Osmium-162

Properties and data of the isotope ¹⁶²Os.

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-162; Os-162Symbol:¹⁶²Os or 16276OsMass number A:162 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:86Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.1315789473684 (= neutron-proton ratio)Neutron excess (N-Z):10Isotopic mass:161.98450(32) u (atomic weight of Osmium-162)Nuclide mass:161.9428122 u (calculated nuclear mass without electrons)Mass excess:-14.43816 MeVMass defect:1.355385208 u (per nucleus)Nuclear binding energy:1262.53318894 MeV (per nucleus)
7.79341475 MeV (average binding energy per nucleon)Separation energy:S_N = 12.53(50) MeV (first neutron)
S_P = 0.89(33) MeV (first proton)Half-life:2.1(1) msDecay constant λ:330.07008598093 s^-1Specific activity α:1.234614007098 × 10⁺²⁴ Bq g^-1
33367946137797 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1989

Radioactive Decay

Half-life T_½ = 2.1(1) ms respectively 2.1 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁵⁸W	ca. 99 %	6.767(3) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁶Pt.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 86) and isobaric (same nucleon number A = 162) with Osmium-162. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 86	Isobar A = 162
48	¹³⁴Cd
49	¹³⁵In
50	¹³⁶Sn
51	¹³⁷Sb
52	¹³⁸Te
53	¹³⁹I
54	¹⁴⁰Xe
55	¹⁴¹Cs
56	¹⁴²Ba
57	¹⁴³La
58	¹⁴⁴Ce
59	¹⁴⁵Pr
60	¹⁴⁶Nd	¹⁶²Nd
61	¹⁴⁷Pm	¹⁶²Pm
62	¹⁴⁸Sm	¹⁶²Sm
63	¹⁴⁹Eu	¹⁶²Eu
64	¹⁵⁰Gd	¹⁶²Gd
65	¹⁵¹Tb	¹⁶²Tb
66	¹⁵²Dy	¹⁶²Dy
67	¹⁵³Ho	¹⁶²Ho
68	¹⁵⁴Er	¹⁶²Er
69	¹⁵⁵Tm	¹⁶²Tm
70	¹⁵⁶Yb	¹⁶²Yb
71	¹⁵⁷Lu	¹⁶²Lu
72	¹⁵⁸Hf	¹⁶²Hf
73	¹⁵⁹Ta	¹⁶²Ta
74	¹⁶⁰W	¹⁶²W
75	¹⁶¹Re	¹⁶²Re
76	¹⁶²Os	¹⁶²Os