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berkelium    
n. 放射性元素,符号Bk,原子序为98

放射性元素,符号Bk,原子序为98

berkelium
n 1: a radioactive transuranic element; discovered by bombarding
americium with helium [synonym: {berkelium}, {Bk}, {atomic
number 97}]

berkelium \ber*ke"li*um\ (b[~e]r*k[=e]"l[-e]*[u^]m), n. [from
the city of Berkeley, California, location of the University
of California campus where it was discovered.]
a chemical element of the transuranic series. Chemical symbol
Bk; atomic number 97; atomic weight 247. It is a radioactive
element, with no stable isotopes; the longest-lived isotope
is of mass number 247.07, decaying by alpha-emission with a
half-life of 1,400 years. The isotope with atomic weight 249
has a half-life of 314 days, and was isolated in weighable
quantities.

Syn: Bk.
[WordNet 1.5 PJC]


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  • Berkelium - Wikipedia
    Berkelium is a soft, silvery-white, radioactive metal The berkelium-249 isotope emits low-energy beta particles and thus is relatively safe to handle It decays with a half-life of 330 days to californium -249, which is a strong emitter of ionizing alpha particles
  • What Is Berkelium Used For and Why Is It So Rare . . .
    Berkelium has no commercial, industrial, or medical applications It is a synthetic radioactive element produced in extremely tiny quantities, and its uses are confined entirely to scientific research
  • Scientists Discover Two New Isotopes----Institute of Modern . . .
    Scientists from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) and their collaborators have successfully synthesized two new isotopes, berkelium-235 and americium-231, at the Heavy Ion Research Facility in Lanzhou
  • Chinese scientists have successfully synthesized two new . . .
    China Science (@ChinaScience) 82 likes Chinese scientists have successfully synthesized two new isotopes, berkelium-235, and its alpha-decay daughter nucleus, americium-231, pushing the boundaries of the periodic table and helping better understand the building blocks of matter Published in the journal Physics Letters B, the study provides important experimental evidence for understanding
  • Scientists Synthesize Two New Heavy Nuclei, Expanding . . .
    Both are deep in neutron-deficient territory, and Bk-235 previously appeared as a blank: known berkelium isotopes ran from 233 to 253 but skipped 235 entirely The measured alpha energies now help benchmark nuclear mass models in a region where shell structure and deformation interact in ways that theory has struggled to predict without
  • Scientists Successfully Synthesize New Nuclides Berkelium-235 . . .
    Scientists Successfully Synthesize New Nuclides Berkelium-235 and Americium-231 The Institute of Modern Physics, Chinese Academy of Sciences, announced that its superheavy nucleus research team and collaborators at the National Key Laboratory of Heavy Ion Science and Technology recently successfully synthesized the new nuclide berkelium-235 and its alpha decay nucleus americium-231 for the
  • Berkelium | XPS Periodic Table | Thermo Fisher Scientific - TR
    The fifth transuranic element to be synthesized, berkelium was discovered late in 1949 by Glenn T Seaborg, Stanley G Thompson, and Albert Ghiorso, who produced it by bombarding americium-241 with alpha particles in the cyclotron of the University of California, Berkeley
  • New Berkelium-235 Americium-231 Isotopes | CAS IMP
    CAS IMP scientists synthesize berkelium-235 and americium-231 isotopes at HIRFL, providing key data for nuclear models Discover the experiment, results, and i…
  • Spectroscopic Characterization of Tetravalent Berkelium
    ABSTRACT We report X-ray absorption spectroscopy (XAS) studies of tetravalent berkelium (Bk) Chelation of BkIII by siderophore-inspired chelators stabilized BkIV under mild conditions, as confirme
  • Chinese Scientists Create 2 Never-before-seen Atomic Nuclei
    Scientists in China have created two new atomic nuclei that have never been observed before: Berkelium-235 and Americium-231 Their groundbreaking work pushes the boundaries of the periodic table and helps us better understand the building blocks of matter





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