鍩的同位素
| ||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||
鍩是人造元素,沒有穩定同位素,也無法確認標準原子質量。它有從248No至260No及262No這14種同位素,以及眾多同核異構體。其中,259No最穩定,半衰期58分鐘。
圖表[編輯]
符號 | Z( p ) |
N( n ) |
同位素質量(u) | 半衰期 | 衰變 方式[1][n 1] |
衰變 產物 |
原子核 自旋 |
---|---|---|---|---|---|---|---|
激發能量 | |||||||
248No | 102 | 146 | 248.08655(24)# | <2 µs | 0+ | ||
249No | 102 | 147 | 249.0878(3)# | 57(12) s [54(+15−10) s] |
5/2+# | ||
250No | 102 | 148 | 250.08756(22)# | 5.7(8) s | SF (99.95%) | (various) | 0+ |
α (.05%) | 246Fm | ||||||
β+ (2.5×10−4%) | 250Md | ||||||
251No | 102 | 149 | 251.08894(12)# | 0.78(2) s | α (89%) | 247Fm | 7/2+# |
SF (10%) | (various) | ||||||
β+ (1%) | 251Md | ||||||
251mNo | 110(180)# keV | 1.7(10) s | 9/2−# | ||||
252No | 102 | 150 | 252.088967(10) | 2.27(14) s | α (73.09%) | 248Fm | 0+ |
SF (26.9%) | (various) | ||||||
β+ (1%) | 252Md | ||||||
253No[n 2] | 102 | 151 | 253.090564(7) | 1.62(15) min | α (80%) | 249Fm | (9/2−)# |
β+ (20%) | 253Md | ||||||
SF (10−3%) | (various) | ||||||
253mNo | 129(19) keV | 31 s | 5/2+# | ||||
254No | 102 | 152 | 254.090956(11) | 51(10) s | α (89.3%) | 250Fm | 0+ |
β+ (10%) | 254Md | ||||||
SF (.31%) | (various) | ||||||
254mNo | 500(100)# keV | 0.28(4) s | IT (80%) | 254No | 0+ | ||
α (20%) | 250Fm | ||||||
255No | 102 | 153 | 255.093191(16) | 3.1(2) min | α (61.4%) | 251Fm | (1/2+) |
β+ (38.6%) | 255Md | ||||||
256No | 102 | 154 | 256.094283(8) | 2.91(5) s | α (99.44%) | 252Fm | 0+ |
SF (.55%) | (various) | ||||||
ε (.01%) | 256Md | ||||||
257No | 102 | 155 | 257.096888(7) | 25(2) s | α (99%) | 253Fm | (7/2+) |
β+ (1%) | 257Md | ||||||
258No | 102 | 156 | 258.09821(11)# | 1.2(2) ms | SF (99.99%) | (various) | 0+ |
α (.01%) | 254Fm | ||||||
β+β+ (不常見) | 258Fm | ||||||
259No | 102 | 157 | 259.10103(11)# | 58(5) min | α (75%) | 255Fm | (9/2+)# |
ε (25%) | 259Md | ||||||
SF (10%) | (various) | ||||||
260No | 102 | 158 | 260.10264(22)# | 106(8) ms | SF | (various) | 0+ |
262No[n 3] | 102 | 160 | 262.10746(39)# | ~5 ms | SF | (various) | 0+ |
備註:畫上#號的數據代表沒有經過實驗的證明,只是理論推測而已,而用括號括起來的代表數據不確定性。
← | 同位素列表 | → |
鍆的同位素 | 鍩的同位素 | 鐒的同位素 |
註釋[編輯]
- ^ Abbreviations:
EC: Electron capture
IT: Isomeric transition
SF: Spontaneous fission - ^ Not directly synthesized, occurs as decay product of 257Rf
- ^ Not directly synthesized, occurs as decay product of 262Lr
參考文獻[編輯]
- ^ Universal Nuclide Chart. nucleonica. [2015-11-03]. (原始內容存檔於2017-02-19).
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties (頁面存檔備份,存於網際網路檔案館), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (頁面存檔備份,存於網際網路檔案館) (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
元素與同位素的穩定度 | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|