Samarium-150
Properties and data of the isotope 150Sm.
See also: List of individual Samarium isotopes (and general data sources).
General data
Name of the isotope:Samarium-150; Sm-150Symbol:150Sm or 15062SmMass number A:150 (= number of nucleons)Atomic number Z:62 (= number of protons)Neutrons N:88Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4193548387097 (= neutron-proton ratio)Neutron excess (N-Z):26Isotopic mass:149.91728(2) u (atomic weight of Samarium-150)Nuclide mass:149.8832707 u (calculated nuclear mass without electrons)Mass excess:-77.05318 MeVMass defect:1.330384592 u (per nucleus)Nuclear binding energy:1239.24526514 MeV (per nucleus)
8.2616351 MeV (average binding energy per nucleon)Separation energy:SN = 7.9867(4) MeV (first neutron)
SP = 8.2758(19) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.0387(47) femtometer fmYear of discovery:1934
Parent Nuclides
Direct parent isotopes are: 150Eu, 150Pm, 150Nd.
Occurrence
Comparison of the natural Samarium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| | Atomic Mass ma | Quantity | Half-life | Spin |
|---|
Samarium
Isotopic mixture | 150.36 u | 100 % | | |
| Isotope 144Sm | 143.91201(2) u | 3.08(4) % | stable | 0+ |
| Isotope 148Sm | 147.91483(2) u | 11.25(9) % | 7(3)×1015 a | 0+ |
| Isotope 149Sm | 148.91719(2) u | 13.82(10) % | stable | 7/2- |
| Isotope 150Sm | 149.91728(2) u | 7.37(9) % | stable | 0+ |
| Isotope 152Sm | 151.91974(2) u | 26.74(9) % | stable | 0+ |
| Isotope 154Sm | 153.92222(2) u | 22.74(14) % | stable | 0+ |
| Isotope 147Sm | 146.91490(2) u | 15.00(14) % | 1.0625(38) × 1011 a | 7/2- |
| Isotope 146Sm | 145.913047(3) u |
[trace] | 9.20 (26) × 107 a | 0+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 88) and isobaric (same nucleon number A = 150) with Samarium-150. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 88 | Isobar A = 150 |
|---|
| 49 | 137In | |
| 50 | 138Sn | |
| 51 | 139Sb | |
| 52 | 140Te | |
| 53 | 141I | |
| 54 | 142Xe | |
| 55 | 143Cs | 150Cs |
| 56 | 144Ba | 150Ba |
| 57 | 145La | 150La |
| 58 | 146Ce | 150Ce |
| 59 | 147Pr | 150Pr |
| 60 | 148Nd | 150Nd |
| 61 | 149Pm | 150Pm |
| 62 | 150Sm | 150Sm |
| 63 | 151Eu | 150Eu |
| 64 | 152Gd | 150Gd |
| 65 | 153Tb | 150Tb |
| 66 | 154Dy | 150Dy |
| 67 | 155Ho | 150Ho |
| 68 | 156Er | 150Er |
| 69 | 157Tm | 150Tm |
| 70 | 158Yb | 150Yb |
| 71 | 159Lu | 150Lu |
| 72 | 160Hf | |
| 73 | 161Ta | |
| 74 | 162W | |
| 75 | 163Re | |
| 76 | 164Os | |
| 77 | 165Ir | |
| 78 | 166Pt | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/samarium-150
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