Ruthenium-119

Properties and data of the isotope ¹¹⁹Ru.

Content

General data

Name of the isotope:Ruthenium-119; Ru-119Symbol:¹¹⁹Ru or 11944RuMass number A:119 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:75Isotopic mass:118.94357(32) u (atomic weight of Ruthenium-119)Nuclide mass:118.9194337 u (calculated nuclear mass without electrons)Mass excess:-52.56421 MeVMass defect:1.050600108 u (per nucleus)Nuclear binding energy:978.627697 MeV (per nucleus)
8.22376216 MeV (average binding energy per nucleon)Separation energy:S_N = 3.38(36) MeV (first neutron)
S_P = 16.06(50) MeV (first proton)Half-life:69.5(20) msDecay constant λ:9.9733407274812 s^-1Specific activity α:5.089903619070 × 10⁺²² Bq g^-1
1375649626775.9 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1997

Radioactive Decay

Half-life T_½ = 69.5(20) ms respectively 6.95 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹¹⁹Rh		10.26(30) MeV
β^-, n		?	4.25(30) MeV
β^-, 2n		?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 75) and isobaric (same nucleon number A = 119) with Ruthenium-119. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 75	Isobar A = 119
42	¹¹⁷Mo
43	¹¹⁸Tc	¹¹⁹Tc
44	¹¹⁹Ru	¹¹⁹Ru
45	¹²⁰Rh	¹¹⁹Rh
46	¹²¹Pd	¹¹⁹Pd
47	¹²²Ag	¹¹⁹Ag
48	¹²³Cd	¹¹⁹Cd
49	¹²⁴In	¹¹⁹In
50	¹²⁵Sn	¹¹⁹Sn
51	¹²⁶Sb	¹¹⁹Sb
52	¹²⁷Te	¹¹⁹Te
53	¹²⁸I	¹¹⁹I
54	¹²⁹Xe	¹¹⁹Xe
55	¹³⁰Cs	¹¹⁹Cs
56	¹³¹Ba	¹¹⁹Ba
57	¹³²La	¹¹⁹La
58	¹³³Ce	¹¹⁹Ce
59	¹³⁴Pr
60	¹³⁵Nd
61	¹³⁶Pm
62	¹³⁷Sm
63	¹³⁸Eu
64	¹³⁹Gd
65	¹⁴⁰Tb
66	¹⁴¹Dy
67	¹⁴²Ho
68	¹⁴³Er
69	¹⁴⁴Tm