Gallium-71

Properties and data of the isotope ⁷¹Ga.

Contents

General data

Name of the isotope:Gallium-71; Ga-71Symbol:⁷¹Ga or 7131GaMass number A:71 (= number of nucleons)Atomic number Z:31 (= number of protons)Neutrons N:40Isotopic mass:70.924703(6) u (atomic weight of Gallium-71)Nuclide mass:70.9076976 u (calculated nuclear mass without electrons)Mass excess:-70.1387 MeVMass defect:0.66446963200001 u (per nucleus)Nuclear binding energy:618.94947539 MeV (per nucleus)
8.71759824 MeV (average binding energy per nucleon)Separation energy:S_N = 9.3003(14) MeV (first neutron)
S_P = 7.8634(21) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = +2.56033(9)Charge radius:4.0118(18) femtometer fmYear of discovery:1923

Parent Nuclides

Direct parent isotopes are: ⁷¹Ge, ⁷¹Zn.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Gallium Isotopic mixture	69.723 u	100 %
Isotope ⁶⁹Ga	68.925574(8) u	60.108(50) %	stable	3/2-
Isotope ⁷¹Ga	70.924703(6) u	39.892(50) %	stable	3/2-

NMR data

Nuclear magnetic properties of the NMR active Nuclide ⁷¹Ga

Isotope:⁷¹Ga-NMRQuantity:39.892(50) %Spin:3/2-Nuclearmagnetic moment
μ/μ_N:+2.56033(9)Gyromagnetic ratio γ:8.1812 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 1.7068866666667Quadrupole moment Q:+ 0.107(1) barn (100 fm²)Resonance frequency:v₀ = 13.0208 at 1 TRelative Sensitivity:0.14300 (H₀ = const.)
1.5291 (v₀ = const.)
[related to ¹H = 1.000]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 71) with Gallium-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 40	Isobar A = 71
21	⁶¹Sc
22	⁶²Ti
23	⁶³V
24	⁶⁴Cr
25	⁶⁵Mn	⁷¹Mn
26	⁶⁶Fe	⁷¹Fe
27	⁶⁷Co	⁷¹Co
28	⁶⁸Ni	⁷¹Ni
29	⁶⁹Cu	⁷¹Cu
30	⁷⁰Zn	⁷¹Zn
31	⁷¹Ga	⁷¹Ga
32	⁷²Ge	⁷¹Ge
33	⁷³As	⁷¹As
34	⁷⁴Se	⁷¹Se
35	⁷⁵Br	⁷¹Br
36	⁷⁶Kr	⁷¹Kr
37	⁷⁷Rb	⁷¹Rb
38	⁷⁸Sr
39	⁷⁹Y
40	⁸⁰Zr
41	⁸¹Nb
42	⁸²Mo