Gallium-64

Properties and data of the isotope ⁶⁴Ga.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Gallium isotopes (and general data sources).

General data

Name of the isotope:Gallium-64; Ga-64Symbol:⁶⁴Ga or 6431GaMass number A:64 (= number of nucleons)Atomic number Z:31 (= number of protons)Neutrons N:33Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.0645161290323 (= neutron-proton ratio)Neutron excess (N-Z):2Isotopic mass:63.9368404(15) u (atomic weight of Gallium-64)Nuclide mass:63.919835 u (calculated nuclear mass without electrons)Mass excess:-58.83279 MeVMass defect:0.59167781999999 u (per nucleus)Nuclear binding energy:551.14433926 MeV (per nucleus)
8.6116303 MeV (average binding energy per nucleon)Separation energy:S_N = 10.3570(19) MeV (first neutron)
S_P = 3.9084(21) MeV (first proton)Half-life:2.627(12) minDecay constant λ:0.0043975839396012 s^-1Specific activity α:4.203630147249 × 10⁺¹⁹ Bq g^-1
1136116256.0135 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Arsenic-64Year of discovery:1953

Radioactive Decay

Half-life T_½ = 2.627(12) min (minutes) respectively 1.5762 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁶⁴Zn	100 %	7.1712(16) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁴Ge.

Nuclear Isomers

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

Nuclear Isomer	Excitation Energy	Half-life	Spin
^64mGa	42.85(8) keV	21.9(7) μs	(2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 33) and isobaric (same nucleon number A = 64) with Gallium-64. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 33	Isobar A = 64
16	⁴⁹S
17	⁵⁰Cl
18	⁵¹Ar
19	⁵²K
20	⁵³Ca
21	⁵⁴Sc
22	⁵⁵Ti	⁶⁴Ti
23	⁵⁶V	⁶⁴V
24	⁵⁷Cr	⁶⁴Cr
25	⁵⁸Mn	⁶⁴Mn
26	⁵⁹Fe	⁶⁴Fe
27	⁶⁰Co	⁶⁴Co
28	⁶¹Ni	⁶⁴Ni
29	⁶²Cu	⁶⁴Cu
30	⁶³Zn	⁶⁴Zn
31	⁶⁴Ga	⁶⁴Ga
32	⁶⁵Ge	⁶⁴Ge
33	⁶⁶As	⁶⁴As
34	⁶⁷Se	⁶⁴Se
35	⁶⁸Br
36	⁶⁹Kr