Osmium-179

Properties and data of the isotope ¹⁷⁹Os.

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-179; Os-179Symbol:¹⁷⁹Os or 17976OsMass number A:179 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:103Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3552631578947 (= neutron-proton ratio)Neutron excess (N-Z):27Isotopic mass:178.953817(18) u (atomic weight of Osmium-179)Nuclide mass:178.9121292 u (calculated nuclear mass without electrons)Mass excess:-43.01919 MeVMass defect:1.53337178 u (per nucleus)Nuclear binding energy:1428.32661284 MeV (per nucleus)
7.97947828 MeV (average binding energy per nucleon)Separation energy:S_N = 7.547(21) MeV (first neutron)
S_P = 4.66(3) MeV (first proton)Half-life:6.5(3) minDecay constant λ:0.0017773004629742 s^-1Specific activity α:6.013007718236 × 10⁺¹⁸ Bq g^-1
162513722.11451 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Year of discovery:1968

Radioactive Decay

Half-life T_½ = 6.5(3) min (minutes) respectively 3.90 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁷⁹Re	100 %	3.56(3) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸³Pt, ¹⁷⁹Ir.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 103) and isobaric (same nucleon number A = 179) with Osmium-179. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 103	Isobar A = 179
60	¹⁶³Nd
62	¹⁶⁵Sm
63	¹⁶⁶Eu
64	¹⁶⁷Gd
65	¹⁶⁸Tb
66	¹⁶⁹Dy
67	¹⁷⁰Ho
68	¹⁷¹Er
69	¹⁷²Tm	¹⁷⁹Tm
70	¹⁷³Yb	¹⁷⁹Yb
71	¹⁷⁴Lu	¹⁷⁹Lu
72	¹⁷⁵Hf	¹⁷⁹Hf
73	¹⁷⁶Ta	¹⁷⁹Ta
74	¹⁷⁷W	¹⁷⁹W
75	¹⁷⁸Re	¹⁷⁹Re
76	¹⁷⁹Os	¹⁷⁹Os
77	¹⁸⁰Ir	¹⁷⁹Ir
78	¹⁸¹Pt	¹⁷⁹Pt
79	¹⁸²Au	¹⁷⁹Au
80	¹⁸³Hg	¹⁷⁹Hg
81	¹⁸⁴Tl	¹⁷⁹Tl
82	¹⁸⁵Pb	¹⁷⁹Pb
83	¹⁸⁶Bi
84	¹⁸⁷Po
85	¹⁸⁸At