Yttrium-86
Properties and data of the isotope 86Y.
See also: List of individual Yttrium isotopes (and general data sources).
General data
Name of the isotope:Yttrium-86; Y-86Symbol:86Y or 8639YMass number A:86 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:47Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.2051282051282 (= neutron-proton ratio)Neutron excess (N-Z):8Isotopic mass:85.914886(15) u (atomic weight of Yttrium-86)Nuclide mass:85.8934923 u (calculated nuclear mass without electrons)Mass excess:-79.28318 MeVMass defect:0.79754130000001 u (per nucleus)Nuclear binding energy:742.9049357 MeV (per nucleus)
8.63842948 MeV (average binding energy per nucleon)Separation energy:SN = 9.512(24) MeV (first neutron)
SP = 5.469(14) MeV (first proton)Half-life:14.74(2) hDecay constant λ:1.30624751349 × 10-5 s-1Specific activity α:9.254595910820 × 10+16 Bq g-1
2501242.1380595 Ci g-1Spin and parity:
(nuclear angular momentum)4-Magnetic dipole moment:μ(μN) = 0.6Nuclear g-factor:gl = 0.15Charge radius:4.2513(23) femtometer fmYear of discovery:1951
Radioactive Decay
Half-life T½ = 14.74(2) h (hours) respectively 5.3064 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 86Sr | 100 % | 5.240(14) MeV | |
Parent Nuclides
Direct parent isotope is: 86Zr.
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 |
|---|
| 86m1Y | 218.21(9) keV | 47.4(4) min | (8+) |
| 86m2Y | 302.18(9) keV | 127(4) ns | (7-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 47) and isobaric (same nucleon number A = 86) with Yttrium-86. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 47 | Isobar A = 86 |
|---|
| 26 | 73Fe | |
| 27 | 74Co | |
| 28 | 75Ni | |
| 29 | 76Cu | |
| 30 | 77Zn | |
| 31 | 78Ga | 86Ga |
| 32 | 79Ge | 86Ge |
| 33 | 80As | 86As |
| 34 | 81Se | 86Se |
| 35 | 82Br | 86Br |
| 36 | 83Kr | 86Kr |
| 37 | 84Rb | 86Rb |
| 38 | 85Sr | 86Sr |
| 39 | 86Y | 86Y |
| 40 | 87Zr | 86Zr |
| 41 | 88Nb | 86Nb |
| 42 | 89Mo | 86Mo |
| 43 | 90Tc | 86Tc |
| 44 | 91Ru | 86Ru |
| 45 | 92Rh | |
| 46 | 93Pd | |
| 47 | 94Ag | |
| 48 | 95Cd | |
| 49 | 96In | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/yttrium-86
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