Isotopes of scandium

Template:Short description Template:Infobox scandium isotopes 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

Template:Isotopes table |-id=Scandium-37 | ³⁷Sc | 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 | 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" | ^56m1Sc | 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| | rowspan=3| |- | β⁻, n? | ⁶¹Ti |- | β⁻, 2n? | ⁶⁰Ti Template:Isotopes table/footer

See also

Daughter products other than scandium

• Isotopes of titanium
• Isotopes of calcium
• Isotopes of potassium
• Isotopes of argon

References

• Isotope masses from:
  • Template:NUBASE 2003
• Half-life, spin, and isomer data selected from the following sources.
  • Template:NUBASE 2003
  • Template:NNDC
  • Template:CRC85