介绍
组: 8 or VIII B
原子量: 277
期: 7
CAS号码: 54037-57-9
分类
描述 • 用途/功能
This element was first synthesized and identified in 1984 by the same G.S.I. Darmstadt group who first identified Elements 107 and 109. Presumably this element will have chemical properties similar to osmium. Isotope 265108 was produced using a beam of 58Fe projectiles, produced by the Universal Linear Accelerator (UNILAC) to bombard a 208Pb target. Discovery of Elements 107 and 109 was made using detection of isotopes with odd proton and neutron numbers. Elements having even atomic numbers are thought to be less stable against spontaneous fusion than odd elements. The production of 265108 in the same reaction as was used at G.S.I. was confirmed at Dubna with detection of the 7th member of the decay chain 253Es. Isotopes of Element 108 were believed to decay by spontaneous fission, explaining why 109 was produced before 108. Isotope 265108 and 266108 are thought to decay to 261106, which in turn decays to 257104 and 253No. The IUPAC adopted the name hassium, after the German state of Hesse, in 1997. 1
物理性能
密度: g/cm3
电子组态: [Rn] 7s2 5f14 6d6
n = 6
* - at 1 atm
电子组态
块: d
最高占据能级: 7
价电子:
量子数:
ℓ = 2
mℓ = -2
ms = -½
粘接
同位素
核素
块 2
半衰期 2
核自旋 2
结合能
263Hs
263.12856(37)#
1# ms
7/2+#
1,926.48 MeV
264Hs
264.12839(5)
540(300) μs
0+
1,934.55 MeV
265Hs
265.13009(15)#
2.1(3) ms [2.0(+3-2) ms]
9/2+#
1,933.31 MeV
266Hs
266.13010(31)#
2.7(10) ms [2.3(+13-6) ms]
0+
1,941.38 MeV
267Hs
267.13179(11)#
32(15) ms
3/2+#
1,949.45 MeV
268Hs
268.13216(44)#
2# s
0+
1,957.52 MeV
269Hs
269.13406(13)#
27(17) s
1,965.59 MeV
270Hs
270.13465(31)#
3.6(+8-14) s
0+
1,973.66 MeV
271Hs
271.13766(36)#
40# s
1,981.74 MeV
272Hs
272.13905(62)#
40# s
0+
1,989.81 MeV
273Hs
273.14199(89)#
50# s
(3/2+)#
1,988.56 MeV
274Hs
274.14313(70)#
1# min
0+
1,996.64 MeV
275Hs
275.14595(77)#
0.15(+27-6) s
2,004.71 MeV
276Hs
276.14721(89)#
1# h
0+
2,012.78 MeV
277Hs
277.14984(78)#
40(30) min
3/2+#
2,020.85 MeV
值标记＃不是纯粹从实验数据得出，但至少部分来自系统的发展趋势。旋转弱任务参数都包含在括号中。 2
丰富
安全信息
材料安全数据表 - ACI Alloys, Inc.
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外部链接:
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Chemical Elements
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Environmental Chemistry
来源
(1) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4:14.
(2) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; pp 6:123-6:137.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; pp 6:107-6:122.
(4) - Atomic Mass Data Center. http://amdc.in2p3.fr/web/nubase_en.html (accessed July 14, 2009).