tm
70162Yb156Yb
71163Lu156Lu
72164Hf156Hf
73165Ta156Ta
74166W
75167Re
76168Os
77169Ir
78170Pt
79171Au
80172Hg

 

External data and identifiers

Adopted Levels, Gammas:NuDat 156Gd

 


More Chemistry

isotopes

 

 

 

 

Social Media

Facebook

LinkedIn

Twitter

 

 


Last update: 2020-10-20


© 1996 - 2024 ChemLin