Ruthenium-124

Properties and data of the isotope ¹²⁴Ru.

Content

General data

Name of the isotope:Ruthenium-124; Ru-124Symbol:¹²⁴Ru or 12444RuMass number A:124 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:80Isotopic mass:123.96354(64) u (atomic weight of Ruthenium-124)Nuclide mass:123.9394037 u (calculated nuclear mass without electrons)Mass excess:-33.96227 MeVMass defect:1.073954688 u (per nucleus)Nuclear binding energy:1000.38234814 MeV (per nucleus)
8.06759958 MeV (average binding energy per nucleon)Separation energy:S_N = 4.95(78) MeV (first neutron)Half-life:15(3) msDecay constant λ:46.20981203733 s^-1Specific activity α:2.262455261788 × 10⁺²³ Bq g^-1
6114743950780 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2010

Radioactive Decay

Half-life T_½ = 15(3) ms respectively 1.5 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹²⁴Rh		10.93(72) MeV
β^-, n	¹²³Rh	?	7.33(72) MeV
β^-, 2n	¹²²Rh	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 124) with Ruthenium-124. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 80	Isobar A = 124
44	¹²⁴Ru	¹²⁴Ru
45	¹²⁵Rh	¹²⁴Rh
46	¹²⁶Pd	¹²⁴Pd
47	¹²⁷Ag	¹²⁴Ag
48	¹²⁸Cd	¹²⁴Cd
49	¹²⁹In	¹²⁴In
50	¹³⁰Sn	¹²⁴Sn
51	¹³¹Sb	¹²⁴Sb
52	¹³²Te	¹²⁴Te
53	¹³³I	¹²⁴I
54	¹³⁴Xe	¹²⁴Xe
55	¹³⁵Cs	¹²⁴Cs
56	¹³⁶Ba	¹²⁴Ba
57	¹³⁷La	¹²⁴La
58	¹³⁸Ce	¹²⁴Ce
59	¹³⁹Pr	¹²⁴Pr
60	¹⁴⁰Nd	¹²⁴Nd
61	¹⁴¹Pm
62	¹⁴²Sm
63	¹⁴³Eu
64	¹⁴⁴Gd
65	¹⁴⁵Tb
66	¹⁴⁶Dy
67	¹⁴⁷Ho
68	¹⁴⁸Er
69	¹⁴⁹Tm
70	¹⁵⁰Yb
71	¹⁵¹Lu