Ruthenium-112

Properties and data of the isotope ¹¹²Ru.

Content

General data

Name of the isotope:Ruthenium-112; Ru-112Symbol:¹¹²Ru or 11244RuMass number A:112 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:68Isotopic mass:111.918807(10) u (atomic weight of Ruthenium-112)Nuclide mass:111.8946707 u (calculated nuclear mass without electrons)Mass excess:-75.63079 MeVMass defect:1.014708696 u (per nucleus)Nuclear binding energy:945.19506207 MeV (per nucleus)
8.43924163 MeV (average binding energy per nucleon)Separation energy:S_N = 6.917(13) MeV (first neutron)
S_P = 13.895(14) MeV (first proton)Half-life:1.75(7) sDecay constant λ:0.39608410317711 s^-1Specific activity α:2.148895731274 × 10⁺²¹ Bq g^-1
58078263007.408 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1970

Radioactive Decay

Half-life T_½ = 1.75(7) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹²Rh	100 %	4.10(5) MeV

Parent Nuclides

Direct parent isotope is: ¹¹²Tc.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 112) with Ruthenium-112. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 68	Isobar A = 112
38	¹⁰⁶Sr
39	¹⁰⁷Y
40	¹⁰⁸Zr	¹¹²Zr
41	¹⁰⁹Nb	¹¹²Nb
42	¹¹⁰Mo	¹¹²Mo
43	¹¹¹Tc	¹¹²Tc
44	¹¹²Ru	¹¹²Ru
45	¹¹³Rh	¹¹²Rh
46	¹¹⁴Pd	¹¹²Pd
47	¹¹⁵Ag	¹¹²Ag
48	¹¹⁶Cd	¹¹²Cd
49	¹¹⁷In	¹¹²In
50	¹¹⁸Sn	¹¹²Sn
51	¹¹⁹Sb	¹¹²Sb
52	¹²⁰Te	¹¹²Te
53	¹²¹I	¹¹²I
54	¹²²Xe	¹¹²Xe
55	¹²³Cs	¹¹²Cs
56	¹²⁴Ba
57	¹²⁵La
58	¹²⁶Ce
59	¹²⁷Pr
60	¹²⁸Nd
61	¹²⁹Pm
62	¹³⁰Sm
63	¹³¹Eu