Ruthenium-93

Properties and data of the isotope ⁹³Ru.

Content

General data

Name of the isotope:Ruthenium-93; Ru-93Symbol:⁹³Ru or 9344RuMass number A:93 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:49Isotopic mass:92.9171044(22) u (atomic weight of Ruthenium-93)Nuclide mass:92.8929681 u (calculated nuclear mass without electrons)Mass excess:-77.21675 MeVMass defect:0.851777892 u (per nucleus)Nuclear binding energy:793.42599573 MeV (per nucleus)
8.53146232 MeV (average binding energy per nucleon)Separation energy:S_N = 10.987(3) MeV (first neutron)
S_P = 5.580(4) MeV (first proton)Half-life:59.7(6) sDecay constant λ:0.011610505537018 s^-1Specific activity α:7.600010847716 × 10⁺¹⁹ Bq g^-1
2054056985.8694 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2)+Year of discovery:1972

Radioactive Decay

Half-life T_½ = 59.7(6) s respectively 5.97 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁹³Tc	100 %	6.3894(23) MeV

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
^93m1Ru	734.40(10) keV	10.8(3) s	(1/2)-
^93m2Ru	2085.5(9) keV	2.49(15) μs	(21/2)+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 93) with Ruthenium-93. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 49	Isobar A = 93
27	⁷⁶Co
28	⁷⁷Ni
29	⁷⁸Cu
30	⁷⁹Zn
31	⁸⁰Ga
32	⁸¹Ge
33	⁸²As
34	⁸³Se	⁹³Se
35	⁸⁴Br	⁹³Br
36	⁸⁵Kr	⁹³Kr
37	⁸⁶Rb	⁹³Rb
38	⁸⁷Sr	⁹³Sr
39	⁸⁸Y	⁹³Y
40	⁸⁹Zr	⁹³Zr
41	⁹⁰Nb	⁹³Nb
42	⁹¹Mo	⁹³Mo
43	⁹²Tc	⁹³Tc
44	⁹³Ru	⁹³Ru
45	⁹⁴Rh	⁹³Rh
46	⁹⁵Pd	⁹³Pd
47	⁹⁶Ag	⁹³Ag
48	⁹⁷Cd
49	⁹⁸In
50	⁹⁹Sn