See also: List of individual Samarium isotopes (and general data sources).
General data
Name of the isotope:Samarium-141; Sm-141Symbol:141Sm or 14162SmMass number A:141 (= number of nucleons)Atomic number Z:62 (= number of protons)Neutrons N:79Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.2741935483871 (= neutron-proton ratio)Neutron excess (N-Z):17Isotopic mass:140.918482(9) u (atomic weight of Samarium-141)Nuclide mass:140.8844727 u (calculated nuclear mass without electrons)Mass excess:-75.93353 MeVMass defect:1.251198348 u (per nucleus)Nuclear binding energy:1165.48375397 MeV (per nucleus) 8.26584223 MeV (average binding energy per nucleon)Separation energy:SN = 8.549(15) MeV (first neutron) SP = 5.009(26) MeV (first proton)Half-life:10.2(2) minDecay constant λ:0.0011325934322875 s-1Specific activity α:4.840129538925 × 10+18 Bq g-1 130814311.86284 Ci g-1Spin and parity: (nuclear angular momentum)1/2+Magnetic dipole moment:μ(μN) = -0.74(2)Nuclear g-factor:gl = -1.48Charge radius:4.9517(34) femtometer fmYear of discovery:1967
Radioactive Decay
Half-life T½ = 10.2(2) min (minutes) respectively 6.12 × 102 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 79) and isobaric (same nucleon number A = 141) with Samarium-141. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
