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delta rays
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     The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics and a single scattering model for the electron transport process. Result comparisons among this work and semi-empirical expression based delta ray theory of track structure, as well as other Monte Carlo calculations are made for 1, 3 MeV protons and several heavy ions.
     MONTE CARLO CALCULATION OF ENERGY DEPOSITION BY DELTA RAYS AROUND ION TRACKSZhangChunxiang;
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  相似匹配句对
     The Penetration of X-Rays
     X射线的穿透深度
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     that of M5 was X-rays;
     与M5有关的因素有X线;
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     THE FAULT DELTA
     断块型三角洲
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     (4)delta ;
     (4)三角洲;
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     Next, the effective single-scattering parameters are introduced to take away the forward delta-scattering induced by geometric rays.
     其次,新模式还引入了有效单次散射参量,消除了来自几何透射线的前向δ散射效应.
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  delta rays
The cross-sectional area of the lethality target in these extremely radiosensitive cells was determined from fluence-response curves and information on energy deposition by delta rays.
      
The target fragments, in turn, will be a source of delta rays that should contribute to biological damage locally in the tissue matrix.
      
Its delta rays are fewer but more energetic and gamma kill is more likely, which reduces the t/BE.
      
Because our model is based on the radial distribution of dose from delta rays, it automatically predicts thindown.
      


The radial dose distributions arou nd the path of a heavy ion have been calculatedby numerical integration method based on the delta theory of track structure proposed by Katz. The range-energy relationship of delta rays formulated by a logarithmic polynomial isused instead of linear or power function in the calculations. The results of these calculationsshow that it is in better agreement with the experimental data of the radial dose distributionaround the path of a heavy ion than that obtained using...

The radial dose distributions arou nd the path of a heavy ion have been calculatedby numerical integration method based on the delta theory of track structure proposed by Katz. The range-energy relationship of delta rays formulated by a logarithmic polynomial isused instead of linear or power function in the calculations. The results of these calculationsshow that it is in better agreement with the experimental data of the radial dose distributionaround the path of a heavy ion than that obtained using linear or power range-energy relationship.

基于径迹结构的δ射线理论,在电子能量20eV-20MeV范围内,本文用单一的对数多项式电子射程能量关系式代替分两段拟合的幂函数表达式,并依据重离子与受照射介质的核外电子相碰这时所产生的二次电子的径向通量公式,采用高斯数值积分法,计算了重离子径迹周围的径向剂量分布。用这种方法计算的结果与作者以前用幂函数公式计算的结果相比较,更接近于实验值。

The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics and a single scattering model for the electron transport process. Result comparisons among this work and semi-empirical expression based delta ray theory of track structure, as well as other Monte Carlo calculations are made for 1, 3 MeV protons and several heavy ions. The results of...

The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics and a single scattering model for the electron transport process. Result comparisons among this work and semi-empirical expression based delta ray theory of track structure, as well as other Monte Carlo calculations are made for 1, 3 MeV protons and several heavy ions. The results of the Monte Carlo simulations for energetic heavy ions are in agreement with experimental data and with results of different methods. The characteristic of this Monte Carlo calculation is a simulation of the delta rays theory of track structure.

MONTE CARLO CALCULATION OF ENERGY DEPOSITION BY DELTA RAYS AROUND ION TRACKSZhangChunxiang;LiuXiaowei;LuoDalingandLiMianfeng(...

The calculation of the cross-sections for the inactivation of enzymes and viruses has been made, assuming these to be 1-hit detectors. The calculation makes use of a power-law empirical formula for the radial distribution of doseabout the path of an energetic heavy ion. The calculation is made by assumingthat the probability of inactivatinga molecular target by irradiation with a givendose of delta rays is equal to the probability of inactivating it with the same doseof gamma-rays. The cross-section...

The calculation of the cross-sections for the inactivation of enzymes and viruses has been made, assuming these to be 1-hit detectors. The calculation makes use of a power-law empirical formula for the radial distribution of doseabout the path of an energetic heavy ion. The calculation is made by assumingthat the probability of inactivatinga molecular target by irradiation with a givendose of delta rays is equal to the probability of inactivating it with the same doseof gamma-rays. The cross-section is found by adjusting the assumed value of theD37 dose of gamma-rays until an optimal fit of the calculation to the measuredcross-sections is obtained. Taking all 72 cross-section measurements into account,the average ratio of experimental to calculated cross-sections is 0 .96±0 .11, whilethe average ratio of the experimental to the fitted value of the gamma-ray D37 doseis 1. 07 ±0. 18.

用幂函数电子射程-能量经验公式推导出的径向剂量分布公式计算病毒和酶的重离子失活截面,计算中把这些生物样品看作是一次击中探测器,并认为在相同剂量下δ射线和Y射线对生物样品有相同的失活几率,因此,失活几率的径向积分便可计算得出失活截面。用调整参数D-37使计算的截面尽可能与实验数据相符合的方法,对生物样品的72个截面进行了计算。截面的计算值和实验值的比值的平均值和标准误差为0.96±0.11,而D37与Dr37比值为1.07±0.18,得出了与实验较符合的结果。

 
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