Propagation and secondary production of low-energy antiprotons in the atmosphere.
Propagation and secondary production of low-energy antiprotons in the atmosphere.
复制标题
低能反质子在大气中的传播和二次产生。
DOI：
10.1103/physrevd.33.651
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Moats
中科院分区：
文献类型：
--
作者：
Bowen;Moats
目前的理论认为，观测到的反质子成分严格归因于质子与星际介质或大气的高能非弹性碰撞中的二次生产，显然无法解释在山上和气球高度测量到的相对较高的p垂直强度。因此，在探索这些过剩p的更多奇异来源之前，需要更仔细地计算理论上的次级强度谱。一维扩散方程被用来计算仅由于大气中的二次生产而产生的p的预期垂直强度；也包括了任何假设的初级p谱。该算法考虑了核子-核碰撞中的非弹性和电荷交换两个可调参数。为了获得它们的值的独立估计，计算了大气中的质子垂直强度，调整参数直到曲线与实验质子数据相匹配，然后假设这些值在反核-核碰撞中是相同的。
Current theories, in which the observed antiproton component is attributed strictly to secondary production in high energy inelastic collisions of protons with the interstellar medium or the atmosphere, apparently fail to explain the relatively high p vertical intensities measured at mountain and balloon altitudes. Therefore, a more careful calculation of the theoretical secondary intensity spectra is required before more exotic sources for these excess p's can be explored. A one dimensional diffusion equation is used to calculate the expected vertical intensity of p's due only to secondary production in the atmosphere; any assumed primary p spectrum is also included. Two adjustable parameters, the inelasticity and charge exchange in nucleon-nucleus collisions, were included in the algorithm. In order to obtain an independent estimate of their values the proton vertical intensities in the atmosphere were calculated, adjusting the parameters until the curves fit the experimental proton data, and then assumed that these values were identical in antinucleon-nucleus collisions.