Dissociative recombination of CH$^+$ molecular ion induced by very low energy electrons

Dissociative recombination measurements of NH$^+$ using an ion storage ring

We have investigated dissociative recombination (DR) of NH$^+$ with electrons using a merged beams configuration at the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present our measured absolute merged beams recombination rate coefficient for collision energies from 0 to 12 eV. From these data we have extracted a cross section which we have transformed to a plasma rate coefficient for the collisional plasma temperature range from $T_{\rm pl} = 10$ to $18000$ K. We show that the NH$^+$ DR rate coefficient data in current astrochem…

Dissociative recombination measurements of HCl+ using an ion storage ring

We have measured dissociative recombination of HCl+ with electrons using a merged beams configuration at the heavy-ion storage ring TSR located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present the measured absolute merged beams recombination rate coefficient for collision energies from 0 to 4.5 eV. We have also developed a new method for deriving the cross section from the measurements. Our approach does not suffer from approximations made by previously used methods. The cross section was transformed to a plasma rate coefficient for the electron temperature ra…

N$_2$H$^+$的解离复合：一项重新审视的研究

Dissociative recombination of N$_2$H$^+$: A revisited study

该研究结合1D MQDT模型与基于简正模近似、R矩阵理论及MQDT的3D方法，重新审视N$_2$H$^+$解离复合，使极低能区结果与储存环实验良好吻合。

NS+与慢电子碰撞的离解复合

Dissociative recombination of NS+ in collisions with slow electrons

本研究计算了10-1000 K下NS+与低能电子碰撞的离解复合截面及速率系数，发现其速率比NO+慢，10 K时仅为现有数据库估计值的1/2，且多通道量子亏损理论的结果更可靠。

CO$^{+}$的解离复合与振动激发：模型计算及与实验的比较

Dissociative recombination, and vibrational excitation of CO$^{+}$: model calculations and comparison with experiment

本文利用最新CO分子结构数据和多通道量子亏损理论计算CO$^+$解离复合截面，并与合并束及储存环实验比较，验证了动力学方法的可靠性。

N$_2$H$^+$的解离复合：同位素效应

Dissociative recombination of N$_2$H$^+$: Isotopic effects

本文通过简正模近似与多通道量子缺陷理论计算了N$_2$H$^+$八种同位素体的解离复合截面与速率系数，发现同位素差异最高达30%，并据此证明解离复合并非星际分子云中N$_2$H$^+$异常氮同位素比率的原因。

低能电子与NeH+的离解复合：包含非绝热耦合的多通道量子亏损理论

Dissociative recombination of NeH+ with low-energy electrons: Multichannel quantum defect theory including non-adiabatic couplings

本研究采用纳入非绝热耦合的多通道量子亏损理论，研究低能电子与NeH+的离解复合过程，填补了4.5 eV以下的理论数据空白，结果与实验吻合良好。

H2+和HD+的电子碰撞振转跃迁与解离复合：速率系数及天体物理学意义

Electron impact ro-vibrational transitions and dissociative recombination of H2+ and HD+: Rate coefficients and astrophysical implications

本文利用多通道量子亏损理论计算了H2+和HD+的电子碰撞振转跃迁及解离复合速率系数，发现新数据显著改变无金属气体天体化学模型中的分子丰度预测。

Experimental determination of the dissociative recombination rate coefficient for rotationally-cold CH$^{+}$ and its implications for the diffuse cloud chemistry

Observations of CH$^+$ are used to trace the physical properties of diffuse clouds, but this requires an accurate understanding of the underlying CH$^+$ chemistry. Until this work, the most uncertain reaction in that chemistry was dissociative recombination (DR) of CH$^+$. Using an electron-ion merged-beams experiment at the Cryogenic Storage Ring, we have determined the DR rate coefficient of the CH$^+$ electronic, vibrational, and rotational ground state applicable for different diffuse cloud conditions. Our results reduce the previously unrecognized order-of-magnitude uncertainty in the CH$…

R-矩阵方法中NS分子束缚态与共振态的研究

Study of bound and resonant states of NS molecule in the R-matrix approach

本文利用从头算R-矩阵方法研究NS分子的束缚态与共振态，计算了三种对称性下的自电离宽度和解离势能曲线，为解离复合及转动振动激发等碰撞过程模型提供关键输入。

Electron-induced excitation, recombination and dissociation of molecular ions initiating the formation of complex organic molecules

We review the study of dissociative recombination and ro-vibrational excitation of diatomic and small polyatomic molecular ions initiating complex organic molecules formation. In particular, we show how Multichannel Quantum Defect Theory (MQDT) and R-matrix methods are used to compute cross sections and rate coefficients for cations in well defined ro-vibrational levels of the ground electronic state, from sub-meV up to few eV collision energies. The most recent MQDT results are compared with either other theoretical data, or with measured data obtained in storage-ring experiments.

转动冷OH$^+$的离解复合及其对弥散云宇宙射线电离率的启示

Dissociative Recombination of Rotationally Cold OH$^+$ and Its Implications for the Cosmic Ray Ionization Rate in Diffuse Clouds

本文在低温存储环上测量转动冷基态OH$^+$的离解复合速率，发现其显著高于既有实验与理论值，并据此将弥散云宇宙射线电离率上调至$(6.6\pm1.0)\times10^{-16}\\,\mathrm{s}^{-1}$，表明星际云屏蔽更强。

Electron driven reactive processes involving H$^+_2$ and HD$^+$ molecular cations in the Early Universe

We describe the major low-energy electron-impact processes involving H$^+_2$ and HD$^+$, relevant for the astrochemistry of the early Universe: Dissociative recombination, elastic, inelastic and superelastic scattering. We report cross sections and Maxwellian rate coefficients of both rotational and vibrational transitions, and outline several important features, like isotopic, rotational and resonant effects.