Osmium-182m

Properties and data of the isotope ¹⁸²Os.

Content

General data

Name of the isotope:Osmium-182m; Os-182mSymbol:¹⁸²Os or 18276OsMass number A:182 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:106Isotopic mass:181.952110(23) u (atomic weight of Osmium-182m)
Excitation energy: 1831.4(3) keVNuclide mass:181.9104222 u (calculated nuclear mass without electrons)Mass excess:-44.60925 MeVMass defect:1.561073528 u (per nucleus)Nuclear binding energy:1454.13062489 MeV (per nucleus)
7.98972871 MeV (average binding energy per nucleon)Half-life:0.78(7) msDecay constant λ:0.88865023148711 s^-1Specific activity α:2.956672303442 × 10⁺²¹ Bq g^-1
79910062255.2 Ci g^-1Spin and parity:
(nuclear angular momentum)(8)-

Radioactive Decay

Half-life T_½ = 0.78(7) ms respectively 7.8 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁸²Os	100 %

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
¹⁸²Os		21.84(20) h	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 106) and isobaric (same nucleon number A = 182) with Osmium-182m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 106	Isobar A = 182
64	¹⁷⁰Gd
65	¹⁷¹Tb
66	¹⁷²Dy
67	¹⁷³Ho
68	¹⁷⁴Er
69	¹⁷⁵Tm
70	¹⁷⁶Yb	¹⁸²Yb
71	¹⁷⁷Lu	¹⁸²Lu
72	¹⁷⁸Hf	¹⁸²Hf
73	¹⁷⁹Ta	¹⁸²Ta
74	¹⁸⁰W	¹⁸²W
75	¹⁸¹Re	¹⁸²Re
76	¹⁸²Os	¹⁸²Os
77	¹⁸³Ir	¹⁸²Ir
78	¹⁸⁴Pt	¹⁸²Pt
79	¹⁸⁵Au	¹⁸²Au
80	¹⁸⁶Hg	¹⁸²Hg
81	¹⁸⁷Tl	¹⁸²Tl
82	¹⁸⁸Pb	¹⁸²Pb
83	¹⁸⁹Bi
84	¹⁹⁰Po
85	¹⁹¹At