Gallium-66

Properties and data of the isotope ⁶⁶Ga.

Content

General data

Name of the isotope:Gallium-66; Ga-66Symbol:⁶⁶Ga or 6631GaMass number A:66 (= number of nucleons)Atomic number Z:31 (= number of protons)Neutrons N:35Isotopic mass:65.9315898(12) u (atomic weight of Gallium-66)Nuclide mass:65.9145844 u (calculated nuclear mass without electrons)Mass excess:-63.72369 MeVMass defect:0.614258252 u (per nucleus)Nuclear binding energy:572.17787619 MeV (per nucleus)
8.66936176 MeV (average binding energy per nucleon)Separation energy:S_N = 9.1375(13) MeV (first neutron)
S_P = 5.1006(12) MeV (first proton)Half-life:9.49(3) hDecay constant λ:2.028881807048 × 10^-5 s^-1Specific activity α:1.879724927724 × 10⁺¹⁷ Bq g^-1
5080337.6424978 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Bromine-66Year of discovery:1937

Radioactive Decay

Half-life T_½ = 9.49(3) h (hours) respectively 3.4164 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁶⁶Zn	100 %	5.1755(13) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁶Ge.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 35) and isobaric (same nucleon number A = 66) with Gallium-66. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 35	Isobar A = 66
18	⁵³Ar
19	⁵⁴K
20	⁵⁵Ca
21	⁵⁶Sc
22	⁵⁷Ti
23	⁵⁸V	⁶⁶V
24	⁵⁹Cr	⁶⁶Cr
25	⁶⁰Mn	⁶⁶Mn
26	⁶¹Fe	⁶⁶Fe
27	⁶²Co	⁶⁶Co
28	⁶³Ni	⁶⁶Ni
29	⁶⁴Cu	⁶⁶Cu
30	⁶⁵Zn	⁶⁶Zn
31	⁶⁶Ga	⁶⁶Ga
32	⁶⁷Ge	⁶⁶Ge
33	⁶⁸As	⁶⁶As
34	⁶⁹Se	⁶⁶Se
35	⁷⁰Br	⁶⁶Br
36	⁷¹Kr
37	⁷²Rb
38	⁷³Sr