Europium-152m1
Properties and data of the isotope 152m1Eu.
See also: List of individual Europium isotopes (and general data sources).
General data
Name of the isotope:Europium-152m1; Eu-152m1Symbol:152m1Eu or 152m163EuMass 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:45.5998(4) keVIsotopic mass:151.9217510(13) u (atomic weight of Europium-152m1)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:9.3116(13) hDecay constant λ:2.067752947816 × 10-5 s-1Specific activity α:8.246555970397 × 10+16 Bq g-1
2228798.9109182 Ci g-1Spin and parity:
(nuclear angular momentum)0-
Radioactive Decay
Half-life T½ = 9.3116(13) h (hours) respectively 3.352176 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 152Sm | 27(3) % | | |
| β- | 152Gd | 73(3) % | | |
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- |
| 152m2Eu | 65.2969(4) keV | 0.94(8) μs | 1- |
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-152m1. 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 | |
External data and identifiers
Last update: 2023-10-16
Perma link: https://www.chemlin.org/isotope/europium-152m1
© 1996 - 2026 ChemLin
