Ytterbium-161
Properties and data of the isotope 161Yb.
See also: List of individual Ytterbium isotopes (and general data sources).
General data
Name of the isotope:Ytterbium-161; Yb-161Symbol:161Yb or 16170YbMass number A:161 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:91Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3 (= neutron-proton ratio)Neutron excess (N-Z):21Isotopic mass:160.937907(16) u (atomic weight of Ytterbium-161)Nuclide mass:160.8995099 u (calculated nuclear mass without electrons)Mass excess:-57.83926 MeVMass defect:1.398352596 u (per nucleus)Nuclear binding energy:1302.55705306 MeV (per nucleus)
8.09041648 MeV (average binding energy per nucleon)Separation energy:SN = 7.748(17) MeV (first neutron)
SP = 4.83(4) MeV (first proton)Half-life:4.2(2) minDecay constant λ:0.0027505840498411 s-1Specific activity α:1.035275287202 × 10+19 Bq g-1
279804131.67632 Ci g-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μN) = - 0.327(8)Quadrupole moment Q:+ 1.03(2) barn (100 fm2)Nuclear g-factor:gl = -0.218Charge radius:5.1889(72) femtometer fmYear of discovery:1974
Radioactive Decay
Half-life T½ = 4.2(2) min (minutes) respectively 2.52 × 102 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 161Tm | 100 % | 4.06(3) MeV | |
Parent Nuclides
Direct parent isotope is: 161Lu.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 91) and isobaric (same nucleon number A = 161) with Ytterbium-161. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 91 | Isobar A = 161 |
|---|
| 52 | 143Te | |
| 53 | 144I | |
| 54 | 145Xe | |
| 55 | 146Cs | |
| 56 | 147Ba | |
| 57 | 148La | |
| 58 | 149Ce | |
| 59 | 150Pr | |
| 60 | 151Nd | 161Nd |
| 61 | 152Pm | 161Pm |
| 62 | 153Sm | 161Sm |
| 63 | 154Eu | 161Eu |
| 64 | 155Gd | 161Gd |
| 65 | 156Tb | 161Tb |
| 66 | 157Dy | 161Dy |
| 67 | 158Ho | 161Ho |
| 68 | 159Er | 161Er |
| 69 | 160Tm | 161Tm |
| 70 | 161Yb | 161Yb |
| 71 | 162Lu | 161Lu |
| 72 | 163Hf | 161Hf |
| 73 | 164Ta | 161Ta |
| 74 | 165W | 161W |
| 75 | 166Re | 161Re |
| 76 | 167Os | 161Os |
| 77 | 168Ir | |
| 78 | 169Pt | |
| 79 | 170Au | |
| 80 | 171Hg | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/ytterbium-161
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