Promethium-144
Properties and data of the isotope 144Pm.
See also: list of Promethium isotopes.
General data
Name of the isotope:Promethium-144; Pm-144Symbol:144Pm or 14461PmMass number A:144 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:83Isotopic mass:143.912596(3) u (atomic weight of Promethium-144)Nuclide mass:143.8791352 u (calculated nuclear mass without electrons)Mass excess:-81.4163 MeVMass defect:1.28391898 u (per nucleus)Nuclear binding energy:1195.96282636 MeV (per nucleus)
8.30529741 MeV (average binding energy per nucleon)Separation energy:SN = 6.5268(15) MeV (first neutron)
SP = 4.7028(26) MeV (first proton)Half-life:363(14) dDecay constant λ:2.210290754336 × 10-8 s-1Specific activity α:93081694154060 Bq g-1
2515.7214636232 Ci g-1Spin and parity:
(nuclear angular momentum)5-Magnetic dipole moment:μ(μN) = 1.7Nuclear g-factor:gl = 0.34Year of discovery:1952
Radioactive Decay
Half-life T½ = 363(14) d respectively 3.136 × 107 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC/β+ | 144Nd | 100 % | 2.332(3) MeV | |
Parent Nuclides
Direct parent isotope is: 148Eu.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 144) with Promethium-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 83 | Isobar A = 144 |
46 | 129Pd | |
47 | 130Ag | |
48 | 131Cd | |
49 | 132In | |
50 | 133Sn | |
51 | 134Sb | |
52 | 135Te | |
53 | 136I | 144I |
54 | 137Xe | 144Xe |
55 | 138Cs | 144Cs |
56 | 139Ba | 144Ba |
57 | 140La | 144La |
58 | 141Ce | 144Ce |
59 | 142Pr | 144Pr |
60 | 143Nd | 144Nd |
61 | 144Pm | 144Pm |
62 | 145Sm | 144Sm |
63 | 146Eu | 144Eu |
64 | 147Gd | 144Gd |
65 | 148Tb | 144Tb |
66 | 149Dy | 144Dy |
67 | 150Ho | 144Ho |
68 | 151Er | 144Er |
69 | 152Tm | 144Tm |
70 | 153Yb | |
71 | 154Lu | |
72 | 155Hf | |
73 | 156Ta | |
74 | 157W | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/promethium-144
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