Germanium-75

Properties and data of the isotope ⁷⁵Ge.

Content

General data

Name of the isotope:Germanium-75; Ge-75Symbol:⁷⁵Ge or 7532GeMass number A:75 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:43Isotopic mass:74.92285837(5) u (atomic weight of Germanium-75)Nuclide mass:74.9053044 u (calculated nuclear mass without electrons)Mass excess:-71.85697 MeVMass defect:0.700134042 u (per nucleus)Nuclear binding energy:652.17065932 MeV (per nucleus)
8.69560879 MeV (average binding energy per nucleon)Separation energy:S_N = 6.50584(5) MeV (first neutron)
S_P = 11.096(3) MeV (first proton)Half-life:82.78(4) minDecay constant λ:0.00013955608853989 s^-1Specific activity α:1.135711382498 × 10⁺¹⁸ Bq g^-1
30694902.229695 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = + 0.509(5)Nuclear g-factor:g_l = 1.018Year of discovery:1939

Radioactive Decay

Half-life T_½ = 82.78(4) min (minutes) respectively 4.9668 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷⁵As	100 %	11.772(9) MeV

Parent Nuclides

Direct parent isotope is: ⁷⁵Ga.

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
^75m1Ge	139.69(3) KeV	47.7(5) s	7/2+
^75m2Ge	192.19(6) keV	216(5) ns	5/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 75) with Germanium-75. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 43	Isobar A = 75
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn
26	⁶⁹Fe
27	⁷⁰Co	⁷⁵Co
28	⁷¹Ni	⁷⁵Ni
29	⁷²Cu	⁷⁵Cu
30	⁷³Zn	⁷⁵Zn
31	⁷⁴Ga	⁷⁵Ga
32	⁷⁵Ge	⁷⁵Ge
33	⁷⁶As	⁷⁵As
34	⁷⁷Se	⁷⁵Se
35	⁷⁸Br	⁷⁵Br
36	⁷⁹Kr	⁷⁵Kr
37	⁸⁰Rb	⁷⁵Rb
38	⁸¹Sr	⁷⁵Sr
39	⁸²Y
40	⁸³Zr
41	⁸⁴Nb
42	⁸⁵Mo
43	⁸⁶Tc
44	⁸⁷Ru