Samarium-150

Properties and data of the isotope ¹⁵⁰Sm.

Content

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:88Isotopic 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:S_N = 7.9867(4) MeV (first neutron)
S_P = 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 m_a	Quantity	Half-life	Spin
Samarium Isotopic mixture	150.36 u	100 %
Isotope ¹⁴⁴Sm	143.91201(2) u	3.08(4) %	stable	0+
Isotope ¹⁴⁶Sm	145.913047(3) u	[trace]	6.8(7) × 10⁷ a	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-

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.

OZ	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