Osmium-180

Properties and data of the isotope ¹⁸⁰Os.

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-180; Os-180Symbol:¹⁸⁰Os or 18076OsMass number A:180 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:104Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3684210526316 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:179.952380(18) u (atomic weight of Osmium-180)Nuclide mass:179.9106922 u (calculated nuclear mass without electrons)Mass excess:-44.35774 MeVMass defect:1.543473696 u (per nucleus)Nuclear binding energy:1437.73648698 MeV (per nucleus)
7.98742493 MeV (average binding energy per nucleon)Separation energy:S_N = 9.41(23) MeV (first neutron)
S_P = 5.06(3) MeV (first proton)Half-life:21.5(4) minDecay constant λ:0.0005373233957829 s^-1Specific activity α:1.807730266337 × 10⁺¹⁸ Bq g^-1
48857574.765878 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1967

Radioactive Decay

Half-life T_½ = 21.5(4) min (minutes) respectively 1.290 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁸⁰Re	100 %	1.48(27) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸⁴Pt, ¹⁸⁰Ir.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 104) and isobaric (same nucleon number A = 180) with Osmium-180. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 104	Isobar A = 180
62	¹⁶⁶Sm
63	¹⁶⁷Eu
64	¹⁶⁸Gd
65	¹⁶⁹Tb
66	¹⁷⁰Dy
67	¹⁷¹Ho
68	¹⁷²Er
69	¹⁷³Tm
70	¹⁷⁴Yb	¹⁸⁰Yb
71	¹⁷⁵Lu	¹⁸⁰Lu
72	¹⁷⁶Hf	¹⁸⁰Hf
73	¹⁷⁷Ta	¹⁸⁰Ta
74	¹⁷⁸W	¹⁸⁰W
75	¹⁷⁹Re	¹⁸⁰Re
76	¹⁸⁰Os	¹⁸⁰Os
77	¹⁸¹Ir	¹⁸⁰Ir
78	¹⁸²Pt	¹⁸⁰Pt
79	¹⁸³Au	¹⁸⁰Au
80	¹⁸⁴Hg	¹⁸⁰Hg
81	¹⁸⁵Tl	¹⁸⁰Tl
82	¹⁸⁶Pb	¹⁸⁰Pb
83	¹⁸⁷Bi
84	¹⁸⁸Po
85	¹⁸⁹At