Yttrium-100
Properties and data of the isotope 100Y.
See also: list of Yttrium isotopes.
General data
Name of the isotope:Yttrium-100; Y-100Symbol:100Y or 10039YMass number A:100 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:61Isotopic mass:99.927721(12) u (atomic weight of Yttrium-100)Nuclide mass:99.9063273 u (calculated nuclear mass without electrons)Mass excess:-67.32745 MeVMass defect:0.90601512399999 u (per nucleus)Nuclear binding energy:843.94765192 MeV (per nucleus)
8.43947652 MeV (average binding energy per nucleon)Separation energy:SN = 4.749(13) MeV (first neutron)
SP = 12.095(12) MeV (first proton)Half-life:735(7) msDecay constant λ:0.94305738851693 s-1Specific activity α:5.736590336013 × 10+21 Bq g-1
155042982054.41 Ci g-1Spin and parity:
(nuclear angular momentum)1-. 2-Magnetic dipole moment:μ(μN) = +2.75(1)Quadrupole moment Q:+1.71(19) barn (100 fm2)Charge radius:4.4705(228) femtometer fmYear of discovery:1977
Radioactive Decay
Half-life T½ = 735(7) ms respectively 7.35 × 10-1 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 100Zr | 99.08 % | 9.050(14) MeV | |
β-, n | 99Zr | 0.92(8) % | 2.222(15) MeV | |
Parent Nuclides
Direct parent isotope is: 100Sr.
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 |
---|
100mY | 145(15) keV | 0.94(3) s | (3,4,5) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 100) with Yttrium-100. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 61 | Isobar A = 100 |
34 | 95Se | |
35 | 96Br | |
36 | 97Kr | 100Kr |
37 | 98Rb | 100Rb |
38 | 99Sr | 100Sr |
39 | 100Y | 100Y |
40 | 101Zr | 100Zr |
41 | 102Nb | 100Nb |
42 | 103Mo | 100Mo |
43 | 104Tc | 100Tc |
44 | 105Ru | 100Ru |
45 | 106Rh | 100Rh |
46 | 107Pd | 100Pd |
47 | 108Ag | 100Ag |
48 | 109Cd | 100Cd |
49 | 110In | 100In |
50 | 111Sn | 100Sn |
51 | 112Sb | |
52 | 113Te | |
53 | 114I | |
54 | 115Xe | |
55 | 116Cs | |
56 | 117Ba | |
57 | 118La | |
58 | 119Ce | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/yttrium-100
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