Tantalum-176

Properties and data of the isotope ¹⁷⁶Ta.

Contents

General data

Name of the isotope:Tantalum-176; Ta-176Symbol:¹⁷⁶Ta or 17673TaMass number A:176 (= number of nucleons)Atomic number Z:73 (= number of protons)Neutrons N:103Isotopic mass:175.94486(3) u (atomic weight of Tantalum-176)Nuclide mass:175.9048176 u (calculated nuclear mass without electrons)Mass excess:-51.36258 MeVMass defect:1.518853684 u (per nucleus)Nuclear binding energy:1414.80309352 MeV (per nucleus)
8.03865394 MeV (average binding energy per nucleon)Separation energy:S_N = 7.03(4) MeV (first neutron)
S_P = 4.17(3) MeV (first proton)Half-life:8.09(5) hDecay constant λ:2.379986198873 × 10^-5 s^-1Specific activity α:8.190064076755 × 10⁺¹⁶ Bq g^-1
2213530.8315555 Ci g^-1Spin and parity:
(nuclear angular momentum)(1)-Year of discovery:1948

Radioactive Decay

Half-life T_½ = 8.09(5) h (hours) respectively 2.9124 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁷⁶Hf	100 %	3.21(3) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁶W.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 103) and isobaric (same nucleon number A = 176) with Tantalum-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 103	Isobar A = 176
60	¹⁶³Nd
62	¹⁶⁵Sm
63	¹⁶⁶Eu
64	¹⁶⁷Gd
65	¹⁶⁸Tb
66	¹⁶⁹Dy
67	¹⁷⁰Ho
68	¹⁷¹Er	¹⁷⁶Er
69	¹⁷²Tm	¹⁷⁶Tm
70	¹⁷³Yb	¹⁷⁶Yb
71	¹⁷⁴Lu	¹⁷⁶Lu
72	¹⁷⁵Hf	¹⁷⁶Hf
73	¹⁷⁶Ta	¹⁷⁶Ta
74	¹⁷⁷W	¹⁷⁶W
75	¹⁷⁸Re	¹⁷⁶Re
76	¹⁷⁹Os	¹⁷⁶Os
77	¹⁸⁰Ir	¹⁷⁶Ir
78	¹⁸¹Pt	¹⁷⁶Pt
79	¹⁸²Au	¹⁷⁶Au
80	¹⁸³Hg	¹⁷⁶Hg
81	¹⁸⁴Tl	¹⁷⁶Tl
82	¹⁸⁵Pb
83	¹⁸⁶Bi
84	¹⁸⁷Po