About   |   More   |   Search
ChemLin Logo

Europium-144

Properties and data of the isotope 144Eu.


Contents

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-1
Spin 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
DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+144Sm100 %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 IsomerExcitation EnergyHalf-lifeSpin
144mEu1127.6(6) keV1.0(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.

 

ZIsotone N = 81Isobar A = 144
45126Rh
46127Pd
47128Ag
48129Cd
49130In
50131Sn
51132Sb
52133Te
53134I144I
54135Xe144Xe
55136Cs144Cs
56137Ba144Ba
57138La144La
58139Ce144Ce
59140Pr144Pr
60141Nd144Nd
61142Pm144Pm
62143Sm144Sm
63144Eu144Eu
64145Gd144Gd
65146Tb144Tb
66147Dy144Dy
67148Ho144Ho
68149Er144Er
69150Tm144Tm
70151Yb
71152Lu
72153Hf

 

External data and identifiers

Adopted Levels, Gammas:NuDat 144Eu

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2020-10-20


© 1996 - 2025 ChemLin