ایزوتوپ‌های بور
عنصر بور به طور طبیعی دارای دو ایزوتوپ طبیعی 10B و 11B است. همچنین ایزوتوپ‌های با جرم اتمی ۶ تا ۲۱ بور، ناپایدار بوده و نیمه عمر بسیار اندک دارند.
جدول ایزوتوپ ها
| نماد | Z(p) | N(n) | جرم ایزوتوپ (u) |
نیمه عمر | حالت واپاشی[1] | daughter isotope(s) |
اسپین هسته ای | representative isotopic composition (درصد مولی) |
range of natural variation (درصد مولی) |
|---|---|---|---|---|---|---|---|---|---|
| 6B | 5 | 1 | 6.04681(75)# | ||||||
| 7B | 5 | 2 | 7.02992(8) | 350(50)×10−24 s [1.4(2) MeV] |
p | 6 Be[n 1] |
(3⁄2−) | ||
| 8B[n 2] | 5 | 3 | 8.0246072(11) | 770(3) ms | β+, fission | 2 4 He |
2+ | ||
| 9B | 5 | 4 | 9.0133288(11) | 800(300)×10−21 s [0.54(21) keV] |
p | 8 Be[n 3] |
3⁄2− | ||
| 10B | 5 | 5 | 10.0129370(4) | Stable | 3+ | 19.9(7) | 18.929 – 20.386 | ||
| 11B | 5 | 6 | 11.0093054(4) | پایدار | 3⁄2− | 80.1(7) | 79.614–81.071 | ||
| 12B | 5 | 7 | 12.0143521(15) | 20.20(2) ms | β− (98.4%) | 12 C |
1+ | ||
| β−, α (1.6%) | 8 Be[n 4] | ||||||||
| 13B | 5 | 8 | 13.0177802(12) | 17.33(17) ms | β− (99.72%) | 13 C |
3⁄2− | ||
| β−, n (0.279%) | 12 C | ||||||||
| 14B | 5 | 9 | 14.025404(23) | 12.5(5) ms | β− (93.96%) | 14 C |
2− | ||
| β−, n (6.04%) | 13 C | ||||||||
| 15B | 5 | 10 | 15.031103(24) | 9.87(7) ms | β−, n (93.6%) | 14 C |
3⁄2− | ||
| β− (6.0%) | 15 C | ||||||||
| β−, 2n (0.40%) | 13 C | ||||||||
| 16B | 5 | 11 | 16.03981(6) | <190×10−12 s [<0.1 MeV] |
n | 15 B |
0− | ||
| 17B[n 5] | 5 | 12 | 17.04699(18) | 5.08(5) ms | β−, n (63.0%) | 16 C |
(3⁄2−) | ||
| β− (22.1%) | 17 C | ||||||||
| β−, 2n (11.0%) | 15 C | ||||||||
| β−, 3n (3.5%) | 14 C | ||||||||
| β−, 4n (0.40%) | 13 C | ||||||||
| 18B | 5 | 13 | 18.05617(86)# | <26 ns | n | 17 B |
(4−)# | ||
| 19B[n 5] | 5 | 14 | 19.06373(43)# | 2.92(13) ms | β− | 19 C |
(3⁄2−)# | ||
- Subsequently decays by double proton emission to 4He for a net reaction of 7B → 4He + 3 1H
- Has 1 halo proton
- immediately decays into two α particles, for a net reaction of 9B → 2 4He + 1H
- Immediately decays into two α particles, for a net reaction of 12B → 3 4He + e−
- Has 2 halo neutrons
منابع
منابع عمومی
- Isotope masses from:
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001.
- Isotopic compositions and standard atomic masses from:
- J. R. de Laeter, J. K. Böhlke, P. De Bièvre, H. Hidaka, H. S. Peiser, K. J. R. Rosman and P. D. P. Taylor (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
- M. E. Wieser (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051. Lay summary.
- Half-life, spin, and isomer data selected from the following sources. See editing notes on this article's talk page.
- G. Audi, A. H. Wapstra, C. Thibault, J. Blachot and O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001.
- National Nuclear Data Center. "NuDat 2.1 database". Brookhaven National Laboratory. Retrieved September 2005. Check date values in:
|accessdate=(help) - N. E. Holden (2004). "Table of the Isotopes". In D. R. Lide. CRC Handbook of Chemistry and Physics (85th ed.). CRC Press. Section 11. ISBN 978-0-8493-0485-9.
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