Promethium-143

Properties and data of the isotope ¹⁴³Pm.

Content

General Data

Radioactive Decay

Parent Nuclides

NMR Data

Isotones und Isobares

General data

Name of the isotope:Promethium-143; Pm-143Symbol:¹⁴³Pm or 14361PmMass number A:143 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:82Isotopic mass:142.910938(3) u (atomic weight of Promethium-143)Nuclide mass:142.8774772 u (calculated nuclear mass without electrons)Mass excess:-82.96072 MeVMass defect:1.276912064 u (per nucleus)Nuclear binding energy:1189.43592614 MeV (per nucleus)
8.31773375 MeV (average binding energy per nucleon)Separation energy:S_N = 9.890(24) MeV (first neutron)
S_P = 4.2996(27) MeV (first proton)Half-life:265(7) dDecay constant λ:3.026843583231 × 10^-8 s^-1Specific activity α:1.283667494310 × 10⁺¹⁴ Bq g^-1
3469.3716062454 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = + 3.80Year of discovery:1952

Radioactive Decay

Half-life T_½ = 265(7) d respectively 2.29 × 10⁷ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁴³Nd	100 %	3.443(4) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁴³Sm, ¹⁴⁷Eu.

NMR data

Nuclear magnetic properties of the NMR active Nuclide ¹⁴³Pm

Isotope:¹⁴³Pm-NMRQuantity:Does not occur in nature!Spin:5/2+Nuclearmagnetic moment
μ/μ_N:+ 3.80Nuclear g-factor:g_l = 1.52Quadrupole moment Q:- 0.33 barn (100 fm²)Resonance frequency:v₀ = 11.59 at 1 TRelative Sensitivity:0.23510 (H₀ = const.)
3.1748 (v₀ = const.)
[related to ¹H = 1.000]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 82) and isobaric (same nucleon number A = 143) with Promethium-143. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 82	Isobar A = 143
45	¹²⁷Rh
46	¹²⁸Pd
47	¹²⁹Ag
48	¹³⁰Cd
49	¹³¹In
50	¹³²Sn
51	¹³³Sb
52	¹³⁴Te	¹⁴³Te
53	¹³⁵I	¹⁴³I
54	¹³⁶Xe	¹⁴³Xe
55	¹³⁷Cs	¹⁴³Cs
56	¹³⁸Ba	¹⁴³Ba
57	¹³⁹La	¹⁴³La
58	¹⁴⁰Ce	¹⁴³Ce
59	¹⁴¹Pr	¹⁴³Pr
60	¹⁴²Nd	¹⁴³Nd
61	¹⁴³Pm	¹⁴³Pm
62	¹⁴⁴Sm	¹⁴³Sm
63	¹⁴⁵Eu	¹⁴³Eu
64	¹⁴⁶Gd	¹⁴³Gd
65	¹⁴⁷Tb	¹⁴³Tb
66	¹⁴⁸Dy	¹⁴³Dy
67	¹⁴⁹Ho	¹⁴³Ho
68	¹⁵⁰Er	¹⁴³Er
69	¹⁵¹Tm
70	¹⁵²Yb
71	¹⁵³Lu
72	¹⁵⁴Hf
73	¹⁵⁵Ta