Terbium-164

Properties and data of the isotope ¹⁶⁴Tb.

Contents

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

General data

Name of the isotope:Terbium-164; Tb-164Symbol:¹⁶⁴Tb or 16465TbMass number A:164 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:99Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.5230769230769 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:163.93336(11) u (atomic weight of Terbium-164)Nuclide mass:163.8977053 u (calculated nuclear mass without electrons)Mass excess:-62.07476 MeVMass defect:1.433093764 u (per nucleus)Nuclear binding energy:1334.9182426 MeV (per nucleus)
8.13974538 MeV (average binding energy per nucleon)Separation energy:S_N = 5.55(10) MeV (first neutron)
S_P = 8.05(10) MeV (first proton)Half-life:3.0(1) minDecay constant λ:0.0038508176697775 s^-1Specific activity α:1.42270959713 × 10⁺¹⁹ Bq g^-1
384516107.33432 Ci g^-1Spin and parity:
(nuclear angular momentum)(5+)Year of discovery:1968

Radioactive Decay

Half-life T_½ = 3.0(1) min (minutes) respectively 1.80 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶⁴Dy	100 %	3.89(10) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 99) and isobaric (same nucleon number A = 164) with Terbium-164. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 99	Isobar A = 164
57	¹⁵⁶La
58	¹⁵⁷Ce
59	¹⁵⁸Pr
60	¹⁵⁹Nd
61	¹⁶⁰Pm
62	¹⁶¹Sm	¹⁶⁴Sm
63	¹⁶²Eu	¹⁶⁴Eu
64	¹⁶³Gd	¹⁶⁴Gd
65	¹⁶⁴Tb	¹⁶⁴Tb
66	¹⁶⁵Dy	¹⁶⁴Dy
67	¹⁶⁶Ho	¹⁶⁴Ho
68	¹⁶⁷Er	¹⁶⁴Er
69	¹⁶⁸Tm	¹⁶⁴Tm
70	¹⁶⁹Yb	¹⁶⁴Yb
71	¹⁷⁰Lu	¹⁶⁴Lu
72	¹⁷¹Hf	¹⁶⁴Hf
73	¹⁷²Ta	¹⁶⁴Ta
74	¹⁷³W	¹⁶⁴W
75	¹⁷⁴Re	¹⁶⁴Re
76	¹⁷⁵Os	¹⁶⁴Os
77	¹⁷⁶Ir	¹⁶⁴Ir
78	¹⁷⁷Pt
79	¹⁷⁸Au
80	¹⁷⁹Hg
81	¹⁸⁰Tl
82	¹⁸¹Pb