Thulium-169

Properties and data of the isotope ¹⁶⁹Tm.

Contents

General Data

Parent Nuclides

NMR Data

Isotones und Isobares

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

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:100Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4492753623188 (= neutron-proton ratio)Neutron excess (N-Z):31Isotopic 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:S_N = 8.0336(15) MeV (first neutron)
S_P = 5.5730(11) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μ_N) = - 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 m_a	Quantity	Half-life	Spin
Thulium Isotopic mixture	168.934218 u	100 %
Isotope ¹⁶⁹Tm	168.93422(2) u	100 %	stable	1/2+

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ¹⁶⁹Tm

Isotope:¹⁶⁹Tm-NMRQuantity:100 %Spin:1/2+Nuclearmagnetic moment
μ/μ_N:- 0.2316(15)Gyromagnetic ratio γ:0 · 10⁷ rad T^-1 s^-1
0.00000 MHz T^-1Nuclear g-factor:g_l = -0.4632Quadrupole moment Q:- 1.20 barn (100 fm²)Resonance frequency:v₀ = 3.531 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.00057 (H₀ = const.)
0.0829 (v₀ = const.)

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.

Z	Isotone N = 100	Isobar A = 169
58	¹⁵⁸Ce
59	¹⁵⁹Pr
60	¹⁶⁰Nd
61	¹⁶¹Pm
62	¹⁶²Sm
63	¹⁶³Eu
64	¹⁶⁴Gd	¹⁶⁹Gd
65	¹⁶⁵Tb	¹⁶⁹Tb
66	¹⁶⁶Dy	¹⁶⁹Dy
67	¹⁶⁷Ho	¹⁶⁹Ho
68	¹⁶⁸Er	¹⁶⁹Er
69	¹⁶⁹Tm	¹⁶⁹Tm
70	¹⁷⁰Yb	¹⁶⁹Yb
71	¹⁷¹Lu	¹⁶⁹Lu
72	¹⁷²Hf	¹⁶⁹Hf
73	¹⁷³Ta	¹⁶⁹Ta
74	¹⁷⁴W	¹⁶⁹W
75	¹⁷⁵Re	¹⁶⁹Re
76	¹⁷⁶Os	¹⁶⁹Os
77	¹⁷⁷Ir	¹⁶⁹Ir
78	¹⁷⁸Pt	¹⁶⁹Pt
79	¹⁷⁹Au
80	¹⁸⁰Hg
81	¹⁸¹Tl
82	¹⁸²Pb