Europium-153

Properties and data of the isotope ¹⁵³Eu.

Contents

See also: List of individual Europium isotopes (and general data sources).

General data

Name of the isotope:Europium-153; Eu-153Symbol:¹⁵³Eu or 15363EuMass number A:153 (= number of nucleons)Atomic number Z:63 (= number of protons)Neutrons N:90Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4285714285714 (= neutron-proton ratio)Neutron excess (N-Z):27Isotopic mass:152.92124(2) u (atomic weight of Europium-153)Nuclide mass:152.8866822 u (calculated nuclear mass without electrons)Mass excess:-73.36447 MeVMass defect:1.351579456 u (per nucleus)Nuclear binding energy:1258.98815379 MeV (per nucleus)
8.22868074 MeV (average binding energy per nucleon)Separation energy:S_N = 8.55028(12) MeV (first neutron)
S_P = 5.8936(7) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = + 1.5324(3)Charge radius:5.1115(62) femtometer fmYear of discovery:1933

Occurrence

Comparison of the natural Europium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Europium Isotopic mixture	151.964 u	100 %
Isotope ¹⁵¹Eu	150.9198566(13) u	47.81(6) %	1.7 × 10¹⁸ a	5/2+
Isotope ¹⁵³Eu	152.92124(2) u	52.19(6) %	stable	5/2+

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ¹⁵³Eu

Isotope:¹⁵³Eu-NMRQuantity:52.19(6) %Spin:5/2+Nuclearmagnetic moment
μ/μ_N:+ 1.5324(3)Gyromagnetic ratio γ:2.9371 · 10⁷ rad T^-1 s^-1
4.67454 MHz T^-1Nuclear g-factor:g_l = 0.61296Quadrupole moment Q:2.412(21) barn (100 fm²)Line width parameter (factor):l = 18616.78 fm⁴Resonance frequency:v₀ = 4.6745 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.01544 (H₀ = const.)
1.2809 (v₀ = const.)

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
^153mEu	1771.0(4) keV	475(19) ns	19/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 153) with Europium-153. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 90	Isobar A = 153
50	¹⁴⁰Sn
51	¹⁴¹Sb
52	¹⁴²Te
53	¹⁴³I
54	¹⁴⁴Xe
55	¹⁴⁵Cs
56	¹⁴⁶Ba	¹⁵³Ba
57	¹⁴⁷La	¹⁵³La
58	¹⁴⁸Ce	¹⁵³Ce
59	¹⁴⁹Pr	¹⁵³Pr
60	¹⁵⁰Nd	¹⁵³Nd
61	¹⁵¹Pm	¹⁵³Pm
62	¹⁵²Sm	¹⁵³Sm
63	¹⁵³Eu	¹⁵³Eu
64	¹⁵⁴Gd	¹⁵³Gd
65	¹⁵⁵Tb	¹⁵³Tb
66	¹⁵⁶Dy	¹⁵³Dy
67	¹⁵⁷Ho	¹⁵³Ho
68	¹⁵⁸Er	¹⁵³Er
69	¹⁵⁹Tm	¹⁵³Tm
70	¹⁶⁰Yb	¹⁵³Yb
71	¹⁶¹Lu	¹⁵³Lu
72	¹⁶²Hf	¹⁵³Hf
73	¹⁶³Ta
74	¹⁶⁴W
75	¹⁶⁵Re
76	¹⁶⁶Os
77	¹⁶⁷Ir
78	¹⁶⁸Pt
80	¹⁷⁰Hg