Ytterbium-175

Properties and data of the isotope ¹⁷⁵Yb.

Content

Ytterbium-175 is a radioactive isotope of the chemical element ytterbium, which, in addition to the element-specific 70 protons, has 105 neutrons in the atomic nucleus; this results in the mass number 175. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide ¹⁷⁵Yb can be generated by neutron capture from Ytterbium-174.

¹⁷⁴Yb(n, γ)¹⁷⁵Yb → ¹⁷⁵Lu (stable); σ= 69 Barn.

The decay properties of the Radiolanthanide could be of interest for medical applications.

General data

Name of the isotope:Ytterbium-175; Yb-175Symbol:¹⁷⁵Yb or 17570YbMass number A:175 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:105Isotopic mass:174.94128191(8) u (atomic weight of Ytterbium-175)Nuclide mass:174.9028848 u (calculated nuclear mass without electrons)Mass excess:-54.69555 MeVMass defect:1.51628651 u (per nucleus)Nuclear binding energy:1412.41178635 MeV (per nucleus)
8.07092449 MeV (average binding energy per nucleon)Separation energy:S_N = 5.82235(7) MeV (first neutron)
S_P = 8.120(45) MeV (first proton)Half-life:4.185(1) dDecay constant λ:1.916974148634 × 10^-11 s^-1Specific activity α:66346484758.251 Bq g^-1
1.7931482367095 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2-)Magnetic dipole moment:μ(μ_N) = 0.58(8)Nuclear g-factor:g_l = 0.16571428571429Charge radius:5.3135(61) femtometer fmYear of discovery:1945

Radioactive Decay

The half-life of ytterbium-175 was redetermined in 2021 [1]: It is therefore 4.1615(30) days (= 3.595536 × 10 ⁵ seconds); this corresponds to a relative deviation of 0.56% from the above value (ENSDF 2004).

Half-life T_½ = 4.185(1) d respectively 361584 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁷⁵Lu	100 %	0.4701(12) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁵Tm.

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
^175mYb	514.866(4) keV	68.2(3) ms	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 105) and isobaric (same nucleon number A = 175) with Ytterbium-175. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 105	Isobar A = 175
63	¹⁶⁸Eu
64	¹⁶⁹Gd
65	¹⁷⁰Tb
66	¹⁷¹Dy
67	¹⁷²Ho	¹⁷⁵Ho
68	¹⁷³Er	¹⁷⁵Er
69	¹⁷⁴Tm	¹⁷⁵Tm
70	¹⁷⁵Yb	¹⁷⁵Yb
71	¹⁷⁶Lu	¹⁷⁵Lu
72	¹⁷⁷Hf	¹⁷⁵Hf
73	¹⁷⁸Ta	¹⁷⁵Ta
74	¹⁷⁹W	¹⁷⁵W
75	¹⁸⁰Re	¹⁷⁵Re
76	¹⁸¹Os	¹⁷⁵Os
77	¹⁸²Ir	¹⁷⁵Ir
78	¹⁸³Pt	¹⁷⁵Pt
79	¹⁸⁴Au	¹⁷⁵Au
80	¹⁸⁵Hg	¹⁷⁵Hg
81	¹⁸⁶Tl
82	¹⁸⁷Pb
83	¹⁸⁸Bi
84	¹⁸⁹Po
85	¹⁹⁰At

External data and identifiers

Adopted Levels, Gammas:NuDat 175Yb

Literature and References

[1] - M. Teresa Durán, Frédéric Juget, Youcef Nedjadi et al.:
Ytterbium-175 half-life determination.
In: Applied Radiation and Isotopes, (2021), DOI 10.1016/j.apradiso.2021.109893.