Tungsten-176

Properties and data of the isotope ¹⁷⁶W.

Contents

General data

Name of the isotope:Tungsten-176; W-176Symbol:¹⁷⁶W or 17674WMass number A:176 (= number of nucleons)Atomic number Z:74 (= number of protons)Neutrons N:102Isotopic mass:175.94563(3) u (atomic weight of Tungsten-176)Nuclide mass:175.9050391 u (calculated nuclear mass without electrons)Mass excess:-50.64533 MeVMass defect:1.5172438 u (per nucleus)Nuclear binding energy:1413.30349624 MeV (per nucleus)
8.0301335 MeV (average binding energy per nucleon)Separation energy:S_N = 9.08(4) MeV (first neutron)
S_P = 5.52(4) MeV (first proton)Half-life:2.5(1) hDecay constant λ:7.701635339554 × 10^-5 s^-1Specific activity α:2.650304735238 × 10⁺¹⁷ Bq g^-1
7162985.7709138 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1950

Radioactive Decay

Half-life T_½ = 2.5(1) h (hours) respectively 9.0 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁷⁶Ta	100 %	0.72(4) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁶Re.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 176) with Tungsten-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 102	Isobar A = 176
60	¹⁶²Nd
61	¹⁶³Pm
62	¹⁶⁴Sm
63	¹⁶⁵Eu
64	¹⁶⁶Gd
65	¹⁶⁷Tb
66	¹⁶⁸Dy
67	¹⁶⁹Ho
68	¹⁷⁰Er	¹⁷⁶Er
69	¹⁷¹Tm	¹⁷⁶Tm
70	¹⁷²Yb	¹⁷⁶Yb
71	¹⁷³Lu	¹⁷⁶Lu
72	¹⁷⁴Hf	¹⁷⁶Hf
73	¹⁷⁵Ta	¹⁷⁶Ta
74	¹⁷⁶W	¹⁷⁶W
75	¹⁷⁷Re	¹⁷⁶Re
76	¹⁷⁸Os	¹⁷⁶Os
77	¹⁷⁹Ir	¹⁷⁶Ir
78	¹⁸⁰Pt	¹⁷⁶Pt
79	¹⁸¹Au	¹⁷⁶Au
80	¹⁸²Hg	¹⁷⁶Hg
81	¹⁸³Tl	¹⁷⁶Tl
82	¹⁸⁴Pb
83	¹⁸⁵Bi
84	¹⁸⁶Po