The radiative lifetimes of low lying 4f 66s6p and 4f 55d6s 2 levels for Sm atom were determined by means of time resolved laser induced fluorescence using one step excitation.
利用时间分辨激光诱导荧光 (L IF)方法 ,采用一步激发 ,测量钐 (Sm)原子 4f6 6s6p和4f55 d6s2系列的自然辐射寿命 ,并给出能级 1 82 0 9cm- 15G03的寿命值 。
BACKGROUND & AIM:To study the effect of smoking in different areas with different environmental mutagens including natural radiation.
背景与目的:研究包括天然辐射等不同环境诱变因素地区居民的吸烟效应。
Experimental Study of Natural Radiation Lifetimes and Landé Factors for High-excited 5p7p Levels in Sn I;
锡原子高激发态5p7p能级的自然辐射寿命和朗德因子
Natural Radiative Lifetimes and Landé Factors of Even-parity Levels Along J=1 Rydberg Series in Sn I
锡原子偶宇称J＝1里德堡系列能级的自然辐射寿命和朗德因子
Test method for lifetime of infrared heater
GB/T7287.11-1987红外辐射加热器寿命试验方法
Calculation of Oscillator Strengths and Lifetimes on the Transitions of High Rydbery States of Atom Li
锂原子高里德伯态跃迁的振子强度和辐射寿命
Applications of Photon Closed-orbit Theory to Oscillations in the Spontaneous or Fluorescence Emission Rate of Atoms or Molecules in a Dielectric Slab System;
光子闭合轨道理论在介质板体系中原子自发辐射和分子荧光寿命问题上的应用
THE ENERGY LEVELS, RADIATIVE TRANSITION PROBABILITIES AND LEVEL LIFETIME FOR Na-LIKE Br TO Rb
溴到铷的类钠离子能级辐射跃迂几率和能级寿命
Radiation Trapping Effect and Measurement of the Rb(5P_(1/2)) Level Effective Radiative Times in the Vapor
Rb蒸气中的辐射陷获效应和5P_(1/2)能级有效寿命的测量
The estimating method of atmospheric aging age on polymer matrix composites
聚合物基复合材料自然老化寿命预测方法
microsec life radioisotope
微秒寿命放射性同位素
short-lived radioisotope
短寿命放射性同位素
millisecond life radioisotope
毫秒寿命放射性同位素
Electromagnetic radiation produced by natural phenomena such as lightning.
由自然现象,如闪电等产生的电磁辐射等。
The Pre-Research on the Radial Sandy Ridges in Jiangsu Costal Zone Application for the World Nature Heritage
江苏沿海辐射沙洲申报世界自然遗产预研究
The natural lifetime for such beings is short, compared to the travel time.
这样的生命具有的自然寿命与太空旅行的时间相比是短暂的。
High-tech engineering, electronic computers, even radioactivity are new weapons in a continuing battle to preserve and extend human life.
高科技工程、电子计算机，甚至辐射技术，在这场维持并延长人类寿命的持续战斗中成为新兴武器。
The Effect of Heat Pasteurization and Radurization Combination processing on the Shelf Life and Quality of Ham
加热巴氏杀菌和辐射选择性杀菌联合加工对圆腿货架寿命和产品品质的影响 初报
Effect of ~(60)Co-γ Ray Radiation on the Germination Rate and Growth of Tagetes erecta
~(60)Co-γ射线辐射万寿菊对发芽率及生长的影响
But 20h century medicine did little to increase the natural life - span of healthy humans.
但是，20世纪的医学在延长健康人的自然寿命方面没有什么进展。