einsteinium वाक्य
उदाहरण वाक्य
मोबाइल
- Mendelevium was discovered by bombarding einsteinium with alpha particles in 1955, the same method still used to produce it today.
- Using available microgram quantities of the isotope einsteinium-253, over a million mendelevium atoms may be produced each hour.
- This eliminates the need for immediate chemical separation, which is both costly and prevents reusing of the expensive einsteinium target.
- The reactor synthesis is followed by a complex process of separating einsteinium-253 from other actinides and products of their decay.
- Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.
- In particular, einsteinium was used to synthesize, for the first time, 17 atoms of the new element mendelevium in 1955.
- Thus, most einsteinium samples are contaminated, and their intrinsic properties are often deduced by extrapolating back experimental data accumulated over time.
- Milligrams of einsteinium that would normally take a year of irradiation in a high-power reactor, were produced within a microsecond.
- In order to reduce the self-radiation damage, most measurements of solid einsteinium and its compounds are performed right after thermal annealing.
- Einsteinium ( III ) fluoride ( EsF 3 ) can be precipitated from einsteinium ( III ) chloride solutions upon reaction with fluoride ions.
- Einsteinium ( III ) fluoride ( EsF 3 ) can be precipitated from einsteinium ( III ) chloride solutions upon reaction with fluoride ions.
- Chemical element " symbols " ( such as Cf for californium and Es for einsteinium ), are always capitalized ( see below ).
- The einsteinium separated by this method has the advantage to be free of organic complexing agent, as compared to the separation using a resin column.
- Irradiation of 241 Am by 12 C or 22 Ne ions yields the isotopes 247 Es ( einsteinium ) or 260 Db ( dubnium ), respectively.
- Other experimental techniques to circumvent the contamination problem include selective optical excitation of einsteinium ions by a tunable laser, such as in studying its luminescence properties.
- Irradiation of 241 Am by 12 C or 22 Ne ions yields the isotopes 253 Es ( einsteinium ) or 263 Db ( dubnium ), respectively.
- The high radioactivity of einsteinium-253 produces a visible glow and rapidly damages its crystalline metal lattice, with released heat of about 1000 watts per gram.
- Einsteinium-247 ( half-life 4.55 minutes ) was produced by irradiating americium-241 with carbon or uranium-238 with nitrogen ions.
- Einsteinium and fermium were discovered by a team of scientists led by Albert Ghiorso in 1952 while studying the radioactive debris from the detonation of the first hydrogen bomb.
- Of the actinides, environment; analysis of debris from a 1952 hydrogen bomb explosion showed the presence of americium, curium, berkelium, californium, einsteinium and fermium.
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