Scandium-49

Properties and data of the isotope ⁴⁹Sc.

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-49; Sc-49Symbol:⁴⁹Sc or 4921ScMass number A:49 (= number of nucleons)Atomic number Z:21 (= number of protons)Neutrons N:28Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3333333333333 (= neutron-proton ratio)Neutron excess (N-Z):7Isotopic mass:48.950024(4) u (atomic weight of Scandium-49)Nuclide mass:48.938504 u (calculated nuclear mass without electrons)Mass excess:-46.55234 MeVMass defect:0.45691932 u (per nucleus)Nuclear binding energy:425.61760506 MeV (per nucleus)
8.68607357 MeV (average binding energy per nucleon)Separation energy:S_N = 10.129(6) MeV (first neutron)
S_P = 9.6256(27) MeV (first proton)Half-life:57.2(2) minDecay constant λ:0.0002020366038708 s^-1Specific activity α:2.534776848694 × 10⁺¹⁸ Bq g^-1
68507482.397141 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = (+)5.61(3)Mirror nucleus:Nickel-49Year of discovery:1940

Radioactive Decay

Half-life T_½ = 57.2(2) min (minutes) respectively 3.4308 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁴⁹Ti	100 %	2.0025(27) MeV

Parent Nuclides

Direct parent isotope is: ⁴⁹Ca.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 49) with Scandium-49. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 28	Isobar A = 49
11	³⁹Na
12	⁴⁰Mg
13	⁴¹Al
14	⁴²Si
15	⁴³P
16	⁴⁴S	⁴⁹S
17	⁴⁵Cl	⁴⁹Cl
18	⁴⁶Ar	⁴⁹Ar
19	⁴⁷K	⁴⁹K
20	⁴⁸Ca	⁴⁹Ca
21	⁴⁹Sc	⁴⁹Sc
22	⁵⁰Ti	⁴⁹Ti
23	⁵¹V	⁴⁹V
24	⁵²Cr	⁴⁹Cr
25	⁵³Mn	⁴⁹Mn
26	⁵⁴Fe	⁴⁹Fe
27	⁵⁵Co	⁴⁹Co
28	⁵⁶Ni	⁴⁹Ni
29	⁵⁷Cu
30	⁵⁸Zn
31	⁵⁹Ga
32	⁶⁰Ge