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圖表
符號 | Z(p ) | N(n ) | 同位素質量(u) | 半衰期 | 衰變 方式[4][n 1] |
衰變 產物 |
原子核 自旋 |
---|---|---|---|---|---|---|---|
激發能量 | |||||||
255Db | 105 | 150 | 255.10707(45)# | 1.7(5) s | α (~80%) | 251Lr | |
SF (~20%) | (various) | ||||||
256Db | 105 | 151 | 256.10789(26)# | 1.9(4) s [1.6(+5−3) s] |
α (~64%) | 252Lr | |
SF (~0.02%) | (various) | ||||||
β+ (~36%) | 256Rf | ||||||
257Db | 105 | 152 | 257.10758(22)# | 1.53(17) s [1.50(+19−15) s] |
α (>94%) | 253Lr | (9/2+) |
SF (<6%) | (various) | ||||||
β+ (1%) | 257Rf | ||||||
257mDb | 140(100)# keV | 0.67(6) s | α (>87%) | 253Lr | (1/2−) | ||
SF (<13%) | (various) | ||||||
β+ (1#%) | 257Rf | ||||||
258Db | 105 | 153 | 258.10929(33)# | 4.5(4) s | α (64%) | 254Lr | |
β+ (36%) | 258Rf | ||||||
SF (<1%) | (various) | ||||||
258mDb[n 2] | 60(100)# keV | 1.9(5) s | β+ | 258Rf | |||
IT (不常見) | 258Db | ||||||
259Db | 105 | 154 | 259.10949(6) | 0.51(16) s | α | 255Lr | |
260Db | 105 | 155 | 260.1113(1)# | 1.52(13) s | α (>90.4%) | 256Lr | |
SF (<9.6%) | (various) | ||||||
β+ (<2.5%) | 260Rf | ||||||
260mDb[n 2] | 200(150)# keV | 19 s | |||||
261Db | 105 | 156 | 261.11192(12)# | 4.5(1.1) s | SF (73%) | (various) | |
α (27%) | 257Lr | ||||||
262Db | 105 | 157 | 262.11407(15)# | 35(5) s | SF (~67%) | (various) | |
α (~30%) | 258Lr | ||||||
β+ (3#%) | 262Rf | ||||||
263Db | 105 | 158 | 263.11499(18)# | 29(9) s [27(+10−7) s] |
SF (~56%) | (various) | |
α (~37%) | 259Lr | ||||||
β+ (~6.9%)[n 3] | 263Rf | ||||||
266Db[n 4] | 105 | 161 | 266.12103(30)# | 80(70) min | SF | (various) | |
ε | 266Rf | ||||||
267Db[n 5] | 105 | 162 | 267.12247(44)# | 4.6(3.7) h | SF | (various) | |
268Db[n 6] | 105 | 163 | 268.12567(57)# | 30.8(5.0) h | SF (~100%) | (various) | |
ε [n 7] | 268Rf | ||||||
270Db[n 8] | 105 | 165 | 270.13136(64)# | 1.1 (+1.5−0.4) h[5] | SF (17%) | (various) | |
α (83%) | 266Lr |
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 | → |
鑪的同位素 | 𨧀的同位素 | 𨭎的同位素 |
註釋
- ↑ Abbreviations:
EC: Electron capture
IT: Isomeric transition
SF: Spontaneous fission - ↑ 2.0 2.1 Existence of this isomer is unconfirmed
- ↑ Heaviest nuclide known to undergo β+ decay
- ↑ Not directly synthesized, occurs in the decay chain of 282Nh
- ↑ Not directly synthesized, occurs in the decay chain of 287Mc
- ↑ Not directly synthesized, occurs in the decay chain of 288Mc
- ↑ Heaviest nuclide known to undergo electron capture
- ↑ Not directly synthesized, occurs in the decay chain of 294Ts
參考文獻
- ↑ Münzenberg, G.; Gupta, M. Production and Identification of Transactinide Elements: 877. 2011. doi:10.1007/978-1-4419-0720-2_19.
- ↑ 2.0 2.1 2.2 2.3 2.4 Six New Isotopes of the Superheavy Elements Discovered . Berkeley Lab. News center. October 26, 2010
- ↑ Oganessian, Yuri Ts.; Abdullin, F. Sh.; Bailey, P. D.; et al. Synthesis of a New Element with Atomic Number Z=117. Physical Review Letters (American Physical Society). 2010-04-09, 104 (142502) [2018-01-30]. Bibcode:2010PhRvL.104n2502O. PMID 20481935. doi:10.1103/PhysRevLett.104.142502.
- ↑ Universal Nuclide Chart. nucleonica. [2015-11-04].
- ↑ Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. 48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr. Physical Review Letters. 2014, 112 (17): 172501 [2015-11-04]. doi:10.1103/PhysRevLett.112.172501.
- 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).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683–800, (2003) and Atomic Weights Revised (2005).
- 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, Nuc. Phys. A 729, pp. 3–128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (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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