Ruthenium-94

Properties and data of the isotope ⁹⁴Ru.

Content

General data

Name of the isotope:Ruthenium-94; Ru-94Symbol:⁹⁴Ru or 9444RuMass number A:94 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:50Isotopic mass:93.911343(3) u (atomic weight of Ruthenium-94)Nuclide mass:93.8872067 u (calculated nuclear mass without electrons)Mass excess:-82.58346 MeVMass defect:0.866204208 u (per nucleus)Nuclear binding energy:806.86402253 MeV (per nucleus)
8.58365981 MeV (average binding energy per nucleon)Separation energy:S_N = 13.438(4) MeV (first neutron)
S_P = 6.266(3) MeV (first proton)Half-life:51.8(6) minDecay constant λ:0.00022302032836549 s^-1Specific activity α:1.444150357039 × 10⁺¹⁸ Bq g^-1
39031090.730786 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1952

Radioactive Decay

Half-life T_½ = 51.8(6) min (minutes) respectively 3.108 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE	⁹⁴Tc	100 %	1.575(5) MeV

Parent Nuclides

Direct parent isotopes are: ⁹⁴Rh, ⁹⁵Pd.

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
^94mRu	2644.1(4) keV	71(4) μ s	8+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 50) and isobaric (same nucleon number A = 94) with Ruthenium-94. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 50	Isobar A = 94
28	⁷⁸Ni
29	⁷⁹Cu
30	⁸⁰Zn
31	⁸¹Ga
32	⁸²Ge
33	⁸³As
34	⁸⁴Se	⁹⁴Se
35	⁸⁵Br	⁹⁴Br
36	⁸⁶Kr	⁹⁴Kr
37	⁸⁷Rb	⁹⁴Rb
38	⁸⁸Sr	⁹⁴Sr
39	⁸⁹Y	⁹⁴Y
40	⁹⁰Zr	⁹⁴Zr
41	⁹¹Nb	⁹⁴Nb
42	⁹²Mo	⁹⁴Mo
43	⁹³Tc	⁹⁴Tc
44	⁹⁴Ru	⁹⁴Ru
45	⁹⁵Rh	⁹⁴Rh
46	⁹⁶Pd	⁹⁴Pd
47	⁹⁷Ag	⁹⁴Ag
48	⁹⁸Cd	⁹⁴Cd
49	⁹⁹In
50	¹⁰⁰Sn