Osmium-183m

Properties and data of the isotope ^183mOs.

Contents

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

General data

Name of the isotope:Osmium-183m; Os-183mSymbol:^183mOs or 183m76OsMass 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-183m)
Excitation energy: 170.73(7) keVNuclide 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)Half-life:9.9(3) hDecay constant λ:1.944857408978 × 10^-5 s^-1Specific activity α:6.435277620527 × 10⁺¹⁶ Bq g^-1
1739264.2217642 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-

Radioactive Decay

Half-life T_½ = 9.9(3) h (hours) respectively 3.5640 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁸³Re	85(2) %
Iso	¹⁸³Os	15(2) %

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
¹⁸³Os		13.0(5) h	9/2+

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-183m. 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