Scandium-47

Properties and data of the isotope ⁴⁷Sc.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Scandium-47; Sc-47Symbol:⁴⁷Sc or 4721ScMass number A:47 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:26Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.2380952380952 (= neutron-proton ratio)Neutron excess (N-Z):5Isotopic mass:46.9524075(22) u (atomic weight of Scandium-47)Nuclide mass:46.9408875 u (calculated nuclear mass without electrons)Mass excess:-44.33213 MeVMass defect:0.437205988 u (per nucleus)Nuclear binding energy:407.25475459 MeV (per nucleus)
8.66499478 MeV (average binding energy per nucleon)Separation energy:S_N = 10.6467(20) MeV (first neutron)
S_P = 8.4862(12) MeV (first proton)Half-life:3.3492(6) dDecay constant λ:2.395359134132 × 10^-6 s^-1Specific activity α:3.135910894756 × 10⁺¹⁶ Bq g^-1
847543.48506943 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Isobaric spin: 5/2Magnetic dipole moment:μ(μ_N) = + 5.34(2)Quadrupole moment Q:- 0.022(3) barn (100 fm²)Nuclear g-factor:g_l = 1.5257142857143Mirror nucleus:Iron-47Year of discovery:1945

Radioactive Decay

Half-life T_½ = 3.3492(6) d respectively 2.8937088 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁴⁷Ti	100 %	0.6008(19) MeV

Parent Nuclides

Direct parent isotope is: ⁴⁷Ca.

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
^47mSc	766.83(9) keV	272(8) ns	(3/2)+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 26) and isobaric (same nucleon number A = 47) with Scandium-47. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 26	Isobar A = 47
11	³⁷Na
12	³⁸Mg
13	³⁹Al
14	⁴⁰Si
15	⁴¹P	⁴⁷P
16	⁴²S	⁴⁷S
17	⁴³Cl	⁴⁷Cl
18	⁴⁴Ar	⁴⁷Ar
19	⁴⁵K	⁴⁷K
20	⁴⁶Ca	⁴⁷Ca
21	⁴⁷Sc	⁴⁷Sc
22	⁴⁸Ti	⁴⁷Ti
23	⁴⁹V	⁴⁷V
24	⁵⁰Cr	⁴⁷Cr
25	⁵¹Mn	⁴⁷Mn
26	⁵²Fe	⁴⁷Fe
27	⁵³Co	⁴⁷Co
28	⁵⁴Ni
29	⁵⁵Cu
30	⁵⁶Zn