Scandium-50

Properties and data of the isotope ⁵⁰Sc.

Contents

General data

Name of the isotope:Scandium-50; Sc-50Symbol:⁵⁰Sc or 5021ScMass number A:50 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:29Isotopic mass:49.952176(16) u (atomic weight of Scandium-50)Nuclide mass:49.940656 u (calculated nuclear mass without electrons)Mass excess:-44.54777 MeVMass defect:0.463432236 u (per nucleus)Nuclear binding energy:431.68434724 MeV (per nucleus)
8.63368694 MeV (average binding energy per nucleon)Separation energy:S_N = 6.057(15) MeV (first neutron)
S_P = 10.537(15) MeV (first proton)Half-life:102.5(5) sDecay constant λ:0.006762411517658 s^-1Specific activity α:8.311060145345 × 10⁺¹⁹ Bq g^-1
2246232471.7151 Ci g^-1Spin and parity:
(nuclear angular momentum)5+Year of discovery:1959

Radioactive Decay

Half-life T_½ = 102.5(5) s respectively 1.025 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁵⁰Ti	100 %	6.884(15) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁰Ca.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^50mSc	256.895(10) keV	0.35(4) s	2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 29) and isobaric (same nucleon number A = 50) with Scandium-50. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 29	Isobar A = 50
13	⁴²Al
14	⁴³Si
15	⁴⁴P
16	⁴⁵S
17	⁴⁶Cl	⁵⁰Cl
18	⁴⁷Ar	⁵⁰Ar
19	⁴⁸K	⁵⁰K
20	⁴⁹Ca	⁵⁰Ca
21	⁵⁰Sc	⁵⁰Sc
22	⁵¹Ti	⁵⁰Ti
23	⁵²V	⁵⁰V
24	⁵³Cr	⁵⁰Cr
25	⁵⁴Mn	⁵⁰Mn
26	⁵⁵Fe	⁵⁰Fe
27	⁵⁶Co	⁵⁰Co
28	⁵⁷Ni	⁵⁰Ni
29	⁵⁸Cu
30	⁵⁹Zn
31	⁶⁰Ga
32	⁶¹Ge
33	⁶²As
34	⁶³Se