Samarium-160

Properties and data of the isotope ¹⁶⁰Sm.

Content

General data

Name of the isotope:Samarium-160; Sm-160Symbol:¹⁶⁰Sm or 16062SmMass number A:160 (= number of nucleons)Atomic number Z:62 (= number of protons)Neutrons N:98Isotopic mass:159.935335(6) u (atomic weight of Samarium-160)Nuclide mass:159.9013257 u (calculated nuclear mass without electrons)Mass excess:-60.23506 MeVMass defect:1.398978752 u (per nucleus)Nuclear binding energy:1303.14031362 MeV (per nucleus)
8.14462696 MeV (average binding energy per nucleon)Separation energy:S_N = 6.098(8) MeV (first neutron)
S_P = 10.969(12) MeV (first proton)Half-life:9.6(3) sDecay constant λ:0.072202831308328 s^-1Specific activity α:2.734689437893 × 10⁺²⁰ Bq g^-1
7391052534.8462 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1986

Radioactive Decay

Half-life T_½ = 9.6(3) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶⁰Eu	100 %	3.246(11) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁰Pm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 98) and isobaric (same nucleon number A = 160) with Samarium-160. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 98	Isobar A = 160
57	¹⁵⁵La
58	¹⁵⁶Ce
59	¹⁵⁷Pr	¹⁶⁰Pr
60	¹⁵⁸Nd	¹⁶⁰Nd
61	¹⁵⁹Pm	¹⁶⁰Pm
62	¹⁶⁰Sm	¹⁶⁰Sm
63	¹⁶¹Eu	¹⁶⁰Eu
64	¹⁶²Gd	¹⁶⁰Gd
65	¹⁶³Tb	¹⁶⁰Tb
66	¹⁶⁴Dy	¹⁶⁰Dy
67	¹⁶⁵Ho	¹⁶⁰Ho
68	¹⁶⁶Er	¹⁶⁰Er
69	¹⁶⁷Tm	¹⁶⁰Tm
70	¹⁶⁸Yb	¹⁶⁰Yb
71	¹⁶⁹Lu	¹⁶⁰Lu
72	¹⁷⁰Hf	¹⁶⁰Hf
73	¹⁷¹Ta	¹⁶⁰Ta
74	¹⁷²W	¹⁶⁰W
75	¹⁷³Re	¹⁶⁰Re
76	¹⁷⁴Os	¹⁶⁰Os
77	¹⁷⁵Ir
78	¹⁷⁶Pt
79	¹⁷⁷Au
80	¹⁷⁸Hg
81	¹⁷⁹Tl
82	¹⁸⁰Pb