俘獲截面 的英文怎麼說
中文拼音 [fúhuòjiémiàn]
俘獲截面
英文
capture cross section-
( 2000 ). the neutron irradiation is assumed to derive primarily by the reaction 13c ( a, n ) i60 with a minor contribution from the marginal burning of 22ne through the channel 22ne ( a n ) 23mg in the final, high temprature phase of each flash. and we considered the influence of the various parameters such as the initial core mass, the envelope mass, the mass - loss rate, the overlap factor and the delution factor etc., and we vary their value with the pulse number
本文採用分叉s -過程反應通道，以~ （ 13 ） c （ ， n ） ~ （ 16 ） o 、 ~ （ 22 ） ne （ ， n ） ~ （ 25 ） mg為雙脈沖中子源，用最新的中子俘獲截面，利用gallino和busso等人給出的agb星三殼層核合成模型，考慮到核心質量、挖掘程度、重疊因子、稀釋因子及星風質量損失率隨脈沖數的變化，詳細計算和研究了各個金屬豐度情況下的3m 。Adopting single pulse neutron exposure 22ne ( a, n ) 2dmg and the updated neutron cross section, making use of the core helium burning model of the single neutron exposure theory, we calculate the s - process nucleosynthesis in massive stars at different mettalicity and compare the results with the solar s - weak component
我們採用單脈沖中子源『 zne （ a ， n ） zsmg ，採用最新發表的中子俘獲截面，用中心氦燃燒模型計算了各金屬豐度情況下15m m叼0m 。的大質量星的s過程核合成，並將所得結果與太陽的s刁分量進行比較。On this condition, based on the experimental results gotten by the microwave absorption dielectric - spectrum measure technique, the photographic process at room temperature in agcl cubic microcrystals doped with k4fe ( cn ) 6 is simulated. through the optimization of simulating parameters, not only the cross - section and trap depth of the shallow electron trap induced by the dopant, but also the optimal doping amount is obtained
在此基礎上，以微波吸收介電譜檢測技術的實驗結果為依據，對摻有k _ 4fe （ cn ） _ 6的agcl立方體微晶在室溫下的曝光過程進行了模擬，通過調節模擬參數，不但計算出由摻雜劑引入的淺電子陷阱的俘獲截面和陷阱深度，而且得到了這種摻雜乳劑的最佳摻雜濃度。A reaction network program is created and used to analyze the astrophysical effects of the new reaction rates 18f ( p, ) 15o, 18f ( p, ) 19ne and 11c ( p, ) 12n. the new rate of 18f + p could produce form more production of 18f that expected by the rates of ref. [ coc00 ]
最近，我國原子能院就「 c （ p ，的『 「 n的直接俘獲的截面作了間接的測量[ liu03 ] ，我們根據其提供的直接部分的s因子更新了「 c （ p ，的『 zn的反應率[ liu03 ， shu03a ] ;並利用網路方程計算系統，討論了該反應率在巨質量貧金屬星中的影響。The results show that the contribution of direct capture is primary in the interested temperature range of astrophysics. toward the 12c ( n, y ) 13c reaction, our calculations are good agreement with a recent experiment at low energy. a obvious enhancement of the cross section of 12c ( n, y ) 13c first excited state has been found, and it supports that the first excited state 1 / 2 + of 13c is a neutron halo state which has been found experimentally by our department group
對于第一個核反應，我們計算了直接俘獲過程以及兩個共振態的俘獲截面和總截面，我們的計算結果顯示，在天體感興趣的溫度范圍內，直接俘獲過程對總截面的貢獻是主要的；對于第二個反應，我們的計算結果與已有的實驗結果符合的較好，其中~ （ 12 ） c （ n ， ） ~ （ 13 ） c的第一激發態計算結果顯示出截面有明顯增大，這從理論上支持了我所關于~ （ 13 ） c第一激發態具暈結構的實驗發現，這是國際上第一次在激發態中發現暈結構。Measurement and monte - carlo correction of neutron radiative capture cross section for 75as
中子輻射俘獲截面的實驗測量及蒙特卡羅修正We give a mathematical proof for the model - approximately independence of anc coefficient. combining a concrete nuclear reaction, we check up the model - approximately independence of anc coefficient with numeric calculation. under the el transition condition, a expressions with anc coefficient to compute the cross section of radiative capture reaction has been given in this thesis
我們對anc系數的近似模型無關性給出了一個數學形式理論證明，並結合具體的核反應，利用數值計算驗證了anc系數的近似模型無關性；在e1躍遷情況下，我們給出了一個用anc系數計算輻射俘獲反應截面的計算公式。The values of these cross sections affect the path to synthesize the a > 12 elements
這些輻射俘獲截面的大小，直接影響到a > 12以上元素合成的途徑。分享友人