查询词典 nuclide

Radioisotope means the nuclide in a certain element with radioactive decay, which has the same ordinal number of atoms but different mass.

放射性同位素，是指某种发生放射性衰变的元素中具有相同原子序数但质量不同的核素。

Results In 108 splenic preservation cases, who were operated or non-operated, the value of 1gM and CD3 was significantly higher than that in the splenectomy group (P.01); CD8 and CD4 were significantly higher that those of splenectomy group (P.05); the percentage of pockmark red cells was lower than that splenectomy group (P.01) CT, BUS and 99mTc nuclide scan confirmed that the structure of the preserved spleen had recovered to normal, and the ruptured surface of the spleen had completely healed I mouth after operation.

结果 108例保脾患者经手术或非手术治疗后，其IgM，CD3远高于切脾组，差异有显著性(P.01)；CD8和CD4显著高于切脾组(P.05)，痘痕红细胞百分率低于切脾组(P.01)。CT，B超，99锝核素显像等证实保脾组1个月后脾结构恢复正常，裂口创面完全愈合。

The exposure dose from various nuclide through eachpathway to the population surrounding the nuclear power plant whichwas assumed to be in an accident was calculated by statistic calculationmethod using practical meteorological data.The relationship betweenradioactive release and exposure dose was obtaine,dwhich is independentof the accidential process and the meteorological condition.

本文借助于核电站假想事故条件下的放射性释放量，按不同的核素组，分组计算了其经各种照射途径对周围居民造成的剂量；并考虑了气象资料的统计数据，使得因天气条件两低估剂量的可能不超过5%；从而得到了与事故过程和天气条件无关的释放量和照射剂量间的关系。

The structure and the simulation results about the cooling, bunching ,extraction and skimming of the RFQ cooler and buncher RFQ1L,which is an important part of the being-built super-heavy nuclide research spectrometer,have been introduced.

介绍了超重核研究谱仪中RFQ冷却聚束器RFQ1L的结构和运用SIMION程序对离子的冷却、聚束、引出和撇气过程的模拟情况。

Super-heavy nuclide ; RFQ cooler and buncher ; buffer gas ; pressure rise rate

超重核；冷却聚束器；缓冲气体；压升率

Geothermochronology based on mineral closure temperatures and geochronological methods such as U-Pb, Sm-Nd, Rb-Sr, Lu-Hf, Re-Os, 40Ar/39Ar, FT,/He, TIMS U-series, cosmogenetic nuclide (including 14C, etc.) and 3H/3He for young groundwater dating is reviewed in this paper.

简要介绍了基于矿物封闭温度的地质热年代学，并对多种地质年代学方法，包括U-Pb法、Sm-Nd法、Rb-Sr法、Lu-Hf法、Re-Os法、40Ar/39Ar法、裂变径迹测年、/He法、TIMS铀系法、宇宙成因核素定年（包括14C法等）和年轻地下水测年（如3H/3He法等）进行了综合评述。

Accelerator mass spectrometry has ultra-high sensitivity and can be used to detect extremely low impurity contents in samples. 10Be is a cosmogenic nuclide. As a tracker, it has been widely applied to earth, environmental and cosmographic sciences.

加速器质谱计具有很高的灵敏度，能测量样品中含量极微的杂质同位素。10Be是一种宇宙成因核，在地学、环境科学和宇宙学等领域有广泛的应用，它为纯β衰变核，端点能量低且半衰期很长。

The Apatite fission track analysis, the deposition erosion process analysis and the cosmogenic nuclide analysis are introduced as the three new advancing methods on the recovery of the thickness of eroded strata in basin in this paper.

主要介绍了磷灰石裂变径迹分析法、沉积波动过程分析法和宇宙成因核素分析法等3 种恢复和计算地层剥蚀量的新方法。

Ca is widely abundant in nature and its rodioisotope 41 Ca is a cosmogenic nuclide with a half\|life of 10 5 years. However, the 41 Ca/ 40 Ca ratio in natural samples is very low and can only be measure d by accelerator mass spectrometry. The application of 41 Ca is ve ry i mportant not only in the life science but also in geological dating, global envi ronment change studies and astrophysics.

1 引言Ca在自然界中广泛存在，它不仅是人体中含量最丰富的元素之一[1] ，也是众多其他物质的组成部分。41Ca(半衰期为 1.0 3× 10 5a)属于Ca的放射性同位素中的一种，其衰变方式为轨道电子俘获，只发射3.3keV的X射线，天然样品中41Ca 40 Ca的值很小。

Be formation cross section ; accelerdator mass spectrometry ; cosmogenic nuclide.

~（10）Be形成截面；加速器质谱计；宇宙成因核

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。