Praseodymium-142
Properties and data of the isotope 142Pr.
See also: List of individual Praseodymium isotopes (and general data sources).
General data
Name of the isotope:Praseodymium-142; Pr-142Symbol:142Pr or 14259PrMass number A:142 (= number of nucleons)Atomic number Z:59 (= number of protons)Neutrons N:83Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4067796610169 (= neutron-proton ratio)Neutron excess (N-Z):24Isotopic mass:141.9100504(18) u (atomic weight of Praseodymium-142)Nuclide mass:141.8776866 u (calculated nuclear mass without electrons)Mass excess:-83.78751 MeVMass defect:1.270814516 u (per nucleus)Nuclear binding energy:1183.75609677 MeV (per nucleus)
8.33631054 MeV (average binding energy per nucleon)Separation energy:SN = 5.84315(8) MeV (first neutron)
SP = 5.6435(12) MeV (first proton)Half-life:19.12(4) hDecay constant λ:1.007012988958 × 10-5 s-1Specific activity α:4.300974515811 × 10+16 Bq g-1
1162425.5448139 Ci g-1Spin and parity:
(nuclear angular momentum)2-Magnetic dipole moment:μ(μN) = + 0.234(1)Quadrupole moment Q:0.030(9) barn (100 fm2)Nuclear g-factor:gl = 0.117Year of discovery:1935
Radioactive Decay
Half-life T½ = 19.12(4) h (hours) respectively 6.8832 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 142Nd | 99.9836(8) % | 2.1625(14) MeV | |
| EC | 142Ce | 0.0164(8) % | 0.746(3) 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 |
|---|
| 142mPr | 3.694(3) keV | 14.6(5) min | 5- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 142) with Praseodymium-142. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 83 | Isobar A = 142 |
|---|
| 46 | 129Pd | |
| 47 | 130Ag | |
| 48 | 131Cd | |
| 49 | 132In | |
| 50 | 133Sn | |
| 51 | 134Sb | |
| 52 | 135Te | 142Te |
| 53 | 136I | 142I |
| 54 | 137Xe | 142Xe |
| 55 | 138Cs | 142Cs |
| 56 | 139Ba | 142Ba |
| 57 | 140La | 142La |
| 58 | 141Ce | 142Ce |
| 59 | 142Pr | 142Pr |
| 60 | 143Nd | 142Nd |
| 61 | 144Pm | 142Pm |
| 62 | 145Sm | 142Sm |
| 63 | 146Eu | 142Eu |
| 64 | 147Gd | 142Gd |
| 65 | 148Tb | 142Tb |
| 66 | 149Dy | 142Dy |
| 67 | 150Ho | 142Ho |
| 68 | 151Er | |
| 69 | 152Tm | |
| 70 | 153Yb | |
| 71 | 154Lu | |
| 72 | 155Hf | |
| 73 | 156Ta | |
| 74 | 157W | |
External data and identifiers
Last update: 2020-10-19
Perma link: https://www.chemlin.org/isotope/praseodymium-142
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