Osmium-176

Properties and data of the isotope ¹⁷⁶Os.

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-176; Os-176Symbol:¹⁷⁶Os or 17676OsMass number A:176 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:100Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3157894736842 (= neutron-proton ratio)Neutron excess (N-Z):24Isotopic mass:17595481(3) u (atomic weight of Osmium-176)Nuclide mass:17595480.958312 u (calculated nuclear mass without electrons)Mass excess:-42.09421 MeVMass defect:1.506384032 u (per nucleus)Nuclear binding energy:1403.1876875 MeV (per nucleus)
7.97265732 MeV (average binding energy per nucleon)Separation energy:S_N = 10.06(3) MeV (first neutron)
S_P = 4.10(4) MeV (first proton)Half-life:3.6(5) minDecay constant λ:0.0032090147248146 s^-1Specific activity α:1.104293639682 × 10⁺¹⁹ Bq g^-1
298457740.45473 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1970

Radioactive Decay

Half-life T_½ = 3.6(5) min (minutes) respectively 2.16 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁷⁶Re	100 %	2.96(4) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸⁰Pt, ¹⁷⁶Ir.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 100) and isobaric (same nucleon number A = 176) with Osmium-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 100	Isobar A = 176
58	¹⁵⁸Ce
59	¹⁵⁹Pr
60	¹⁶⁰Nd
61	¹⁶¹Pm
62	¹⁶²Sm
63	¹⁶³Eu
64	¹⁶⁴Gd
65	¹⁶⁵Tb
66	¹⁶⁶Dy
67	¹⁶⁷Ho
68	¹⁶⁸Er	¹⁷⁶Er
69	¹⁶⁹Tm	¹⁷⁶Tm
70	¹⁷⁰Yb	¹⁷⁶Yb
71	¹⁷¹Lu	¹⁷⁶Lu
72	¹⁷²Hf	¹⁷⁶Hf
73	¹⁷³Ta	¹⁷⁶Ta
74	¹⁷⁴W	¹⁷⁶W
75	¹⁷⁵Re	¹⁷⁶Re
76	¹⁷⁶Os	¹⁷⁶Os
77	¹⁷⁷Ir	¹⁷⁶Ir
78	¹⁷⁸Pt	¹⁷⁶Pt
79	¹⁷⁹Au	¹⁷⁶Au
80	¹⁸⁰Hg	¹⁷⁶Hg
81	¹⁸¹Tl	¹⁷⁶Tl
82	¹⁸²Pb