Scandium-57

Properties and data of the isotope ⁵⁷Sc.

Content

General data

Name of the isotope:Scandium-57; Sc-57Symbol:⁵⁷Sc or 5721ScMass number A:57 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:36Isotopic mass:56.97779(75) u (atomic weight of Scandium-57)Nuclide mass:56.96627 u (calculated nuclear mass without electrons)Mass excess:-20.68848 MeVMass defect:0.498472648 u (per nucleus)Nuclear binding energy:464.32428078 MeV (per nucleus)
8.14604001 MeV (average binding energy per nucleon)Separation energy:S_N = 4.21(143) MeV (first neutron)
S_P = 14.39(136) MeV (first proton)Half-life:13(4) msDecay constant λ:53.319013889227 s^-1Specific activity α:5.733832359890 × 10⁺²³ Bq g^-1
15496844215919 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-~Year of discovery:1997

Radioactive Decay

Half-life T_½ = 13(4) ms respectively 1.3 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁵⁷Ti	100 %	12.92(133) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁷Ca.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 36) and isobaric (same nucleon number A = 57) with Scandium-57. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 36	Isobar A = 57
19	⁵⁵K
20	⁵⁶Ca	⁵⁷Ca
21	⁵⁷Sc	⁵⁷Sc
22	⁵⁸Ti	⁵⁷Ti
23	⁵⁹V	⁵⁷V
24	⁶⁰Cr	⁵⁷Cr
25	⁶¹Mn	⁵⁷Mn
26	⁶²Fe	⁵⁷Fe
27	⁶³Co	⁵⁷Co
28	⁶⁴Ni	⁵⁷Ni
29	⁶⁵Cu	⁵⁷Cu
30	⁶⁶Zn	⁵⁷Zn
31	⁶⁷Ga
32	⁶⁸Ge
33	⁶⁹As
34	⁷⁰Se
35	⁷¹Br
36	⁷²Kr
37	⁷³Rb
38	⁷⁴Sr