Ruthenium-105m

Properties and data of the isotope ^105mRu.

Content

General data

Name of the isotope:Ruthenium-105m; Ru-105Symbol:^105mRu or 105m44RuMass number A:105 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:61Isotopic mass:104.9077455(27) u (atomic weight of Ruthenium-105m)
Excitation energy: 20.610(13) keVNuclide mass:104.8836092 u (calculated nuclear mass without electrons)Mass excess:-85.93451 MeVMass defect:0.96511578400001 u (per nucleus)Nuclear binding energy:898.9995621 MeV (per nucleus)
8.56190059 MeV (average binding energy per nucleon)Half-life:340(15) nsDecay constant λ:2038668.1781175 s^-1Specific activity α:1.180494897624 × 10⁺²⁸ Bq g^-1
3.190526750336 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2)+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 105) with Ruthenium-105m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 61	Isobar A = 105
34	⁹⁵Se
35	⁹⁶Br
36	⁹⁷Kr
37	⁹⁸Rb
38	⁹⁹Sr	¹⁰⁵Sr
39	¹⁰⁰Y	¹⁰⁵Y
40	¹⁰¹Zr	¹⁰⁵Zr
41	¹⁰²Nb	¹⁰⁵Nb
42	¹⁰³Mo	¹⁰⁵Mo
43	¹⁰⁴Tc	¹⁰⁵Tc
44	¹⁰⁵Ru	¹⁰⁵Ru
45	¹⁰⁶Rh	¹⁰⁵Rh
46	¹⁰⁷Pd	¹⁰⁵Pd
47	¹⁰⁸Ag	¹⁰⁵Ag
48	¹⁰⁹Cd	¹⁰⁵Cd
49	¹¹⁰In	¹⁰⁵In
50	¹¹¹Sn	¹⁰⁵Sn
51	¹¹²Sb	¹⁰⁵Sb
52	¹¹³Te	¹⁰⁵Te
53	¹¹⁴I
54	¹¹⁵Xe
55	¹¹⁶Cs
56	¹¹⁷Ba
57	¹¹⁸La
58	¹¹⁹Ce