Palladium-115
Properties and data of the isotope 115Pd.
See also: List of individual Palladium isotopes (and general data sources).
General data
Name of the isotope:Palladium-115; Pd-115Symbol:115Pd or 11546PdMass number A:115 (= number of nucleons)Atomic number Z:46 (= number of protons)Neutrons N:69Isotopic mass:149.13659(15) u (atomic weight of Palladium-115)Nuclide mass:149.1113566 u (calculated nuclear mass without electrons)Mass excess:31798.02877 MeVMass defect:-33.178759324 u (per nucleus)Nuclear binding energy:-30905.81523775 MeV (per nucleus)
-268.74621946 MeV (average binding energy per nucleon)Separation energy:SN = 5.007(15) MeV (first neutron)
SP = 12.00(7) MeV (first proton)Half-life:25(2) sDecay constant λ:0.027725887222398 s-1Specific activity α:1.12059864644 × 10+20 Bq g-1
3028644990.3865 Ci g-1Spin and parity:
(nuclear angular momentum)(1/2)+Year of discovery:1958
Radioactive Decay
Half-life T½ = 25(2) s respectively 2.5 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 115Ag | 100 % | 4.556(22) MeV | |
Parent Nuclides
Direct parent isotopes are: 115Rh, 252Cf.
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 |
|---|
| 115mPd | 89.21(16) keV | 50(3) s | (7/2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 69) and isobaric (same nucleon number A = 115) with Palladium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 69 | Isobar A = 115 |
|---|
| 38 | 107Sr | |
| 39 | 108Y | |
| 40 | 109Zr | |
| 41 | 110Nb | 115Nb |
| 42 | 111Mo | 115Mo |
| 43 | 112Tc | 115Tc |
| 44 | 113Ru | 115Ru |
| 45 | 114Rh | 115Rh |
| 46 | 115Pd | 115Pd |
| 47 | 116Ag | 115Ag |
| 48 | 117Cd | 115Cd |
| 49 | 118In | 115In |
| 50 | 119Sn | 115Sn |
| 51 | 120Sb | 115Sb |
| 52 | 121Te | 115Te |
| 53 | 122I | 115I |
| 54 | 123Xe | 115Xe |
| 55 | 124Cs | 115Cs |
| 56 | 125Ba | 115Ba |
| 57 | 126La | |
| 58 | 127Ce | |
| 59 | 128Pr | |
| 60 | 129Nd | |
| 61 | 130Pm | |
| 62 | 131Sm | |
| 63 | 132Eu | |
External data and identifiers
Last update: 2020-10-16
Perma link: https://www.chemlin.org/isotope/palladium-115
© 1996 - 2025 ChemLin
