Promethium-141
Properties and data of the isotope 141Pm.
See also: List of individual Promethium isotopes (and general data sources).
General data
Name of the isotope:Promethium-141; Pm-141Symbol:141Pm or 14161PmMass number A:141 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:80Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3114754098361 (= neutron-proton ratio)Neutron excess (N-Z):19Isotopic mass:140.913555(15) u (atomic weight of Promethium-141)Nuclide mass:140.8800942 u (calculated nuclear mass without electrons)Mass excess:-80.523 MeVMass defect:1.256965232 u (per nucleus)Nuclear binding energy:1170.85557182 MeV (per nucleus)
8.30394023 MeV (average binding energy per nucleon)Separation energy:SN = 10.381(28) MeV (first neutron)
SP = 3.553(14) MeV (first proton)Half-life:20.90(5) minDecay constant λ:0.00055274894781495 s-1Specific activity α:2.377665731373 × 10+18 Bq g-1
64261235.983078 Ci g-1Spin and parity:
(nuclear angular momentum)5/2+Year of discovery:1952
Radioactive Decay
Half-life T½ = 20.90(5) min (minutes) respectively 1.254 × 103 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 141Nd | 100 % | 3.670(14) MeV | |
Parent Nuclides
Direct parent isotope is: 141Sm.
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 |
|---|
| 141m1Pm | 628.62(7) keV | 0.63(2) μs | 11/2- |
| 141m2Pm | 2530.75(17) keV | 2 µs | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 141) with Promethium-141. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 80 | Isobar A = 141 |
|---|
| 44 | 124Ru | |
| 45 | 125Rh | |
| 46 | 126Pd | |
| 47 | 127Ag | |
| 48 | 128Cd | |
| 49 | 129In | |
| 50 | 130Sn | |
| 51 | 131Sb | 141Sb |
| 52 | 132Te | 141Te |
| 53 | 133I | 141I |
| 54 | 134Xe | 141Xe |
| 55 | 135Cs | 141Cs |
| 56 | 136Ba | 141Ba |
| 57 | 137La | 141La |
| 58 | 138Ce | 141Ce |
| 59 | 139Pr | 141Pr |
| 60 | 140Nd | 141Nd |
| 61 | 141Pm | 141Pm |
| 62 | 142Sm | 141Sm |
| 63 | 143Eu | 141Eu |
| 64 | 144Gd | 141Gd |
| 65 | 145Tb | 141Tb |
| 66 | 146Dy | 141Dy |
| 67 | 147Ho | 141Ho |
| 68 | 148Er | |
| 69 | 149Tm | |
| 70 | 150Yb | |
| 71 | 151Lu | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/promethium-141
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