Tantalum-163

Properties and data of the isotope ¹⁶³Ta.

Content

General data

Name of the isotope:Tantalum-163; Ta-163Symbol:¹⁶³Ta or 16373TaMass number A:163 (= number of nucleons)Atomic number Z:73 (= number of protons)Neutrons N:90Isotopic mass:162.95434(4) u (atomic weight of Tantalum-163)Nuclide mass:162.9142976 u (calculated nuclear mass without electrons)Mass excess:-42.53202 MeVMass defect:1.396729776 u (per nucleus)Nuclear binding energy:1301.04540597 MeV (per nucleus)
7.98187366 MeV (average binding energy per nucleon)Separation energy:S_N = 10.83(6) MeV (first neutron)
S_P = 0.65(4) MeV (first proton)Half-life:10.6(18) sDecay constant λ:0.065391243449051 s^-1Specific activity α:2.43083505590 × 10⁺²⁰ Bq g^-1
6569824475.4189 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1985

Radioactive Decay

Half-life T_½ = 10.6(18) s respectively 1.06 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁵⁹Lu	ca. 0.2 %	4.749(5) MeV
EE/β⁺	¹⁶³Hf	ca. 99.8 %	6.73(5) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁷Re.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 163) with Tantalum-163. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 90	Isobar A = 163
51	¹⁴¹Sb
52	¹⁴²Te
53	¹⁴³I
54	¹⁴⁴Xe
55	¹⁴⁵Cs
56	¹⁴⁶Ba
57	¹⁴⁷La
58	¹⁴⁸Ce
59	¹⁴⁹Pr
60	¹⁵⁰Nd	¹⁶³Nd
61	¹⁵¹Pm	¹⁶³Pm
62	¹⁵²Sm	¹⁶³Sm
63	¹⁵³Eu	¹⁶³Eu
64	¹⁵⁴Gd	¹⁶³Gd
65	¹⁵⁵Tb	¹⁶³Tb
66	¹⁵⁶Dy	¹⁶³Dy
67	¹⁵⁷Ho	¹⁶³Ho
68	¹⁵⁸Er	¹⁶³Er
69	¹⁵⁹Tm	¹⁶³Tm
70	¹⁶⁰Yb	¹⁶³Yb
71	¹⁶¹Lu	¹⁶³Lu
72	¹⁶²Hf	¹⁶³Hf
73	¹⁶³Ta	¹⁶³Ta
74	¹⁶⁴W	¹⁶³W
75	¹⁶⁵Re	¹⁶³Re
76	¹⁶⁶Os	¹⁶³Os
77	¹⁶⁷Ir
78	¹⁶⁸Pt