Ytterbium-154

Properties and data of the isotope ¹⁵⁴Yb.

Content

General data

Name of the isotope:Ytterbium-154; Yb-154Symbol:¹⁵⁴Yb or 15470YbMass number A:154 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:84Isotopic mass:153.946396(19) u (atomic weight of Ytterbium-154)Nuclide mass:153.9079989 u (calculated nuclear mass without electrons)Mass excess:-49.9318 MeVMass defect:1.329209184 u (per nucleus)Nuclear binding energy:1238.15037964 MeV (per nucleus)
8.03993753 MeV (average binding energy per nucleon)Separation energy:S_N = 10.79(20) MeV (first neutron)
S_P = 3.248(21) MeV (first proton)Half-life:0.409(2) sDecay constant λ:1.6947363827872 s^-1Specific activity α:6.670549815427 × 10⁺²¹ Bq g^-1
180285130146.69 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.0875(105) femtometer fmYear of discovery:1964

Radioactive Decay

Half-life T_½ = 0.409(2) s respectively 4.09 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁵⁴Tm	7.4(12) %	4.495(23) MeV
α	¹⁵⁰Er	92.6(12) %	5.4743(17) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁵⁴Lu, ¹⁵⁸Hf.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 84) and isobaric (same nucleon number A = 154) with Ytterbium-154. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 84	Isobar A = 154
47	¹³¹Ag
48	¹³²Cd
49	¹³³In
50	¹³⁴Sn
51	¹³⁵Sb
52	¹³⁶Te
53	¹³⁷I
54	¹³⁸Xe
55	¹³⁹Cs
56	¹⁴⁰Ba
57	¹⁴¹La	¹⁵⁴La
58	¹⁴²Ce	¹⁵⁴Ce
59	¹⁴³Pr	¹⁵⁴Pr
60	¹⁴⁴Nd	¹⁵⁴Nd
61	¹⁴⁵Pm	¹⁵⁴Pm
62	¹⁴⁶Sm	¹⁵⁴Sm
63	¹⁴⁷Eu	¹⁵⁴Eu
64	¹⁴⁸Gd	¹⁵⁴Gd
65	¹⁴⁹Tb	¹⁵⁴Tb
66	¹⁵⁰Dy	¹⁵⁴Dy
67	¹⁵¹Ho	¹⁵⁴Ho
68	¹⁵²Er	¹⁵⁴Er
69	¹⁵³Tm	¹⁵⁴Tm
70	¹⁵⁴Yb	¹⁵⁴Yb
71	¹⁵⁵Lu	¹⁵⁴Lu
72	¹⁵⁶Hf	¹⁵⁴Hf
73	¹⁵⁷Ta
74	¹⁵⁸W
75	¹⁵⁹Re