Ytterbium-171

Properties and data of the isotope ¹⁷¹Yb.

Content

General data

Name of the isotope:Ytterbium-171; Yb-171Symbol:¹⁷¹Yb or 17170YbMass number A:171 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:101Isotopic mass:170.93633(2) u (atomic weight of Ytterbium-171)Nuclide mass:170.8979329 u (calculated nuclear mass without electrons)Mass excess:-59.30822 MeVMass defect:1.486578756 u (per nucleus)Nuclear binding energy:1384.73919174 MeV (per nucleus)
8.09789001 MeV (average binding energy per nucleon)Separation energy:S_N = 6.61421(1) MeV (first neutron)
S_P = 6.7999(8) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = + 0.49367(1)Charge radius:5.2906(57) femtometer fmYear of discovery:1934

Parent Nuclides

Direct parent isotopes are: ¹⁷¹Lu, ¹⁷¹Tm.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Ytterbium Isotopic mixture	173.045 u	100 %
Isotope ¹⁶⁸Yb	167.93389(2) u	0.126(1) %	stable	0+
Isotope ¹⁷⁰Yb	169.93477(2) u	3.023(2) %	stable	0+
Isotope ¹⁷¹Yb	170.93633(2) u	14.216(7) %	stable	1/2-
Isotope ¹⁷²Yb	171.93639(2) u	21.754(10) %	stable	0+
Isotope ¹⁷³Yb	172.93822(2) u	16.098(9) %	stable	5/2-
Isotope ¹⁷⁴Yb	173.93887(2) u	31.896(26) %	stable	0+
Isotope ¹⁷⁶Yb	175.94258(2) u	12.887(30) %	stable	0+

NMR data

Nuclear magnetic properties of the NMR active Nuclide ¹⁷¹Yb

Isotope:¹⁷¹Yb-NMRQuantity:14.216(7) %Spin:1/2-Nuclearmagnetic moment
μ/μ_N:+ 0.49367(1)Gyromagnetic ratio γ:4.7348 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 0.98734Resonance frequency:v₀ = 7.5261 at 1 TRelative Sensitivity:0.00552 (H₀ = const.)
0.1768 (v₀ = const.)
[related to ¹H = 1.000]

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^171m1Yb	95.282(2) keV		7/2+
^171m1Yb	122.416(2) keV	265(20) ns	5/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 171) with Ytterbium-171. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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