Scandium-45m

Properties and data of the isotope ^45mSc.

Contents

General data

Name of the isotope:Scandium-45m; Sc-45mSymbol:^45mSc or 45m21ScMass number A:45 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:24Isotopic mass:44.9559119(9) u (atomic weight of Scandium-45m)
Excitation energy: 12.40(5) keVNuclide mass:44.9443919 u (calculated nuclear mass without electrons)Mass excess:-41.0678 MeVMass defect:0.41637175600001 u (per nucleus)Nuclear binding energy:387.84779248 MeV (per nucleus)
8.61883983 MeV (average binding energy per nucleon)Half-life:318(7) msDecay constant λ:2.1797081149684 s^-1Specific activity α:2.983297568610 × 10⁺²² Bq g^-1
806296640165.03 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μ_N) = + 0.368(5)Quadrupole moment Q:0.318(22) barn (100 fm²)Nuclear g-factor:g_l = 0.24533333333333

Radioactive Decay

Half-life T_½ = 318(7) ms respectively 3.18 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁴⁵Sc

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
⁴⁵Sc		stable	7/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 24) and isobaric (same nucleon number A = 45) with Scandium-45m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 24	Isobar A = 45
10	³⁴Ne
11	³⁵Na
12	³⁶Mg
13	³⁷Al
14	³⁸Si
15	³⁹P	⁴⁵P
16	⁴⁰S	⁴⁵S
17	⁴¹Cl	⁴⁵Cl
18	⁴²Ar	⁴⁵Ar
19	⁴³K	⁴⁵K
20	⁴⁴Ca	⁴⁵Ca
21	⁴⁵Sc	⁴⁵Sc
22	⁴⁶Ti	⁴⁵Ti
23	⁴⁷V	⁴⁵V
24	⁴⁸Cr	⁴⁵Cr
25	⁴⁹Mn	⁴⁵Mn
26	⁵⁰Fe	⁴⁵Fe
27	⁵¹Co
28	⁵²Ni
29	⁵³Cu
30	⁵⁴Zn