鑀的同位素
外觀
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鑀有從240Es至257Es共18種同位素,其中252Es最穩定,半衰期471.7日(1.291年)。
圖表
[編輯]符號 | Z | N | 同位素質量(u) [n 1][n 2] |
半衰期 [n 1][n 2] |
衰變 方式[1] |
衰變 產物 |
原子核 自旋[n 1] |
---|---|---|---|---|---|---|---|
激發能量[n 1][n 2] | |||||||
240Es | 99 | 141 | 240.06892(43)# | 1# s | α | 236Bk | |
β+ (不常見) | 240Cf | ||||||
241Es | 99 | 142 | 241.06854(24)# | 10(5) s [8(+6−5) s] |
α | 237Bk | (3/2−) |
β+ (不常見) | 241Cf | ||||||
242Es | 99 | 143 | 242.06975(35)# | 13.5(25) s | α (99.94%) | 238Bk | |
β+, SF (.6%) | (various) | ||||||
β+ (不常見) | 242Cf | ||||||
243Es | 99 | 144 | 243.06955(25)# | 21(2) s | β+ (70%) | 243Cf | 3/2−# |
α (30%) | 239Bk | ||||||
244Es | 99 | 145 | 244.07088(20)# | 37(4) s | β+ (94.69%) | 244Cf | |
α (5.3%) | 240Bk | ||||||
β+, SF (.01%) | (various) | ||||||
245Es | 99 | 146 | 245.07132(22)# | 1.1(1) min | β+ (60%) | 245Cf | (3/2−) |
α (40%) | 241Bk | ||||||
246Es | 99 | 147 | 246.07290(24)# | 7.7(5) min | β+ (90.1%) | 246Cf | 4−# |
α (9.9%) | 242Bk | ||||||
β+, SF (.003%) | (various) | ||||||
247Es | 99 | 148 | 247.07366(3)# | 4.55(26) min | β+ (93%) | 247Cf | 7/2+# |
α (7%) | 243Bk | ||||||
SF (9×10−5%) | (various) | ||||||
248Es | 99 | 149 | 248.07547(6)# | 27(5) min | β+ (99.75%) | 248Cf | 2−#,0+# |
α (.25%) | 244Bk | ||||||
β+, SF (3×10−5%) | (various) | ||||||
249Es | 99 | 150 | 249.07641(3)# | 102.2(6) min | β+ (99.43%) | 249Cf | 7/2+ |
α (.57%) | 245Bk | ||||||
250Es | 99 | 151 | 250.07861(11)# | 8.6(1) h | β+ (97%) | 250Cf | (6+) |
α (3%) | 246Bk | ||||||
250mEs | 200(150)# keV | 2.22(5) h | ε (99%) | 250Cf | 1(−) | ||
α (1%) | 246Bk | ||||||
251Es | 99 | 152 | 251.079992(7) | 33(1) h | ε (99.51%) | 251Cf | (3/2−) |
α (.49%) | 247Bk | ||||||
252Es | 99 | 153 | 252.08298(5) | 471.7(19) d | α (76%) | 248Bk | (5−) |
ε (24%) | 252Cf | ||||||
β− (.01%) | 252Fm | ||||||
253Es[n 3] | 99 | 154 | 253.0848247(28) | 20.47(3) d | α | 249Bk | 7/2+ |
SF (8.7×10−6%) | (various) | ||||||
254Es | 99 | 155 | 254.088022(5) | 275.7(5) d | α | 250Bk | (7+) |
ε (10−4%) | 254Cf | ||||||
SF (3×10−6%) | (various) | ||||||
β− (1.74×10−6%) | 254Fm | ||||||
254mEs | 84.2(25) keV | 39.3(2) h | β− (98%) | 254Fm | 2+ | ||
IT (3%) | 254Es | ||||||
α (.33%) | 250Bk | ||||||
ε (.078%) | 254Cf | ||||||
SF (.0045%) | (various) | ||||||
255Es | 99 | 156 | 255.090273(12) | 39.8(12) d | β− (92%) | 255Fm | (7/2+) |
α (8%) | 251Bk | ||||||
SF (.0041%) | (various) | ||||||
256Es | 99 | 157 | 256.09360(11)# | 25.4(24) min | β− | 256Fm | (1+,0−) |
256mEs | 0(100)# keV | 7.6 h | β− (99.99%) | 256Fm | (8+) | ||
β−, SF (.002%) | (various) | ||||||
257Es | 99 | 158 | 257.09598(44)# | 7.7(2) d | β− | 257Fm | 7/2+# |
α | 253Bk | ||||||
258Es | 99 | 159 | 258.09952(32)# | 3# min |
← | 同位素列表 | → |
鐦的同位素 | 鑀的同位素 | 鐨的同位素 |
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,存於互聯網檔案館), 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,存於互聯網檔案館) (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.
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