Germanium-84

Properties and data of the isotope ⁸⁴Ge.

Content

General data

Name of the isotope:Germanium-84; Ge-84Symbol:⁸⁴Ge or 8432GeMass number A:84 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:52Isotopic mass:83.937575(3) u (atomic weight of Germanium-84)Nuclide mass:83.920021 u (calculated nuclear mass without electrons)Mass excess:-58.14851 MeVMass defect:0.763401656 u (per nucleus)Nuclear binding energy:711.10406215 MeV (per nucleus)
8.46552455 MeV (average binding energy per nucleon)Separation energy:S_N = 5.243(4) MeV (first neutron)
S_P = 16.180(4) MeV (first proton)Half-life:954(14) msDecay constant λ:0.72656937165613 s^-1Specific activity α:5.271690482685 × 10⁺²¹ Bq g^-1
142478121153.66 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1972

Radioactive Decay

Half-life T_½ = 954(14) ms respectively 9.54 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁸⁴As	89.8 %	7.705(4) MeV
β^-, n	⁸³As	10.2(9) %	3.450(4) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 52) and isobaric (same nucleon number A = 84) with Germanium-84. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 52	Isobar A = 84
28	⁸⁰Ni
29	⁸¹Cu
30	⁸²Zn	⁸⁴Zn
31	⁸³Ga	⁸⁴Ga
32	⁸⁴Ge	⁸⁴Ge
33	⁸⁵As	⁸⁴As
34	⁸⁶Se	⁸⁴Se
35	⁸⁷Br	⁸⁴Br
36	⁸⁸Kr	⁸⁴Kr
37	⁸⁹Rb	⁸⁴Rb
38	⁹⁰Sr	⁸⁴Sr
39	⁹¹Y	⁸⁴Y
40	⁹²Zr	⁸⁴Zr
41	⁹³Nb	⁸⁴Nb
42	⁹⁴Mo	⁸⁴Mo
43	⁹⁵Tc
44	⁹⁶Ru
45	⁹⁷Rh
46	⁹⁸Pd
47	⁹⁹Ag
48	¹⁰⁰Cd
49	¹⁰¹In
50	¹⁰²Sn
51	¹⁰³Sb