共查询到20条相似文献,搜索用时 93 毫秒
1.
The collision-induced dissociation of 10 keV H 2 + ions incident on H2 has been studied in this paper. Total cross sections and angle distributions for the H+-H, H+-H+ and H-H fragmentations are given. Distributions over both angle and velocity have been measured for the H-H+ and H-H fragmentation. 相似文献
2.
应用改进的排列通道量子力学方法(ACQM)对H+2离子与H原子的相互作用进行了研究.研究结果表明,H+2离子与H原子相互作用能够形成稳定的正三角形构型的H+3离子,从而为实验上制备H+3离子找到了一种新的方法. 相似文献
3.
4.
报道了H+5的实验结果.分析讨论了H+5的形成和分解途径.根据理论分析,以稳定的H+3为核心与一个或多个氢分子结合可能形成稳定的H+n氢团簇离子.另一方面,在高频离子源中, 有发生H+3与H2反应的条件.实验中,从高频离子源引出的离子束被静电加速器加速,然后用90°磁分析器选择质量数为5的离子,再将这些离子偏转20°,最后在20°方向测量它们的能谱.从能谱发现,在高频离子源中可能通过H+3与H2的离子-分子反应形成了H+5团簇离子;并且在H+5的分解产物中还发现可能存在H3和H4等中性团簇产物. 相似文献
5.
6.
用LCAC—SW法计算H+H2(0)→H2+H一维共线反应几率 总被引:1,自引:0,他引:1
用排列通道线性组合散射波方法计算了一维共线反应H+H2(0)→H2+JH的反应几率。在采用较小基组的情况下,得到了与精确量子计算数值相吻合的结果。 相似文献
7.
用Penning型离子阱经碰撞反应H2^++H2→H4^+产生稳定的H4^+,主要的反应产物是H3^+,但十分明显地观测到H4^+信号。H4^+在阱中稳定存在时间长达0.1s量级,远比Kirchner等人测量的10^-6s量级长,最后讨论了生成H4^+的反应过程机制。 相似文献
8.
9.
利用高斯分布拟合HT-6M托卡马克Hα线型,得出了由反射进入等离子体中的氢原子、氢分子离解后产生的氢原子,以及电荷交换产生的氢原子辐射Hα谱线的份额,由Doppler频移和展宽分别得出它们的入射速度和离子温度.在简化模型下讨论了氢原子的输运行为,得出了氢原子的密度分布和体发射系数,以及入射速度大小对粒子约束时间的影响,并与实验数据进行比较.由中性氢原子能量分布得出发生在边界的分子过程是氢分子的离解激发和电离离解
关键词: 相似文献
10.
11.
用含时波包(TDWP)理论计算了具有两个不同产物道的反应HD+H→H+DH,D+H2的初态确定的反应几率及生咸物的分支比。在利用分解算符法进行波包传播的过程中,采取了分立变量表象(DVR)及分立交量-有限基表象(DVR—FBR)变换,这一方法降低了传播过程中需保存大变换矩阵的要求。通过应用能量投影法,可从单一波包中抽出许多能量确定的动力学信息。为了避免因所选取的格点范围有限而引起的波函数在边界点附近的反射,传播过程中还采用了光学势以吸收反射波函。 相似文献
12.
13.
14.
Using a volumetric technique, phase transitions in the H2O–H2 system were investigated in the vicinity of two points of an invariant equilibrium, L+I h+sII and L+sII+C 1, located at 1.07 kbar and?10 °C and at 3.6 kbar and 1 °C, respectively. Liquid water (L), low-pressure hexagonal ice (I h) and high-pressure cubic (sII) and rhombohedral (C 1) clathrate hydrates were in equilibrium with gaseous hydrogen taken in excess. 相似文献
15.
《Journal of Quantitative Spectroscopy & Radiative Transfer》1986,36(3):233-237
Red shifts are reported for the Hα and Hβ lines at electron densities of 1016–1017 cm-3. The peak shift of the Hα line agrees with the ELC shift. For the Hβ line, the dip shift exceeds the ELC shift systematically. The Hβ dip shift is proportional to Ne/T. 相似文献
16.
17.
18.
利用量子力学耦合通道扭曲波近似法(CCDWA)和三种势能面计算了H+H2碰撞的反应几率,结果发现在相同的势能面下利用CCDWA方法计算的反应几率和公认较好的计算结果符合很好,不同势能面共线势垒高度的差别将引起反应几率的不同. 相似文献
19.
20.
V. V. Pogosov A. L. Rakhmanov K. I. Kugel’ 《Journal of Experimental and Theoretical Physics》2000,91(3):588-596
A variational method is proposed to find the magnetic field dependence of the magnetization of type-II superconductors in the mixed state by a self-consistent technique. This model allows for suppression of the order parameter to zero at the centers of Abrikosov vortices and also for the magnetic field dependence of the order parameter. The results can be applied to the entire range of fields H c 1 ≤ H ≤ H c 2 for any values of the Ginzburg-Landau parameter $\kappa > 1/\sqrt 2$ . It is shown that in weak fields where κ ? 1 the behavior of the magnetization can be described exactly in the London approximation provided that the correct value of H c 1 is used. Near the second critical field this dependence shows good agreement with the well-known Abrikosov result. It is also shown that using the concept of isolated vortices and applying the principle of superposition of the fields and currents generated by these vortices to calculate the magnetization gives inaccurate quantitative results even in fairly weak fields. By going beyond these concepts, it was possible to allow more accurately for the influence of the vortex cores on the magnetization behavior in the intermediate range of fields H c 1 ?H ? H c 2 and to identify the range of validity of various approximations used widely in the literature. 相似文献