114号、116号元素被命名-凯发k8官网

114号、116号元素被命名
文章来源:未知 文章作者:enread 发布时间:2011-12-02 02:15 字体: [ ] 
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the international union of pure and 1 chemistry (iupac) have recommended new proposed names for elements 114 and 116, the latest heavy elements to be added to the periodic table(周期表) . scientists of the lawrence livermore national laboratory (llnl)-dubna 2 proposed the names as flerovium for element 114 and livermorium for element 116.

in june 2011, the iupac officially accepted elements 114 and 116 as the heaviest elements, more than 10 years after scientists from the 3 institute for nuclear research in dubna and lawrence livermore chemists discovered them.

flerovium (atomic symbol fl) was chosen to honor flerov laboratory of nuclear reactions, where superheavy elements, including element 114, were synthesized. georgiy n. flerov (1913-1990) was a 4(著名的) 5 who discovered the spontaneous 6 of uranium and was a pioneer in heavy-ion physics. he is the 7 of the joint institute for nuclear research. in 1991, the laboratory was named after flerov -- flerov laboratory of nuclear reactions (flnr).

livermorium (atomic symbol lv) was chosen to honor lawrence livermore national laboratory (llnl) and the city of livermore, calif. a group of researchers from the laboratory, along with scientists at the flerov laboratory of nuclear reactions, participated in the work carried out in dubna on the synthesis of superheavy elements, including element 116. (lawrencium -- element 103 -- was already named for llnl's founder e.o. lawrence.)

in 1989, flerov and 8 hulet (1926-2010) of llnl established collaboration between scientists at llnl and scientists at flnr; one of the results of this long-standing collaboration was the synthesis of elements 114 and 116.

"proposing these names for the elements honors not only the individual contributions of scientists from these laboratories to the fields of nuclear science, heavy element research, and superheavy element research, but also the phenomenal cooperation and collaboration that has occurred between scientists at these two locations," said bill goldstein, associate director of llnl's physical and life sciences directorate.

llnl scientists ken 9, dawn shaughnessy, jackie kenneally and mark stoyer were critical members of the team along with a team of 10 llnl scientists including john wild, ron lougheed and jerry landrum. former llnl scientists nancy stoyer, carola gregorich, jerry landrum, joshua patin and philip wilk also were on the team. the research was supported by llnl laboratory research and development funds (ldrd).

scientists at llnl have been involved in heavy element research since the laboratory's 11(起初,获得学位) in 1952 and have been collaborators in the discovery of six elements -- 113,114,115,116,117 and 118.

livermore also has been at the forefront(最前线) of 12 into other areas related to nuclear science such as cross-section measurements, nuclear theory, radiochemical diagnostics of laser-induced reactions, separations chemistry including rapid 13 aqueous separations, actinide chemistry, heavy-element target fabrication, and nuclear forensics.

the creation of elements 116 and 114 involved smashing 14 ions (with 20 protons each) into a curium target (96 protons) to create element 116. element 116 decayed almost immediately into element 114. the scientists also created element 114 separately by replacing curium with a plutonium target (94 protons).

the creation of elements 114 and 116 generate hope that the team is on its way to the "island of stability," an area of the periodic table in which new heavy elements would be stable or last long enough for applications to be found.

the new names were submitted to the iupac in late october and now remain in the public 15. the new names will not be official until about five months from now when the public comment period is over.



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1 tz2zxa     
adj.应用的;v.应用,适用
参考例句:
  • she plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • this cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
2 bw7yd     
n.合作,协作;勾结
参考例句:
  • the two companies are working in close collaboration each other.这两家公司密切合作。
  • he was shot for collaboration with the enemy.他因通敌而被枪毙了。
3 m3lx4     
adj.联合的,共同的;n.关节,接合处;v.连接,贴合
参考例句:
  • i had a bad fall,which put my shoulder out of joint.我重重地摔了一跤,肩膀脫臼了。
  • we wrote a letter in joint names.我们联名写了封信。
4 okszve     
adj.著名的,有名望的,声誉鹊起的
参考例句:
  • he is one of the world's renowned writers.他是世界上知名的作家之一。
  • she is renowned for her advocacy of human rights.她以提倡人权而闻名。
5 onqx4     
n.物理学家,研究物理学的人
参考例句:
  • he is a physicist of the first rank.他是一流的物理学家。
  • the successful physicist never puts on airs.这位卓有成就的物理学家从不摆架子。
6 wjtxu     
n.裂开;分裂生殖
参考例句:
  • the fission of the cell could be inhibited with certain chemicals.细胞的裂变可以通过某些化学药品加以抑制。
  • nuclear fission releases tremendous amounts of energy.核裂变释放出巨大的能量。
7 wigxf     
n.创始者,缔造者
参考例句:
  • he was extolled as the founder of their florentine school.他被称颂为佛罗伦萨画派的鼻祖。
  • according to the old tradition,romulus was the founder of rome.按照古老的传说,罗穆卢斯是古罗马的建国者。
8 k3wxv     
n.视野,知识领域
参考例句:
  • such things are beyond my ken.我可不懂这些事。
  • abstract words are beyond the ken of children.抽象的言辞超出小孩所理解的范围.
9 xexxg     
adj.心情不稳的,易怒的,喜怒无常的
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  • he relapsed into a moody silence.他又重新陷于忧郁的沉默中。
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10 njhzyv     
adj.隐退的,退休的,退役的
参考例句:
  • the old man retired to the country for rest.这位老人下乡休息去了。
  • many retired people take up gardening as a hobby.许多退休的人都以从事园艺为嗜好。
11 bxyyz     
n.开端,开始,取得学位
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  • the programme has been successful since its inception.这个方案自开始实施以来一直卓有成效。
  • julia's worked for that company from its inception.自从那家公司开办以来,朱莉娅一直在那儿工作。
12 02de25420938593f7db7bd4052010b32     
(正式的)调查( investigation的名词复数 ); 侦查; 科学研究; 学术研究
参考例句:
  • his investigations were intensive and thorough but revealed nothing. 他进行了深入彻底的调查,但没有发现什么。
  • he often sent them out to make investigations. 他常常派他们出去作调查。
13 fybzf9     
a.自动化的
参考例句:
  • the entire manufacturing process has been automated. 整个生产过程已自动化。
  • automated highway system (ahs) is recently regarded as one subsystem of intelligent transport system (its). 近年来自动公路系统(automated highway system,ahs),作为智能运输系统的子系统之一越来越受到重视。
14 sndzy     
n.钙(化学符号ca)
参考例句:
  • we need calcium to make bones.我们需要钙来壮骨。
  • calcium is found most abundantly in milk.奶含钙最丰富。
15 ys8xc     
n.(活动等)领域,范围;领地,势力范围
参考例句:
  • this information should be in the public domain.这一消息应该为公众所知。
  • this question comes into the domain of philosophy.这一问题属于哲学范畴。
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