Scandium-50m

Properties and data of the isotope ^50mSc.

Contents

See also: List of individual Scandium isotopes (and general data sources).

General data

Name of the isotope:Scandium-50m; Sc-50mSymbol:^50mSc or 50m21ScMass 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-50m)
Excitation energy: 256.895(10) keVNuclide 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)Half-life:0.35(4) sDecay constant λ:1.9804205158856 s^-1Specific activity α:2.433953328279 × 10⁺²² Bq g^-1
657825223859.43 Ci g^-1Spin and parity:
(nuclear angular momentum)2+

Radioactive Decay

Half-life T_½ = 0.35(4) s respectively 3.5 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁵⁰Sc	99.5(5) %
β^-	⁵⁰Ti	< 1.0 %	6.89 MeV

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
⁵⁰Sc		102.5(5) s	5+

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-50m. 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