Copper-68m

Properties and data of the isotope ⁶⁸Cu.

Content

General data

Name of the isotope:Copper-68m; Cu-68mSymbol:⁶⁸Cu or 6829CuMass number A:68 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:39Isotopic mass:67.9296109(17) u (atomic weight of Copper-68m)
Excitation energy: 721.26(8) keVNuclide mass:67.9137025 u (calculated nuclear mass without electrons)Mass excess:-65.56702 MeVMass defect:0.635246752 u (per nucleus)Nuclear binding energy:591.72853801 MeV (per nucleus)
8.70189026 MeV (average binding energy per nucleon)Half-life:3.75(5) minDecay constant λ:0.003080654135822 s^-1Specific activity α:2.768975096517 × 10⁺¹⁹ Bq g^-1
748371647.70741 Ci g^-1Spin and parity:
(nuclear angular momentum)6-Magnetic dipole moment:μ(μ_N) = +1.1561(6)Quadrupole moment Q:-0.0440(19) barn (100 fm²)Nuclear g-factor:g_l = 0.19268333333333

Radioactive Decay

Half-life T_½ = 3.75(5) min (minutes) respectively 2.25 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁶⁸Cu	86(2) %
β^-	⁶⁸Zn	14(2) %

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
⁶⁸Cu		30.9(6) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 39) and isobaric (same nucleon number A = 68) with Copper-68m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 39	Isobar A = 68
21	⁶⁰Sc
22	⁶¹Ti
23	⁶²V
24	⁶³Cr	⁶⁸Cr
25	⁶⁴Mn	⁶⁸Mn
26	⁶⁵Fe	⁶⁸Fe
27	⁶⁶Co	⁶⁸Co
28	⁶⁷Ni	⁶⁸Ni
29	⁶⁸Cu	⁶⁸Cu
30	⁶⁹Zn	⁶⁸Zn
31	⁷⁰Ga	⁶⁸Ga
32	⁷¹Ge	⁶⁸Ge
33	⁷²As	⁶⁸As
34	⁷³Se	⁶⁸Se
35	⁷⁴Br	⁶⁸Br
36	⁷⁵Kr	⁶⁸Kr
37	⁷⁶Rb
38	⁷⁷Sr
39	⁷⁸Y
40	⁷⁹Zr
42	⁸¹Mo