Osmium-194

Properties and data of the isotope ¹⁹⁴Os.

Contents

See also: List of individual Osmium isotopes (and general data sources).

General data

Name of the isotope:Osmium-194; Os-194Symbol:¹⁹⁴Os or 19476OsMass number A:194 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:118Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5526315789474 (= neutron-proton ratio)Neutron excess (N-Z):42Isotopic mass:193.9651795(26) u (atomic weight of Osmium-194)Nuclide mass:193.9234917 u (calculated nuclear mass without electrons)Mass excess:-32.43509 MeVMass defect:1.65198302 u (per nucleus)Nuclear binding energy:1538.81227123 MeV (per nucleus)
7.93202202 MeV (average binding energy per nucleon)Separation energy:S_N = 7.112(3) MeV (first neutron)
S_P = 9.49(4) MeV (first proton)Half-life:6.0(2) aDecay constant λ:3.663568607610 × 10^-9 s^-1Specific activity α:11431360728018 Bq g^-1
308.95569535184 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1951

Radioactive Decay

Half-life T_½ = 6.0(2) a respectively 1.892 × 10⁸ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁹⁴Ir	100 %	0.0966(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 118) and isobaric (same nucleon number A = 194) with Osmium-194. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 118	Isobar A = 194
72	¹⁹⁰Hf
73	¹⁹¹Ta	¹⁹⁴Ta
74	¹⁹²W	¹⁹⁴W
75	¹⁹³Re	¹⁹⁴Re
76	¹⁹⁴Os	¹⁹⁴Os
77	¹⁹⁵Ir	¹⁹⁴Ir
78	¹⁹⁶Pt	¹⁹⁴Pt
79	¹⁹⁷Au	¹⁹⁴Au
80	¹⁹⁸Hg	¹⁹⁴Hg
81	¹⁹⁹Tl	¹⁹⁴Tl
82	²⁰⁰Pb	¹⁹⁴Pb
83	²⁰¹Bi	¹⁹⁴Bi
84	²⁰²Po	¹⁹⁴Po
85	²⁰³At	¹⁹⁴At
86	²⁰⁴Rn	¹⁹⁴Rn
87	²⁰⁵Fr
88	²⁰⁶Ra
89	²⁰⁷Ac
90	²⁰⁸Th