Isotopes of scandium#Scandium-54

Naturally occurring scandium (₂₁Sc) is composed of one stable isotope, ⁴⁵Sc. Twenty-seven radioisotopes have been characterized, with the most stable being ⁴⁶Sc with a half-life of 83.8 days, ⁴⁷Sc with a half-life of 3.35 days, and ⁴⁸Sc with a half-life of 43.7 hours and ⁴⁴Sc with a half-life of 3.97 hours. All the remaining isotopes have half-lives that are less than four hours, and the majority of these have half-lives that are less than two minutes, the least stable being proton unbound ³⁹Sc with a half-life shorter than 300 nanoseconds. This element also has 13 meta states with the most stable being ^44m3Sc (t_1/2 58.6 h).

The isotopes of scandium range from ³⁷Sc to ⁶²Sc. The primary decay mode at masses lower than the only stable isotope, ⁴⁵Sc, is beta-plus or electron capture, and the primary mode at masses above it is beta-minus. The primary decay products at atomic weights below ⁴⁵Sc are calcium isotopes and the primary products from higher atomic weights are titanium isotopes.

List of isotopes

{{Isotopes table

| symbol = Sc

| refs = NUBASE2020, AME2020 II

| notes = m, unc(), mass#, hl#, spin(), spin#, daughter-st, p, n, IT

}}

|-id=Scandium-37

| ³⁷Sc{{cite journal | last=Dronchi | first=N. | last2=Charity | first2=R. J. | last3=Sobotka | first3=L. G. | last4=Brown | first4=B. A. | last5=Weisshaar | first5=D. | last6=Gade | first6=A. | last7=Brown | first7=K. W. | last8=Reviol | first8=W. | last9=Bazin | first9=D. | last10=Farris | first10=P. J. | last11=Hill | first11=A. M. | last12=Li | first12=J. | last13=Longfellow | first13=B. | last14=Rhodes | first14=D. | last15=Paneru | first15=S. N. | last16=Gillespie | first16=S. A. | last17=Anthony | first17=A. K. | last18=Rubino | first18=E. | last19=Biswas | first19=S. | title=Evolution of shell gaps in the neutron-poor calcium region from invariant-mass spectroscopy of ^37,38Sc, ³⁵Ca, and ³⁴K | journal=Physical Review C | volume=110 | issue=3 | date=2024-09-12 | issn=2469-9985 | doi=10.1103/PhysRevC.110.L031302}}

| style="text-align:right" | 21

| style="text-align:right" | 16

| 37.00376(44)

| p

| ³⁶Ca

|-id=Scandium-38

| ³⁸Sc

| style="text-align:right" | 21

| style="text-align:right" | 17

| 37.995002(15)

| p

| ³⁷Ca

|-id=Scandium-39

| ³⁹Sc

| style="text-align:right" | 21

| style="text-align:right" | 18

| 38.984785(26)

| p

| ³⁸Ca

| 7/2−#

|-id=Scandium-40

| rowspan=3|⁴⁰Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 19

| rowspan=3|39.9779673(30)

| rowspan=3|182.3(7) ms

| β⁺ (99.54%)

| ⁴⁰Ca

| rowspan=3|4−

| rowspan=3|

| β⁺, p (0.44%)

| ³⁹K

| β⁺, α (0.017%)

| ³⁶Ar

|-id=Scandium-41

| ⁴¹Sc

| style="text-align:right" | 21

| style="text-align:right" | 20

| 40.969251163(83)

| 596.3(17) ms

| β⁺

| ⁴¹Ca

| 7/2−

|-id=Scandium-42

| ⁴²Sc

| style="text-align:right" | 21

| 41.96551669(17)

| 680.72(26) ms

| β⁺

| ⁴²Ca

| 0+

|-id=Scandium-42m

| style="text-indent:1em" | ^42mSc

| colspan="3" style="text-indent:2em" | 616.81(6) keV

| 61.7(4) s

| β⁺

| ⁴²Ca

| 7+

|-id=Scandium-43

| ⁴³Sc

| style="text-align:right" | 21

| style="text-align:right" | 22

| 42.9611504(20)

| 3.891(12) h

| β⁺

| ⁴³Ca

| 7/2−

|-id=Scandium-43m1

| style="text-indent:1em" | ^43m1Sc

| colspan="3" style="text-indent:2em" | 151.79(8) keV

| 438(5) μs

| IT

| ⁴³Sc

| 3/2+

|-id=Scandium-43m2

| style="text-indent:1em" | ^43m2Sc

| colspan="3" style="text-indent:2em" | 3123.73(15) keV

| 472(3) ns

| IT

| ⁴³Sc

| 19/2−

|-id=Scandium-44

| ⁴⁴Sc

| style="text-align:right" | 21

| style="text-align:right" | 23

| 43.9594028(19)

| 4.0421(25) h

| β⁺

| ⁴⁴Ca

| 2+

|-id=Scandium-44m1

| style="text-indent:1em" | ^44m1Sc

| colspan="3" style="text-indent:2em" | 67.8679(14) keV

| 154.8(8) ns

| IT

| ⁴⁴Sc

| 1−

|-id=Scandium-44m2

| style="text-indent:1em" | ^44m2Sc

| colspan="3" style="text-indent:2em" | 146.1914(20) keV

| 51.0(3) μs

| IT

| ⁴⁴Sc

| 0−

|-id=Scandium-44m3

| rowspan=2 style="text-indent:1em" | ^44m3Sc

| rowspan=2 colspan="3" style="text-indent:2em" | 271.240(10) keV

| rowspan=2|58.61(10) h

| IT (98.80%)

| ⁴⁴Sc

| rowspan=2| 6+

| rowspan=2|

| β⁺ (1.20%)

| ⁴⁴Ca

|-id=Scandium-45

| ⁴⁵Sc

| style="text-align:right" | 21

| style="text-align:right" | 24

| 44.95590705(71)

| colspan=3 align=center|Stable

| 7/2−

| 1.0000

|-id=Scandium-45m

| style="text-indent:1em" | ^45mSc

| colspan="3" style="text-indent:2em" | 12.40(5) keV

| 318(7) ms

| IT

| ⁴⁵Sc

| 3/2+

|-id=Scandium-46

| ⁴⁶Sc

| style="text-align:right" | 21

| style="text-align:right" | 25

| 45.95516703(72)

| 83.757(14) d

| β⁻

| ⁴⁶Ti

| 4+

|-id=Scandium-46m1

| style="text-indent:1em" | ^46m1Sc

| colspan="3" style="text-indent:2em" | 52.011(1) keV

| 9.4(8) μs

| IT

| ⁴⁶Sc

| 6+

|-id=Scandium-46m2

| style="text-indent:1em" | ^46m2Sc

| colspan="3" style="text-indent:2em" | 142.528(7) keV

| 18.75(4) s

| IT

| ⁴⁶Sc

| 1−

|-id=Scandium-47

| ⁴⁷Sc

| style="text-align:right" | 21

| style="text-align:right" | 26

| 46.9524024(21)

| 3.3492(6) d

| β⁻

| ⁴⁷Ti

| 7/2−

|-id=Scandium-47m

| style="text-indent:1em" | ^47mSc

| colspan="3" style="text-indent:2em" | 766.83(9) keV

| 272(8) ns

| IT

| ⁴⁷Sc

| (3/2)+

|-id=Scandium-48

| ⁴⁸Sc

| style="text-align:right" | 21

| style="text-align:right" | 27

| 47.9522229(53)

| 43.67(9) h

| β⁻

| ⁴⁸Ti

| 6+

|-id=Scandium-49

| ⁴⁹Sc

| style="text-align:right" | 21

| style="text-align:right" | 28

| 48.9500132(24)

| 57.18(13) min

| β⁻

| ⁴⁹Ti

| 7/2−

|-id=Scandium-50

| ⁵⁰Sc

| style="text-align:right" | 21

| style="text-align:right" | 29

| 49.9521874(27)

| 102.5(5) s

| β⁻

| ⁵⁰Ti

| 5+

|-id=Scandium-50m

| rowspan=2 style="text-indent:1em" | ^50mSc

| rowspan=2 colspan="3" style="text-indent:2em" | 256.895(10) keV

| rowspan=2|350(40) ms

| IT (>99%)

| ⁵⁰Sc

| rowspan=2|2+

| rowspan=2|

| β⁻ (<1%)

| ⁵⁰Ti

|-id=Scandium-51

| rowspan=2|⁵¹Sc

| rowspan=2 style="text-align:right" | 21

| rowspan=2 style="text-align:right" | 30

| rowspan=2|50.9535688(27)

| rowspan=2|12.4(1) s

| β⁻

| ⁵¹Ti

| rowspan=2|(7/2)−

| rowspan=2|

| β⁻, n?

| ⁵⁰Ti

|-id=Scandium-52

| rowspan=2|⁵²Sc

| rowspan=2 style="text-align:right" | 21

| rowspan=2 style="text-align:right" | 31

| rowspan=2|51.9564962(33)

| rowspan=2|8.2(2) s

| β⁻

| ⁵²Ti

| rowspan=2|3(+)

| rowspan=2|

| β⁻, n?

| ⁵¹Ti

|-id=Scandium-53

| rowspan=2|⁵³Sc

| rowspan=2 style="text-align:right" | 21

| rowspan=2 style="text-align:right" | 32

| rowspan=2|52.958379(19)

| rowspan=2|2.4(6) s

| β⁻

| ⁵³Ti

| rowspan=2|(7/2−)

| rowspan=2|

| β⁻, n?

| ⁵²Ti

|-id=Scandium-54

| rowspan=2|⁵⁴Sc

| rowspan=2 style="text-align:right" | 21

| rowspan=2 style="text-align:right" | 33

| rowspan=2|53.963029(15)

| rowspan=2|526(15) ms

| β⁻ (84%)

| ⁵⁴Ti

| rowspan=2|(3)+

| rowspan=2|

| β⁻, n (16%)

| ⁵³Ti

|-id=Scandium-54m

| style="text-indent:1em" | ^54mSc

| colspan="3" style="text-indent:2em" | 110.5(3) keV

| 2.77(2) μs

| IT

| ⁵⁴Sc

| (5+,4+)

|-id=Scandium-55

| rowspan=3|⁵⁵Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 34

| rowspan=3|54.966890(67)

| rowspan=3|96(2) ms

| β⁻ (83%)

| ⁵⁵Ti

| rowspan=3|(7/2)−

| rowspan=3|

| β⁻, n (17%)

| ⁵⁴Ti

| β⁻, 2n?

| ⁵³Ti

|-id=Scandium-56

| rowspan=3|⁵⁶Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 35

| rowspan=3|55.97261(28)

| rowspan=3|26(6) ms

| β⁻

| ⁵⁶Ti

| rowspan=3|(1+)

| rowspan=3|

| β⁻, n?

| ⁵⁵Ti

| β⁻, 2n?

| ⁵⁴Ti

|-id=Scandium-56m1

| rowspan=3 style="text-indent:1em" | ^56m1ScOrder of ground state and isomer is uncertain.

| rowspan=3 colspan="3" style="text-indent:2em" | 0(100)# keV

| rowspan=3|75(6) ms

| β⁻ (<88%)

| ⁵⁶Ti

| rowspan=3|(6+,5+)

| rowspan=3|

| β⁻, n (>12%)

| ⁵⁵Ti

| β⁻, 2n?

| ⁵⁴Ti

|-id=Scandium-56m2

| style="text-indent:1em" | ^56m2Sc

| colspan="3" style="text-indent:2em" | 775.0(1) keV

| 290(17) ns

| IT

| ⁵⁶Sc

| (4+)

|-id=Scandium-57

| rowspan=3|⁵⁷Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 36

| rowspan=3|56.97705(19)

| rowspan=3|22(2) ms

| β⁻

| ⁵⁷Ti

| rowspan=3|7/2−#

| rowspan=3|

| β⁻, n?

| ⁵⁶Ti

| β⁻, 2n?

| ⁵⁵Ti

|-id=Scandium-58

| rowspan=3|⁵⁸Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 37

| rowspan=3|57.98338(20)

| rowspan=3|12(5) ms

| β⁻

| ⁵⁸Ti

| rowspan=3|3+#

| rowspan=3|

| β⁻, n?

| ⁵⁷Ti

| β⁻, 2n?

| ⁵⁶Ti

|-id=Scandium-58m

| style="text-indent:1em" | ^58mSc

| colspan="3" style="text-indent:2em" | 1420.7(22) keV

| 0.60(13) μs

| IT

| ⁵⁸Sc

|-id=Scandium-59

| rowspan=3|⁵⁹Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 38

| rowspan=3|58.98837(27)

| rowspan=3|12# ms
[>620 ns]

| β⁻?

| ⁵⁹Ti

| rowspan=3|7/2−#

| rowspan=3|

| β⁻, n?

| ⁵⁸Ti

| β⁻, 2n?

| ⁵⁷Ti

|-id=Scandium-60

| rowspan=3|⁶⁰Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 39

| rowspan=3|59.99512(54)#

| rowspan=3|10# ms
[>620 ns]

| β⁻?

| ⁶⁰Ti

| rowspan=3|3+#

| rowspan=3|

| β⁻, n?

| ⁵⁹Ti

| β⁻, 2n?

| ⁵⁸Ti

|-id=Scandium-61

| rowspan=3|⁶¹Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 40

| rowspan=3|61.00054(64)#

| rowspan=3|7# ms
[>620 ns]

| β⁻?

| ⁶¹Ti

| rowspan=3|7/2-#

| rowspan=3|

| β⁻, n?

| ⁶⁰Ti

| β⁻, 2n?

| ⁵⁹Ti

|-id=Scandium-62

| rowspan=3|⁶²Sc

| rowspan=3 style="text-align:right" | 21

| rowspan=3 style="text-align:right" | 41

| rowspan=3|62.00785(64)#

| rowspan=3|2# ms
[>400 ns]

| β⁻?

| ⁶²Ti

| rowspan=3|

| β⁻, n?

| ⁶¹Ti

| β⁻, 2n?

| ⁶⁰Ti

References

{{cite journal|last1=Audi|first1=G.|last2=Kondev|first2=F.G.|last3=Wang|first3=M.|last4=Huang|first4=W.J.| last5=Naimi|first5=S.|title=The NUBASE2016 evaluation of nuclear properties|url=http://amdc.in2p3.fr/nubase/2017Audi03.pdf|journal=Chinese Physics C|volume=41|issue=3|date=2017|pages=030001|doi=10.1088/1674-1137/41/3/030001}}
Isotope masses from:
{{NUBASE 2003}}
Half-life, spin, and isomer data selected from the following sources.
{{NUBASE 2003}}
{{NNDC}}
{{CRC85|chapter=11}}

Category:Scandium

Scandium