Terbium-167

Properties and data of the isotope ¹⁶⁷Tb.

Content

General data

Name of the isotope:Terbium-167; Tb-167Symbol:¹⁶⁷Tb or 16765TbMass number A:167 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:102Isotopic mass:166.93996(21) u (atomic weight of Terbium-167)Nuclide mass:166.9043053 u (calculated nuclear mass without electrons)Mass excess:-55.9269 MeVMass defect:1.452488512 u (per nucleus)Nuclear binding energy:1352.984334 MeV (per nucleus)
8.1017026 MeV (average binding energy per nucleon)Separation energy:S_N = 6.11(21) MeV (first neutron)
S_P = 8.69(28) MeV (first proton)Half-life:19.4(27) sDecay constant λ:0.035729236111337 s^-1Specific activity α:1.296183690845 × 10⁺²⁰ Bq g^-1
3503199164.4484 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2+)Year of discovery:1999

Radioactive Decay

Half-life T_½ = 19.4(27) s respectively 1.94 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶⁷Dy	100 %	4.0(2) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 167) with Terbium-167. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 102	Isobar A = 167
60	¹⁶²Nd
61	¹⁶³Pm
62	¹⁶⁴Sm
63	¹⁶⁵Eu	¹⁶⁷Eu
64	¹⁶⁶Gd	¹⁶⁷Gd
65	¹⁶⁷Tb	¹⁶⁷Tb
66	¹⁶⁸Dy	¹⁶⁷Dy
67	¹⁶⁹Ho	¹⁶⁷Ho
68	¹⁷⁰Er	¹⁶⁷Er
69	¹⁷¹Tm	¹⁶⁷Tm
70	¹⁷²Yb	¹⁶⁷Yb
71	¹⁷³Lu	¹⁶⁷Lu
72	¹⁷⁴Hf	¹⁶⁷Hf
73	¹⁷⁵Ta	¹⁶⁷Ta
74	¹⁷⁶W	¹⁶⁷W
75	¹⁷⁷Re	¹⁶⁷Re
76	¹⁷⁸Os	¹⁶⁷Os
77	¹⁷⁹Ir	¹⁶⁷Ir
78	¹⁸⁰Pt	¹⁶⁷Pt
79	¹⁸¹Au
80	¹⁸²Hg
81	¹⁸³Tl
82	¹⁸⁴Pb
83	¹⁸⁵Bi
84	¹⁸⁶Po