Tungsten-162

Properties and data of the isotope ¹⁶²W.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Tungsten isotopes (and general data sources).

General data

Name of the isotope:Tungsten-162; W-162Symbol:¹⁶²W or 16274WMass number A:162 (= number of nucleons)Atomic number Z:74 (= number of protons)Neutrons N:88Isotopic mass:161.963500(19) u (atomic weight of Tungsten-162)Nuclide mass:161.9229091 u (calculated nuclear mass without electrons)Mass excess:-33.99953 MeVMass defect:1.378064976 u (per nucleus)Nuclear binding energy:1283.65925675 MeV (per nucleus)
7.92382257 MeV (average binding energy per nucleon)Separation energy:S_N = 11.51(20) MeV (first neutron)
S_P = 2.51(3) MeV (first proton)Half-life:1.19(12) sDecay constant λ:0.58247662231928 s^-1Specific activity α:2.17873060076 × 10⁺²¹ Bq g^-1
58884610831.405 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1973

Radioactive Decay

Half-life T_½ = 1.19(12) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁵⁸Hf	45.2(16) %	5.6783(24) MeV
EC/β⁺	¹⁶²Ta	54.8(16) %	5.78(6) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁶Os.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 88) and isobaric (same nucleon number A = 162) with Tungsten-162. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 88	Isobar A = 162
49	¹³⁷In
50	¹³⁸Sn
51	¹³⁹Sb
52	¹⁴⁰Te
53	¹⁴¹I
54	¹⁴²Xe
55	¹⁴³Cs
56	¹⁴⁴Ba
57	¹⁴⁵La
58	¹⁴⁶Ce
59	¹⁴⁷Pr
60	¹⁴⁸Nd	¹⁶²Nd
61	¹⁴⁹Pm	¹⁶²Pm
62	¹⁵⁰Sm	¹⁶²Sm
63	¹⁵¹Eu	¹⁶²Eu
64	¹⁵²Gd	¹⁶²Gd
65	¹⁵³Tb	¹⁶²Tb
66	¹⁵⁴Dy	¹⁶²Dy
67	¹⁵⁵Ho	¹⁶²Ho
68	¹⁵⁶Er	¹⁶²Er
69	¹⁵⁷Tm	¹⁶²Tm
70	¹⁵⁸Yb	¹⁶²Yb
71	¹⁵⁹Lu	¹⁶²Lu
72	¹⁶⁰Hf	¹⁶²Hf
73	¹⁶¹Ta	¹⁶²Ta
74	¹⁶²W	¹⁶²W
75	¹⁶³Re	¹⁶²Re
76	¹⁶⁴Os	¹⁶²Os
77	¹⁶⁵Ir
78	¹⁶⁶Pt