Ytterbium-170

Properties and data of the isotope ¹⁷⁰Yb.

Contents

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

General data

Name of the isotope:Ytterbium-170; Yb-170Symbol:¹⁷⁰Yb or 17070YbMass number A:170 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:100Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4285714285714 (= neutron-proton ratio)Neutron excess (N-Z):30Isotopic mass:169.93477(2) u (atomic weight of Ytterbium-170)Nuclide mass:169.8963729 u (calculated nuclear mass without electrons)Mass excess:-60.76135 MeVMass defect:1.47947384 u (per nucleus)Nuclear binding energy:1378.12100512 MeV (per nucleus)
8.10659415 MeV (average binding energy per nucleon)Separation energy:S_N = 8.4577(12) MeV (first neutron)
S_P = 6.7777(8) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.2853(56) femtometer fmYear of discovery:1938

Parent Nuclides

Direct parent isotopes are: ¹⁷⁰Lu, ¹⁷⁰Tm, ¹⁷⁴Hf.

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+

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
^170mYb	1258.46(14) keV	370(15) ns	4-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 100) and isobaric (same nucleon number A = 170) with Ytterbium-170. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 100	Isobar A = 170
57	¹⁵⁷La
58	¹⁵⁸Ce
59	¹⁵⁹Pr
60	¹⁶⁰Nd
61	¹⁶¹Pm
62	¹⁶²Sm
63	¹⁶³Eu
64	¹⁶⁴Gd	¹⁷⁰Gd
65	¹⁶⁵Tb	¹⁷⁰Tb
66	¹⁶⁶Dy	¹⁷⁰Dy
67	¹⁶⁷Ho	¹⁷⁰Ho
68	¹⁶⁸Er	¹⁷⁰Er
69	¹⁶⁹Tm	¹⁷⁰Tm
70	¹⁷⁰Yb	¹⁷⁰Yb
71	¹⁷¹Lu	¹⁷⁰Lu
72	¹⁷²Hf	¹⁷⁰Hf
73	¹⁷³Ta	¹⁷⁰Ta
74	¹⁷⁴W	¹⁷⁰W
75	¹⁷⁵Re	¹⁷⁰Re
76	¹⁷⁶Os	¹⁷⁰Os
77	¹⁷⁷Ir	¹⁷⁰Ir
78	¹⁷⁸Pt	¹⁷⁰Pt
79	¹⁷⁹Au	¹⁷⁰Au
80	¹⁸⁰Hg	¹⁷⁰Hg
81	¹⁸¹Tl
82	¹⁸²Pb