Europium-152m2

Properties and data of the isotope ^152m2Eu.

Contents

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

General data

Name of the isotope:Europium-152m2; Eu-152m2Symbol:^152m2Eu or 152m263EuMass number A:152 (= number of nucleons)Atomic number Z:63 (= number of protons)Neutrons N:89Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4126984126984 (= neutron-proton ratio)Neutron excess (N-Z):26Excitation energy:65.2969(4) keVIsotopic mass:151.9217510(13) u (atomic weight of Europium-152m2)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)Half-life:0.94(8) μsDecay constant λ:737390.61761696 s^-1Specific activity α:2.940841170917 × 10⁺²⁷ Bq g^-1
7.948219380857 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)1-

Radioactive Decay

Half-life T_½ = 0.94(8) μs respectively 9.4 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁵²Eu	100 %	0.1478 MeV

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
¹⁵²Eu		13.517(9) a	3-
^152m1Eu	45.5998(4) keV	9.3116(13) h	0-

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-152m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 89	Isobar A = 152
50	¹³⁹Sn
51	¹⁴⁰Sb
52	¹⁴¹Te
53	¹⁴²I
54	¹⁴³Xe
55	¹⁴⁴Cs
56	¹⁴⁵Ba	¹⁵²Ba
57	¹⁴⁶La	¹⁵²La
58	¹⁴⁷Ce	¹⁵²Ce
59	¹⁴⁸Pr	¹⁵²Pr
60	¹⁴⁹Nd	¹⁵²Nd
61	¹⁵⁰Pm	¹⁵²Pm
62	¹⁵¹Sm	¹⁵²Sm
63	¹⁵²Eu	¹⁵²Eu
64	¹⁵³Gd	¹⁵²Gd
65	¹⁵⁴Tb	¹⁵²Tb
66	¹⁵⁵Dy	¹⁵²Dy
67	¹⁵⁶Ho	¹⁵²Ho
68	¹⁵⁷Er	¹⁵²Er
69	¹⁵⁸Tm	¹⁵²Tm
70	¹⁵⁹Yb	¹⁵²Yb
71	¹⁶⁰Lu	¹⁵²Lu
72	¹⁶¹Hf
73	¹⁶²Ta
74	¹⁶³W
75	¹⁶⁴Re
76	¹⁶⁵Os
77	¹⁶⁶Ir
78	¹⁶⁷Pt