Ytterbium-176

Properties and data of the isotope ¹⁷⁶Yb.

Contents

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

General data

Name of the isotope:Ytterbium-176; Yb-176Symbol:¹⁷⁶Yb or 17670YbMass number A:176 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:106Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5142857142857 (= neutron-proton ratio)Neutron excess (N-Z):36Isotopic mass:175.94258(2) u (atomic weight of Ytterbium-176)Nuclide mass:175.9041829 u (calculated nuclear mass without electrons)Mass excess:-53.48639 MeVMass defect:1.523653336 u (per nucleus)Nuclear binding energy:1419.27394056 MeV (per nucleus)
8.06405648 MeV (average binding energy per nucleon)Separation energy:S_N = 6.86708(7) MeV (first neutron)
S_P = 8.47(5) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.3215(62) femtometer fmYear of discovery:1934

Parent Nuclides

Direct parent isotopes are: ¹⁷⁶Lu, ¹⁷⁶Tm.

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
^176mYb	1049.8(6) keV	11.4(3) s	8-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 106) and isobaric (same nucleon number A = 176) with Ytterbium-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 106	Isobar A = 176
64	¹⁷⁰Gd
65	¹⁷¹Tb
66	¹⁷²Dy
67	¹⁷³Ho
68	¹⁷⁴Er	¹⁷⁶Er
69	¹⁷⁵Tm	¹⁷⁶Tm
70	¹⁷⁶Yb	¹⁷⁶Yb
71	¹⁷⁷Lu	¹⁷⁶Lu
72	¹⁷⁸Hf	¹⁷⁶Hf
73	¹⁷⁹Ta	¹⁷⁶Ta
74	¹⁸⁰W	¹⁷⁶W
75	¹⁸¹Re	¹⁷⁶Re
76	¹⁸²Os	¹⁷⁶Os
77	¹⁸³Ir	¹⁷⁶Ir
78	¹⁸⁴Pt	¹⁷⁶Pt
79	¹⁸⁵Au	¹⁷⁶Au
80	¹⁸⁶Hg	¹⁷⁶Hg
81	¹⁸⁷Tl	¹⁷⁶Tl
82	¹⁸⁸Pb
83	¹⁸⁹Bi
84	¹⁹⁰Po
85	¹⁹¹At