Germanium-69m2

Properties and data of the isotope ^69m2Ge.

Contents

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

General data

Name of the isotope:Germanium-69m2; Ge-69m2Symbol:^69m2Ge or 69m232GeMass number A:69 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:37Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.15625 (= neutron-proton ratio)Neutron excess (N-Z):5Excitation energy:397.94(2) keVIsotopic mass:68.9279645(14) u (atomic weight of Germanium-69m2)Nuclide mass:68.9104105 u (calculated nuclear mass without electrons)Mass excess:-67.10064 MeVMass defect:0.643038416 u (per nucleus)Nuclear binding energy:598.98642627 MeV (per nucleus)
8.6809627 MeV (average binding energy per nucleon)Half-life:2.81(5) μsDecay constant λ:246671.59450532 s^-1Specific activity α:2.155135545319 × 10⁺²⁷ Bq g^-1
5.824690663025 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = -1.001(3)Quadrupole moment Q:0.75(8) barn (100 fm²)Nuclear g-factor:g_l = -0.22244444444444

Radioactive Decay

Half-life T_½ = 2.81(5) μs respectively 2.81 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁶⁹Ge	100 %

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
⁶⁹Ge		39.05(10) h	5/2-
^69m1Ge	86.76(2) keV	5.1(2) μs	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 69) with Germanium-69m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 37	Isobar A = 69
19	⁵⁶K
20	⁵⁷Ca
21	⁵⁸Sc
22	⁵⁹Ti
23	⁶⁰V
24	⁶¹Cr
25	⁶²Mn	⁶⁹Mn
26	⁶³Fe	⁶⁹Fe
27	⁶⁴Co	⁶⁹Co
28	⁶⁵Ni	⁶⁹Ni
29	⁶⁶Cu	⁶⁹Cu
30	⁶⁷Zn	⁶⁹Zn
31	⁶⁸Ga	⁶⁹Ga
32	⁶⁹Ge	⁶⁹Ge
33	⁷⁰As	⁶⁹As
34	⁷¹Se	⁶⁹Se
35	⁷²Br	⁶⁹Br
36	⁷³Kr	⁶⁹Kr
37	⁷⁴Rb
38	⁷⁵Sr
39	⁷⁶Y
40	⁷⁷Zr