Tantalum-174

Properties and data of the isotope ¹⁷⁴Ta.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Tantalum-174; Ta-174Symbol:¹⁷⁴Ta or 17473TaMass number A:174 (= number of nucleons)Atomic number Z:73 (= number of protons)Neutrons N:101Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3835616438356 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:173.94445(3) u (atomic weight of Tantalum-174)Nuclide mass:173.9044076 u (calculated nuclear mass without electrons)Mass excess:-51.74449 MeVMass defect:1.501933852 u (per nucleus)Nuclear binding energy:1399.04237153 MeV (per nucleus)
8.0404734 MeV (average binding energy per nucleon)Separation energy:S_N = 7.42(4) MeV (first neutron)
S_P = 3.62(4) MeV (first proton)Half-life:1.14(8) hDecay constant λ:0.00016889551183235 s^-1Specific activity α:5.879263369164 × 10⁺¹⁷ Bq g^-1
15889900.997742 Ci g^-1Spin and parity:
(nuclear angular momentum)3+Year of discovery:1960

Radioactive Decay

Half-life T_½ = 1.14(8) h (hours) respectively 4.104 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁷⁴Hf	100 %	4.104(28) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁴W.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 174) with Tantalum-174. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 101	Isobar A = 174
57	¹⁵⁸La
58	¹⁵⁹Ce
59	¹⁶⁰Pr
60	¹⁶¹Nd
61	¹⁶²Pm
62	¹⁶³Sm
63	¹⁶⁴Eu
64	¹⁶⁵Gd
65	¹⁶⁶Tb	¹⁷⁴Tb
66	¹⁶⁷Dy	¹⁷⁴Dy
67	¹⁶⁸Ho	¹⁷⁴Ho
68	¹⁶⁹Er	¹⁷⁴Er
69	¹⁷⁰Tm	¹⁷⁴Tm
70	¹⁷¹Yb	¹⁷⁴Yb
71	¹⁷²Lu	¹⁷⁴Lu
72	¹⁷³Hf	¹⁷⁴Hf
73	¹⁷⁴Ta	¹⁷⁴Ta
74	¹⁷⁵W	¹⁷⁴W
75	¹⁷⁶Re	¹⁷⁴Re
76	¹⁷⁷Os	¹⁷⁴Os
77	¹⁷⁸Ir	¹⁷⁴Ir
78	¹⁷⁹Pt	¹⁷⁴Pt
79	¹⁸⁰Au	¹⁷⁴Au
80	¹⁸¹Hg	¹⁷⁴Hg
81	¹⁸²Tl
82	¹⁸³Pb
83	¹⁸⁴Bi