Samarium-165
Properties and data of the isotope 165Sm.
See also: list of Samarium isotopes.
General data
Name of the isotope:Samarium-165; Sm-165Symbol:165Sm or 16562SmMass number A:165 (= number of nucleons)Atomic number Z:62 (= number of protons)Neutrons N:103Isotopic mass:164.95297(43) u (atomic weight of Samarium-165)Nuclide mass:164.9189607 u (calculated nuclear mass without electrons)Mass excess:-43.80816 MeVMass defect:1.424668332 u (per nucleus)Nuclear binding energy:1327.07000325 MeV (per nucleus)
8.0428485 MeV (average binding energy per nucleon)Half-life:0.98(21) sDecay constant λ:0.7072930413877 s-1Specific activity α:2.597206295420 × 10+21 Bq g-1
70194764741.097 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:2012
Radioactive Decay
Half-life T½ = 0.98(21) s respectively 9.8 × 10-1 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 165Eu | 100 % | 6.92(42) MeV | |
| β-, n | 164Eu | ? | 1.50(42) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 103) and isobaric (same nucleon number A = 165) with Samarium-165. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 103 | Isobar A = 165 |
|---|
| 60 | 163Nd | |
| 62 | 165Sm | 165Sm |
| 63 | 166Eu | 165Eu |
| 64 | 167Gd | 165Gd |
| 65 | 168Tb | 165Tb |
| 66 | 169Dy | 165Dy |
| 67 | 170Ho | 165Ho |
| 68 | 171Er | 165Er |
| 69 | 172Tm | 165Tm |
| 70 | 173Yb | 165Yb |
| 71 | 174Lu | 165Lu |
| 72 | 175Hf | 165Hf |
| 73 | 176Ta | 165Ta |
| 74 | 177W | 165W |
| 75 | 178Re | 165Re |
| 76 | 179Os | 165Os |
| 77 | 180Ir | 165Ir |
| 78 | 181Pt | |
| 79 | 182Au | |
| 80 | 183Hg | |
| 81 | 184Tl | |
| 82 | 185Pb | |
| 83 | 186Bi | |
| 84 | 187Po | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/samarium-165
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