About   |   More   |   Search
ChemLin Logo

Europium-152

Properties and data of the isotope 152Eu.


Contents

 

Europium-152 isotope

Eu-152 is a radioisotope of the chemical element Europium. The atomic nucleus of the nuclide is composed of 89 neutrons and 63 protons; this results in a mass number of 152.

See also: list of Europium isotopes.

 

General data

Name of the isotope:Europium-152; Eu-152Symbol:152Eu or 15263EuMass number A:152 (= number of nucleons)Atomic number Z:63 (= number of protons)Neutrons N:89Isotopic mass:151.9217510(13) u (atomic weight of Europium-152)Nuclide mass:151.8871932 u (calculated nuclear mass without electrons)Mass excess:-72.88847 MeVMass defect:1.34240354 u (per nucleus)Nuclear binding energy:1250.44084309 MeV (per nucleus)
8.22658449 MeV (average binding energy per nucleon)
Separation energy:SN = 6.30672(10) MeV (first neutron)
SP = 5.6010(5) MeV (first proton)
Half-life:13.517(9) aDecay constant λ:1.626067389930 × 10-9 s-1Specific activity α:6485037662192.3 Bq g-1
175.27128816736 Ci g-1
Spin and parity:
(nuclear angular momentum)
3-Magnetic dipole moment:μ(μN) = - 1.9401(8)Quadrupole moment Q:+ 2.71(3) barn (100 fm2)Nuclear g-factor:gl = -0.6467Charge radius:5.1064(66) femtometer fmYear of discovery:1938

 

Radioactive Decay

Half-life T½ = 13.517(9) a respectively 4.26272112 × 108 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+152Sm72.08(13) %1.8743(18) MeV
β-152Gd27.92(13) %1.8187(7) MeV

 

The diagram below shows a calculated spectrum with the most intense gamma emissions of the isotope europium-152:

 

Eu-152 decay scheme

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
152m1Eu45.5998(4) keV9.3116(13) h0-
152m2Eu65.2969(4) keV0.94(8) μs1-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 89) and isobaric (same nucleon number A = 152) with Europium-152. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 89Isobar A = 152
50139Sn
51140Sb
52141Te
53142I
54143Xe
55144Cs
56145Ba152Ba
57146La152La
58147Ce152Ce
59148Pr152Pr
60149Nd152Nd
61150Pm152Pm
62151Sm152Sm
63152Eu152Eu
64153Gd152Gd
65154Tb152Tb
66155Dy152Dy
67156Ho152Ho
68157Er152Er
69158Tm152Tm
70159Yb152Yb
71160Lu152Lu
72161Hf
73162Ta
74163W
75164Re
76165Os
77166Ir
78167Pt

 

External data and identifiers

CAS:14683-23-9InChI Key:OGPBJKLSAFTDLK-IGMARMGPSA-NSMILES:[152Eu]PubChem:ID 104907Adopted Levels, Gammas:NuDat 152Eu

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2023-10-16


© 1996 - 2025 ChemLin