Ytterbium-178

Properties and data of the isotope ¹⁷⁸Yb.

Content

General data

Name of the isotope:Ytterbium-178; Yb-178Symbol:¹⁷⁸Yb or 17870YbMass number A:178 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:108Isotopic mass:177.946650(11) u (atomic weight of Ytterbium-178)Nuclide mass:177.9082529 u (calculated nuclear mass without electrons)Mass excess:-49.6952 MeVMass defect:1.536913168 u (per nucleus)Nuclear binding energy:1431.62539451 MeV (per nucleus)
8.0428393 MeV (average binding energy per nucleon)Separation energy:S_N = 6.78(1) MeV (first neutron)
S_P = 9.52(30) MeV (first proton)Half-life:74(3) minDecay constant λ:0.00015611422985584 s^-1Specific activity α:5.311536058940 × 10⁺¹⁷ Bq g^-1
14355502.862001 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1973

Radioactive Decay

Half-life T_½ = 74(3) min (minutes) respectively 4.440 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁷⁸Lu	100 %	0.642(10) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 108) and isobaric (same nucleon number A = 178) with Ytterbium-178. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 108	Isobar A = 178
66	¹⁷⁴Dy
67	¹⁷⁵Ho
68	¹⁷⁶Er
69	¹⁷⁷Tm	¹⁷⁸Tm
70	¹⁷⁸Yb	¹⁷⁸Yb
71	¹⁷⁹Lu	¹⁷⁸Lu
72	¹⁸⁰Hf	¹⁷⁸Hf
73	¹⁸¹Ta	¹⁷⁸Ta
74	¹⁸²W	¹⁷⁸W
75	¹⁸³Re	¹⁷⁸Re
76	¹⁸⁴Os	¹⁷⁸Os
77	¹⁸⁵Ir	¹⁷⁸Ir
78	¹⁸⁶Pt	¹⁷⁸Pt
79	¹⁸⁷Au	¹⁷⁸Au
80	¹⁸⁸Hg	¹⁷⁸Hg
81	¹⁸⁹Tl	¹⁷⁸Tl
82	¹⁹⁰Pb	¹⁷⁸Pb
83	¹⁹¹Bi
84	¹⁹²Po
85	¹⁹³At
86	¹⁹⁴Rn