Ruthenium-88

Properties and data of the isotope ⁸⁸Ru.

Content

General data

Name of the isotope:Ruthenium-88; Ru-88Symbol:⁸⁸Ru or 8844RuMass number A:88 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:44Isotopic mass:87.94166(32) u (atomic weight of Ruthenium-88)Nuclide mass:87.9175237 u (calculated nuclear mass without electrons)Mass excess:-54.34336 MeVMass defect:0.78389771200001 u (per nucleus)Nuclear binding energy:730.19601534 MeV (per nucleus)
8.29768199 MeV (average binding energy per nucleon)Separation energy:S_N = 16.89(50) MeV (first neutron)
S_P = 3.94(30) MeV (first proton)Half-life:1.2 sDecay constant λ:0.57762265046662 s^-1Specific activity α:3.998304557471 × 10⁺²¹ Bq g^-1
108062285337.06 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1994

Radioactive Decay

Half-life T_½ = 1.2 s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁸⁸Tc	100 %	7.34(33) MeV
EE, p	⁸⁷Mo	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 88) with Ruthenium-88. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 44	Isobar A = 88
23	⁶⁷V
24	⁶⁸Cr
25	⁶⁹Mn
26	⁷⁰Fe
27	⁷¹Co
28	⁷²Ni
29	⁷³Cu
30	⁷⁴Zn
31	⁷⁵Ga
32	⁷⁶Ge	⁸⁸Ge
33	⁷⁷As	⁸⁸As
34	⁷⁸Se	⁸⁸Se
35	⁷⁹Br	⁸⁸Br
36	⁸⁰Kr	⁸⁸Kr
37	⁸¹Rb	⁸⁸Rb
38	⁸²Sr	⁸⁸Sr
39	⁸³Y	⁸⁸Y
40	⁸⁴Zr	⁸⁸Zr
41	⁸⁵Nb	⁸⁸Nb
42	⁸⁶Mo	⁸⁸Mo
43	⁸⁷Tc	⁸⁸Tc
44	⁸⁸Ru	⁸⁸Ru
45	⁸⁹Rh
46	⁹⁰Pd