Английская Википедия:Isotopes of scandium

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Шаблон:Short description Шаблон:Infobox scandium isotopes Naturally occurring scandium (₂₁Sc) is composed of one stable isotope, ⁴⁵Sc. Twenty-five 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 ^44m2Sc (t_1/2 58.6 h).

The isotopes of scandium range in atomic weight from 39 u (³⁹Sc) to 62 u (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

Шаблон:Isotopes table |- | ³⁹Sc | style="text-align:right" | 21 | style="text-align:right" | 18 | 38.984790(26) | <300 ns | p | ³⁸Ca | (7/2−)# | | |- | rowspan=3|⁴⁰Sc | rowspan=3 style="text-align:right" | 21 | rowspan=3 style="text-align:right" | 19 | rowspan=3|39.977967(3) | rowspan=3|182.3(7) ms | β⁺ (99.54%) | ⁴⁰Ca | rowspan=3|4− | rowspan=3| | rowspan=3| |- | β⁺, p (.44%) | ³⁹K |- | β⁺, α (.017%) | ³⁶Ar |- | ⁴¹Sc | style="text-align:right" | 21 | style="text-align:right" | 20 | 40.96925113(24) | 596.3(17) ms | β⁺ | ⁴¹Ca | 7/2− | | |- | ⁴²Sc | style="text-align:right" | 21 | style="text-align:right" | 21 | 41.96551643(29) | 681.3(7) ms | β⁺ | ⁴²Ca | 0+ | | |- | style="text-indent:1em" | ^42mSc | colspan="3" style="text-indent:2em" | 616.28(6) keV | 61.7(4) s | β⁺ | ⁴²Ca | (7, 5, 6)+ | | |- | ⁴³Sc | style="text-align:right" | 21 | style="text-align:right" | 22 | 42.9611507(20) | 3.891(12) h | β⁺ | ⁴³Ca | 7/2− | | |- | style="text-indent:1em" | ^43m1Sc | colspan="3" style="text-indent:2em" | 151.4(2) keV | 438(7) μs | | | 3/2+ | | |- | style="text-indent:1em" | ^43m2Sc | colspan="3" style="text-indent:2em" | 3123.2(3) keV | 470(4) ns | | | (19/2)− | | |- | ⁴⁴Sc | style="text-align:right" | 21 | style="text-align:right" | 23 | 43.9594028(19) | 3.97(4) h | β⁺ | ⁴⁴Ca | 2+ | | |- | style="text-indent:1em" | ^44m1Sc | colspan="3" style="text-indent:2em" | 67.8680(14) keV | 154.2(8) ns | | | 1− | | |- | rowspan=2 style="text-indent:1em" | ^44m2Sc | rowspan=2 colspan="3" style="text-indent:2em" | 270.95(20) keV | rowspan=2|58.61(10) h | IT (98.8%) | ⁴⁴Sc | rowspan=2| 6+ | rowspan=2| | rowspan=2| |- | β⁺ (1.2%) | ⁴⁴Ca |- | style="text-indent:1em" | ^44m3Sc | colspan="3" style="text-indent:2em" | 146.224(22) keV | 50.4(7) μs | | | 0− | | |- | ⁴⁵Sc | style="text-align:right" | 21 | style="text-align:right" | 24 | 44.9559119(9) | colspan=3 align=center|Stable | 7/2− | 1.0000 | |- | style="text-indent:1em" | ^45mSc | colspan="3" style="text-indent:2em" | 12.40(5) keV | 318(7) ms | IT | ⁴⁵Sc | 3/2+ | | |- | ⁴⁶Sc | style="text-align:right" | 21 | style="text-align:right" | 25 | 45.9551719(9) | 83.79(4) d | β⁻ | ⁴⁶Ti | 4+ | | |- | style="text-indent:1em" | ^46m1Sc | colspan="3" style="text-indent:2em" | 52.011(1) keV | 9.4(8) μs | | | 6+ | | |- | style="text-indent:1em" | ^46m2Sc | colspan="3" style="text-indent:2em" | 142.528(7) keV | 18.75(4) s | IT | ⁴⁶Sc | 1− | | |- | ⁴⁷Sc | style="text-align:right" | 21 | style="text-align:right" | 26 | 46.9524075(22) | 3.3492(6) d | β⁻ | ⁴⁷Ti | 7/2− | | |- | style="text-indent:1em" | ^47mSc | colspan="3" style="text-indent:2em" | 766.83(9) keV | 272(8) ns | | | (3/2)+ | | |- | ⁴⁸Sc | style="text-align:right" | 21 | style="text-align:right" | 27 | 47.952231(6) | 43.67(9) h | β⁻ | ⁴⁸Ti | 6+ | | |- | ⁴⁹Sc | style="text-align:right" | 21 | style="text-align:right" | 28 | 48.950024(4) | 57.2(2) min | β⁻ | ⁴⁹Ti | 7/2− | | |- | ⁵⁰Sc | style="text-align:right" | 21 | style="text-align:right" | 29 | 49.952188(17) | 102.5(5) s | β⁻ | ⁵⁰Ti | 5+ | | |- | 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 (97.5%) | ⁵⁰Sc | rowspan=2|2+, 3+ | rowspan=2| | rowspan=2| |- | β⁻ (2.5%) | ⁵⁰Ti |- | ⁵¹Sc | style="text-align:right" | 21 | style="text-align:right" | 30 | 50.953603(22) | 12.4(1) s | β⁻ | ⁵¹Ti | (7/2)− | | |- | ⁵²Sc | style="text-align:right" | 21 | style="text-align:right" | 31 | 51.95668(21) | 8.2(2) s | β⁻ | ⁵²Ti | 3(+) | | |- | rowspan=2|⁵³Sc | rowspan=2 style="text-align:right" | 21 | rowspan=2 style="text-align:right" | 32 | rowspan=2|52.95961(32)# | rowspan=2|2.4(0.6) s | β⁻ (>99.9%) | ⁵³Ti | rowspan=2|(7/2−)# | rowspan=2| | rowspan=2| |- | β⁻, n (<.1%) | ⁵²Ti |- | rowspan=2|⁵⁴Sc | rowspan=2 style="text-align:right" | 21 | rowspan=2 style="text-align:right" | 33 | rowspan=2|53.96326(40) | rowspan=2|260(30) ms | β⁻ (>99.9%) | ⁵⁴Ti | rowspan=2|3+# | rowspan=2| | rowspan=2| |- | β⁻, n (<.1%) | ⁵³Ti |- | style="text-indent:1em" | ^54mSc | colspan="3" style="text-indent:2em" | 110(3) keV | 7(5) μs | | | (5+) | | |- | rowspan=2|⁵⁵Sc | rowspan=2 style="text-align:right" | 21 | rowspan=2 style="text-align:right" | 34 | rowspan=2|54.96824(79) | rowspan=2|0.115(15) s | β⁻ (>99.9%) | ⁵⁵Ti | rowspan=2|7/2−# | rowspan=2| | rowspan=2| |- | β⁻, n (<.1%) | ⁵⁴Ti |- | ⁵⁶Sc | style="text-align:right" | 21 | style="text-align:right" | 35 | 55.97287(75)# | 35(5) ms | β⁻ | ⁵⁶Ti | (1+) | | |- | ⁵⁷Sc | style="text-align:right" | 21 | style="text-align:right" | 36 | 56.97779(75)# | 13(4) ms | β⁻ | ⁵⁷Ti | 7/2−# | | |- | ⁵⁸Sc | style="text-align:right" | 21 | style="text-align:right" | 37 | 57.98371(86)# | 12(5) ms | β⁻ | ⁵⁸Ti | (3+)# | | |- | rowspan=2|⁵⁹Sc | rowspan=2 style="text-align:right" | 21 | rowspan=2 style="text-align:right" | 38 | rowspan=2|58.98922(97)# | rowspan=2|10# ms | β⁻, n | ⁵⁸Ti | rowspan=2|7/2−# | rowspan=2| | rowspan=2| |- | β⁻ | ⁵⁹Ti |- | rowspan=3|⁶⁰Sc | rowspan=3 style="text-align:right" | 21 | rowspan=3 style="text-align:right" | 39 | rowspan=3|59.99571(97)# | rowspan=3|3# ms
(>620 ns) | β⁻ | ⁶⁰Ti | rowspan=3|3+# | rowspan=3| | rowspan=3| |- | β⁻, n | ⁵⁹Ti |- | β⁻, 2n | ⁵⁸Ti |- | rowspan=3|⁶¹Sc | rowspan=3 style="text-align:right" | 21 | rowspan=3 style="text-align:right" | 40 | rowspan=3|61.001(600)# | rowspan=3|2# ms
(>620 ns) | β⁻ | ⁶¹Ti | rowspan=3|7/2-# | rowspan=3| | rowspan=3| |- | β⁻, n | ⁶⁰Ti |- | β⁻, 2n | ⁵⁹Ti |- | 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| | rowspan=3| |- | β⁻, n? | ⁶¹Ti |- | β⁻, 2n? | ⁶⁰Ti Шаблон:Isotopes table/footer

References

• Шаблон:Cite journal
• Isotope masses from:
  • Шаблон:NUBASE 2003
• Isotopic compositions and standard atomic masses from:
  • Шаблон:CIAAW2003
  • Шаблон:CIAAW 2005
• Half-life, spin, and isomer data selected from the following sources.
  • Шаблон:NUBASE 2003
  • Шаблон:NNDC
  • Шаблон:CRC85