Osmium-183

Properties and data of the isotope ¹⁸³Os.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Osmium-183; Os-183Symbol:¹⁸³Os or 18376OsMass number A:183 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:107Isotopic mass:182.95312(5) u (atomic weight of Osmium-183)Nuclide mass:182.9114322 u (calculated nuclear mass without electrons)Mass excess:-43.66844 MeVMass defect:1.568728444 u (per nucleus)Nuclear binding energy:1461.26113322 MeV (per nucleus)
7.98503351 MeV (average binding energy per nucleon)Separation energy:S_N = 7.13(5) MeV (first neutron)
S_P = 5.51(11) MeV (first proton)Half-life:13.0(5) hDecay constant λ:1.481083719145 × 10^-5 s^-1Specific activity α:4.900711418709 × 10⁺¹⁶ Bq g^-1
1324516.5996512 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = -0.794(14)Quadrupole moment Q:+3.12(27) barn (100 fm²)Nuclear g-factor:g_l = -0.17644444444444Year of discovery:1950

Radioactive Decay

Half-life T_½ = 13.0(5) h (hours) respectively 4.6800 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁸³Re	100 %	2.15(5) MeV

Parent Nuclides

Direct parent isotope is: ¹⁸³Ir.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^183mOs	170.73(7) keV	9.9(3) h	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 183) with Osmium-183. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 107	Isobar A = 183
65	¹⁷²Tb
66	¹⁷³Dy
67	¹⁷⁴Ho
68	¹⁷⁵Er
69	¹⁷⁶Tm
70	¹⁷⁷Yb	¹⁸³Yb
71	¹⁷⁸Lu	¹⁸³Lu
72	¹⁷⁹Hf	¹⁸³Hf
73	¹⁸⁰Ta	¹⁸³Ta
74	¹⁸¹W	¹⁸³W
75	¹⁸²Re	¹⁸³Re
76	¹⁸³Os	¹⁸³Os
77	¹⁸⁴Ir	¹⁸³Ir
78	¹⁸⁵Pt	¹⁸³Pt
79	¹⁸⁶Au	¹⁸³Au
80	¹⁸⁷Hg	¹⁸³Hg
81	¹⁸⁸Tl	¹⁸³Tl
82	¹⁸⁹Pb	¹⁸³Pb
83	¹⁹⁰Bi
84	¹⁹¹Po
85	¹⁹²At
86	¹⁹³Rn