Tungsten-184

Properties and data of the isotope ¹⁸⁴W.

Contents

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

General data

Name of the isotope:Tungsten-184; W-184Symbol:¹⁸⁴W or 18474WMass number A:184 (= number of nucleons)Atomic number Z:74 (= number of protons)Neutrons N:110Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4864864864865 (= neutron-proton ratio)Neutron excess (N-Z):36Isotopic mass:183.950931(6) u (atomic weight of Tungsten-184)Nuclide mass:183.9103401 u (calculated nuclear mass without electrons)Mass excess:-45.70748 MeVMass defect:1.581262128 u (per nucleus)Nuclear binding energy:1472.93618466 MeV (per nucleus)
8.00508796 MeV (average binding energy per nucleon)Separation energy:S_N = 7.41111(13) MeV (first neutron)
S_P = 7.7009(15) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.3658(23) femtometer fmYear of discovery:1930

Parent Nuclides

Direct parent isotopes are: ¹⁸⁴Re, ¹⁸⁴Ta.

Occurrence

Comparison of the natural Tungsten isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Tungsten Isotopic mixture	183.84 u	100 %
Isotope ¹⁸⁰W	179.94671(2) u	0.12(1) %	1.8(2) × 10¹⁸ a	0+
Isotope ¹⁸²W	181.948204(6) u	26.50(16) %	stable	0+
Isotope ¹⁸³W	182.950223(6) u	14.31(4) %	6.7 × 10²⁰ a	1/2-
Isotope ¹⁸⁴W	183.950931(6) u	30.64(2) %	stable	0+
Isotope ¹⁸⁶W	185.95436(2) u	28.43(19) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 184) with Tungsten-184. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 110	Isobar A = 184
69	¹⁷⁹Tm
70	¹⁸⁰Yb	¹⁸⁴Yb
71	¹⁸¹Lu	¹⁸⁴Lu
72	¹⁸²Hf	¹⁸⁴Hf
73	¹⁸³Ta	¹⁸⁴Ta
74	¹⁸⁴W	¹⁸⁴W
75	¹⁸⁵Re	¹⁸⁴Re
76	¹⁸⁶Os	¹⁸⁴Os
77	¹⁸⁷Ir	¹⁸⁴Ir
78	¹⁸⁸Pt	¹⁸⁴Pt
79	¹⁸⁹Au	¹⁸⁴Au
80	¹⁹⁰Hg	¹⁸⁴Hg
81	¹⁹¹Tl	¹⁸⁴Tl
82	¹⁹²Pb	¹⁸⁴Pb
83	¹⁹³Bi	¹⁸⁴Bi
84	¹⁹⁴Po
85	¹⁹⁵At
86	¹⁹⁶Rn