transfermium element

With the synthesis of heavy elements approaching the super heavy island,the production cross section becomes smaller and the lifetime of the super heavy element becomes longer,which results in the difficulties for identification of the elements by using conventional alpha decay chain technique.

随着合成的超重元素向超重岛逼近,合成截面越来越小,同时,合成的超重元素的寿命可能相对增长,这对利用α衰变链的传统方法鉴别超重元素是非常不利的。

Some restrictive factors of the limit of transuranium are discussed in this paper on the basis of philoscophical laws of the unity of opposites and the quantitative qualitative change.

以哲学的对立统一和量变质变两大基本规律为由头 ,考虑了超铀元素存在的若干限制因素 ,结论认为 :1。

Some problems are discussed in this paper which is“spale-restriction”,“time-restric- tion”and“cross-section-restriction on the transuranium s limit”.

本文讨论了超铀元素存在的“空间限制”、“时间限制”和“生成截面限制”。

The boundary limit of the periodic system is also one of the transuraniums.

作者认为超铀元素存在的界限(或极限)大体在Z=110-125号元素,而Z=114-120号元素将更有可能。

The α-decay lifetimes of the newly synthesized superheavy elements are calculated using the α-cluster model and the results are in good agreement with experimental data.

用α 结团模型计算新合成超重元素的半衰期 ,与已知的实验数据进行对比分析 ,发现理论和实验数据能够很好地符合 ,验证了α 结团模型对超重核研究的有效性 。

The status and development of the studies on reaction mechanism for synthesis of superheavy elements has been reviewed.

回顾了超重元素研究的现状和超重元素合成反应机制研究的发展,指出目前超重元素合成研究中存在的困难和对超重余核鉴别的一些设想。

This report introduces and analyzes the progress of the theoretical and experimental studies for the synthesis of superheavy element and nuclide in the world and our country.

本文在介绍和分析国际、国内在超重元素 (新核素 )合成实验研究与理论研究进展情况的基础上对我国今后如何从理论与实验的结合上开展超重元素 (核 )合成研究工作提出一些看法和建议 ,提供讨

Transuranium element Any of the chemical elements after uranium in the periodic table (with atomic numbers greater than 92).

超铀元素: 周期表中铀以后的任何化学元素(原子序数大于92)。

EFFICIENCY CALIBRATION OF TRANSURANIC NUCLIDE IN LUNG COUNTER

超铀元素肺部计数器的效率刻度技术

a radioactive transuranic element; discovered by bombarding americium with helium.

一种放射性超铀元素，在用氦轰击镅时发现。

a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei.

一种放射性超铀元素，在用氦核子轰击钚时发现。

a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles.

一种放射性超铀元素，用α粒子轰击锿而合成。

a radioactive transuranic metallic element produced by bombarding plutonium with neutrons.

一种放射性超铀元素，用中子轰击钚时产生。

a radioactive transuranic element; discovered by bombarding curium with alpha particles.

一种放射性超铀元素，在用α粒子轰击锔时发现。

a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known.

一种放射性超铀元素，用碳离子轰击锔而合成，已知有种同位素。

CALIBRATION OF IN VIVO MEASUREMENT SYSTEM FOR TRANSURANIC ELEMENTS AND RESULTS COMPARISON USING LLNL AND JAERI PHANTOMS

用两种人体胸腔模型对超铀元素活体测量系统刻度的结果及其比较

a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms.

一种放射性的超铀金属元素，在用氦原子轰击铀时发现。

a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium.

一种放射性超铀金属元素，在铀矿中有少量存在，是制造钚的副产品。

Uranium is a chemical element.

铀是一种化学元素。

Radium and uranium are radioactive elements.

镭和铀是放射性元素.

SPECIATION OF ELEMENTS(eg,URANIUM) AND MOBILITY OF URANIUM IN CALCAREOUS SOILS FROM WUJIANG RIVER CATCHMENTS

乌江流域石灰土中铀等元素形态与铀活性

Uranium is very valuable because it is a rare element.

铀很贵重，因为它是稀有元素。

a radioactive element of the actinide series; found in uranium ores.

锕类的放射性元素，见于铀矿中。

The heaviest naturally occurring element is uranium, which has92 protons.

自然存在的最重元素是铀，有92个质子。

I was struck by the fact that the activity of uranium and thorium compounds appears to be an atomic property of the element uranium and of the element thorium.

我突然意识到，铀化合物和针化合物的这些活性似乎是元素铀和元素钍的原子属性。