Ruthenium-87

Properties and data of the isotope ⁸⁷Ru.

Content

General data

Name of the isotope:Ruthenium-87; Ru-87Symbol:⁸⁷Ru or 8744RuMass number A:87 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:43Isotopic mass:86.94918(64) u (atomic weight of Ruthenium-87)Nuclide mass:86.9250437 u (calculated nuclear mass without electrons)Mass excess:-47.33853 MeVMass defect:0.767712796 u (per nucleus)Nuclear binding energy:715.1198632 MeV (per nucleus)
8.21976854 MeV (average binding energy per nucleon)Half-life:> 1.5 μsDecay constant λ:462098.1203733 s^-1Specific activity α:3.235837176744 × 10⁺²⁷ Bq g^-1
8.745505883092 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)Mirror nucleus:Technetium-87Year of discovery:?

Radioactive Decay

Half-life T_½ = > 1.5 μs respectively 1.5 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁸⁷Tc

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 87) with Ruthenium-87. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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