Tantalum-167

Properties and data of the isotope ¹⁶⁷Ta.

Content

General data

Name of the isotope:Tantalum-167; Ta-167Symbol:¹⁶⁷Ta or 16773TaMass number A:167 (= number of nucleons)Atomic number Z:73 (= number of protons)Neutrons N:94Isotopic mass:166.94809(3) u (atomic weight of Tantalum-167)Nuclide mass:166.9080476 u (calculated nuclear mass without electrons)Mass excess:-48.35385 MeVMass defect:1.43763944 u (per nucleus)Nuclear binding energy:1339.15251252 MeV (per nucleus)
8.01887732 MeV (average binding energy per nucleon)Separation energy:S_N = 10.32(4) MeV (first neutron)
S_P = 1.78(4) MeV (first proton)Half-life:80(4) sDecay constant λ:0.0086643397569993 s^-1Specific activity α:3.143245450301 × 10⁺¹⁹ Bq g^-1
849525797.3787 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2+)Year of discovery:1982

Radioactive Decay

Half-life T_½ = 80(4) s respectively 8.0 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁶⁷Hf	100 %	5.12(4) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁷W.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 94) and isobaric (same nucleon number A = 167) with Tantalum-167. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 94	Isobar A = 167
54	¹⁴⁸Xe
55	¹⁴⁹Cs
56	¹⁵⁰Ba
57	¹⁵¹La
58	¹⁵²Ce
59	¹⁵³Pr
60	¹⁵⁴Nd
61	¹⁵⁵Pm
62	¹⁵⁶Sm
63	¹⁵⁷Eu	¹⁶⁷Eu
64	¹⁵⁸Gd	¹⁶⁷Gd
65	¹⁵⁹Tb	¹⁶⁷Tb
66	¹⁶⁰Dy	¹⁶⁷Dy
67	¹⁶¹Ho	¹⁶⁷Ho
68	¹⁶²Er	¹⁶⁷Er
69	¹⁶³Tm	¹⁶⁷Tm
70	¹⁶⁴Yb	¹⁶⁷Yb
71	¹⁶⁵Lu	¹⁶⁷Lu
72	¹⁶⁶Hf	¹⁶⁷Hf
73	¹⁶⁷Ta	¹⁶⁷Ta
74	¹⁶⁸W	¹⁶⁷W
75	¹⁶⁹Re	¹⁶⁷Re
76	¹⁷⁰Os	¹⁶⁷Os
77	¹⁷¹Ir	¹⁶⁷Ir
78	¹⁷²Pt	¹⁶⁷Pt
79	¹⁷³Au
80	¹⁷⁴Hg