Europium-144
Properties and data of the isotope 144Eu.
See also: list of Europium isotopes.
General data
Name of the isotope:Europium-144; Eu-144Symbol:144Eu or 14463EuMass number A:144 (= number of nucleons)Atomic number Z:63 (= number of protons)Neutrons N:81Isotopic mass:143.918820(12) u (atomic weight of Europium-144)Nuclide mass:143.8842622 u (calculated nuclear mass without electrons)Mass excess:-75.61868 MeVMass defect:1.276015212 u (per nucleus)Nuclear binding energy:1188.60051389 MeV (per nucleus)
8.25417024 MeV (average binding energy per nucleon)Separation energy:SN = 9.449(15) MeV (first neutron)
SP = 3.391(11) MeV (first proton)Half-life:10.2(1) sDecay constant λ:0.06795560593725 s-1Specific activity α:2.861805812422 × 10+20 Bq g-1
7734610303.8457 Ci g-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μN) = + 1.893(13) MeVQuadrupole moment Q:0.10(3) barn (100 fm2)Nuclear g-factor:gl = 1.893Charge radius:4.9612(91) femtometer fmYear of discovery:1965
Radioactive Decay
Half-life T½ = 10.2(1) s respectively 1.02 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC/β+ | 144Sm | 100 % | 6.346(11) MeV | |
Parent Nuclides
Direct parent isotope is: 144Gd.
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 |
---|
144mEu | 1127.6(6) keV | 1.0(1) μs | (8-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 144) with Europium-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 81 | Isobar A = 144 |
45 | 126Rh | |
46 | 127Pd | |
47 | 128Ag | |
48 | 129Cd | |
49 | 130In | |
50 | 131Sn | |
51 | 132Sb | |
52 | 133Te | |
53 | 134I | 144I |
54 | 135Xe | 144Xe |
55 | 136Cs | 144Cs |
56 | 137Ba | 144Ba |
57 | 138La | 144La |
58 | 139Ce | 144Ce |
59 | 140Pr | 144Pr |
60 | 141Nd | 144Nd |
61 | 142Pm | 144Pm |
62 | 143Sm | 144Sm |
63 | 144Eu | 144Eu |
64 | 145Gd | 144Gd |
65 | 146Tb | 144Tb |
66 | 147Dy | 144Dy |
67 | 148Ho | 144Ho |
68 | 149Er | 144Er |
69 | 150Tm | 144Tm |
70 | 151Yb | |
71 | 152Lu | |
72 | 153Hf | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/europium-144
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