Europium-145m

Properties and data of the isotope ^145mEu.

Contents

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

General data

Name of the isotope:Europium-145m; Eu-145mSymbol:^145mEu or 145m63EuMass number A:145 (= number of nucleons)Atomic number Z:63 (= number of protons)Neutrons N:82Isotopic mass:144.916273(3) u (atomic weight of Europium-145m)
Excitation energy: 716.0(3) keVNuclide mass:144.8817152 u (calculated nuclear mass without electrons)Mass excess:-77.9912 MeVMass defect:1.287227128 u (per nucleus)Nuclear binding energy:1199.04434637 MeV (per nucleus)
8.26927135 MeV (average binding energy per nucleon)Half-life:490(30) nsDecay constant λ:1414586.0827754 s^-1Specific activity α:5.915858784013 × 10⁺²⁷ Bq g^-1
1.598880752436 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)11/2-Magnetic dipole moment:μ(μ_N) = + 7.46(5)Nuclear g-factor:g_l = 1.3563636363636

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
¹⁴⁵Eu		5.93(4) d	5/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 82) and isobaric (same nucleon number A = 145) with Europium-145m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 82	Isobar A = 145
45	¹²⁷Rh
46	¹²⁸Pd
47	¹²⁹Ag
48	¹³⁰Cd
49	¹³¹In
50	¹³²Sn
51	¹³³Sb
52	¹³⁴Te
53	¹³⁵I	¹⁴⁵I
54	¹³⁶Xe	¹⁴⁵Xe
55	¹³⁷Cs	¹⁴⁵Cs
56	¹³⁸Ba	¹⁴⁵Ba
57	¹³⁹La	¹⁴⁵La
58	¹⁴⁰Ce	¹⁴⁵Ce
59	¹⁴¹Pr	¹⁴⁵Pr
60	¹⁴²Nd	¹⁴⁵Nd
61	¹⁴³Pm	¹⁴⁵Pm
62	¹⁴⁴Sm	¹⁴⁵Sm
63	¹⁴⁵Eu	¹⁴⁵Eu
64	¹⁴⁶Gd	¹⁴⁵Gd
65	¹⁴⁷Tb	¹⁴⁵Tb
66	¹⁴⁸Dy	¹⁴⁵Dy
67	¹⁴⁹Ho	¹⁴⁵Ho
68	¹⁵⁰Er	¹⁴⁵Er
69	¹⁵¹Tm	¹⁴⁵Tm
70	¹⁵²Yb
71	¹⁵³Lu
72	¹⁵⁴Hf
73	¹⁵⁵Ta
74	¹⁵⁶W