Scandium-43

Properties and data of the isotope ⁴³Sc.

Contents

General data

Name of the isotope:Scandium-43; Sc-43Symbol:⁴³Sc or 4321ScMass number A:43 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:22Isotopic mass:42.9611505(20) u (atomic weight of Scandium-43)Nuclide mass:42.9496305 u (calculated nuclear mass without electrons)Mass excess:-36.18808 MeVMass defect:0.393803324 u (per nucleus)Nuclear binding energy:366.82543349 MeV (per nucleus)
8.53082403 MeV (average binding energy per nucleon)Separation energy:S_N = 12.1383(19) MeV (first neutron)
S_P = 4.9298(19) MeV (first proton)Half-life:3.891(12) hDecay constant λ:4.948365034409 × 10^-5 s^-1Specific activity α:7.095178872285 × 10⁺¹⁷ Bq g^-1
19176159.114286 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = + 4.526(10)Quadrupole moment Q:- 0.027(5) barn (100 fm²)Nuclear g-factor:g_l = 1.2931428571429Charge radius:3.5575(147) femtometer fmMirror nucleus:Titanium-43Year of discovery:1935

Radioactive Decay

Half-life T_½ = 3.891(12) h (hours) respectively 1.40076 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁴³Ca	100 %	2.2207(19) MeV

Parent Nuclides

Direct parent isotope is: ⁴³Ti.

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
^43m1Sc	151.79(8) keV	438(7) μs	3/2+
^43m2Sc	3123.73(15) keV	472(4) ns	(19/2)-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 43) with Scandium-43. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 22	Isobar A = 43
9	³¹F
10	³²Ne
11	³³Na
12	³⁴Mg
13	³⁵Al	⁴³Al
14	³⁶Si	⁴³Si
15	³⁷P	⁴³P
16	³⁸S	⁴³S
17	³⁹Cl	⁴³Cl
18	⁴⁰Ar	⁴³Ar
19	⁴¹K	⁴³K
20	⁴²Ca	⁴³Ca
21	⁴³Sc	⁴³Sc
22	⁴⁴Ti	⁴³Ti
23	⁴⁵V	⁴³V
24	⁴⁶Cr	⁴³Cr
25	⁴⁷Mn	⁴³Mn
26	⁴⁸Fe
27	⁴⁹Co
28	⁵⁰Ni