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Thulium-169

Properties and data of the isotope 169Tm.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Thulium isotopes.

 

General data

Name of the isotope:Thulium-169; Tm-169Symbol:169Tm or 16969TmMass number A:169 (= number of nucleons)Atomic number Z:69 (= number of protons)Neutrons N:100Isotopic mass:168.93422(2) u (atomic weight of Thulium-169)Nuclide mass:168.8963714 u (calculated nuclear mass without electrons)Mass excess:-61.27368 MeVMass defect:1.472198808 u (per nucleus)Nuclear binding energy:1371.34435646 MeV (per nucleus)
8.11446365 MeV (average binding energy per nucleon)Separation energy:SN = 8.0336(15) MeV (first neutron)
SP = 5.5730(11) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μN) = - 0.2316(15)Charge radius:5.2256(35) femtometer fmYear of discovery:1934

 

Parent Nuclides

Direct parent isotopes are: 169Yb, 169Er.

 

Occurrence

Comparison of the natural Thulium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Thulium
Isotopic mixture		168.934218 u100 %
Isotope 169Tm168.93422(2) u100 %stable1/2+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 169Tm

Isotope:169Tm-NMRQuantity:100 %Spin:1/2+Nuclearmagnetic moment
μ/μN:- 0.2316(15)Gyromagnetic ratio γ:- 2.1376 · 107 rad T-1 s-1Nuclear g-factor:gl = -0.4632Quadrupole moment Q:- 1.20 barn (100 fm2)Resonance frequency:v0 = 3.531 at 1 TRelative Sensitivity:0.00057 (H0 = const.)
0.0829 (v0 = const.)
[related to 1H = 1.000]

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 100) and isobaric (same nucleon number A = 169) with Thulium-169. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 100Isobar A = 169
59159Pr
60160Nd
61161Pm
62162Sm
63163Eu
64164Gd169Gd
65165Tb169Tb
66166Dy169Dy
67167Ho169Ho
68168Er169Er
69169Tm169Tm
70170Yb169Yb
71171Lu169Lu
72172Hf169Hf
73173Ta169Ta
74174W169W
75175Re169Re
76176Os169Os
77177Ir169Ir
78178Pt169Pt
79179Au
80180Hg
81181Tl
82182Pb

 

External data and identifiers

Adopted Levels, Gammas:NuDat 169Tm

 

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Last update: 2020-10-11

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