Wolf Andreas, Kreckel H, Lammich L, Strasser D, Mikosch J, Glosík J, Plasil R, Altevogt S, Andrianarijaona V, Buhr H, Hoffmann J, Lestinsky M, Nevo I, Novotny S, Orlov D A, Pedersen H B, Terekhov A S, Toker J, Wester R, Gerlich D, Schwalm D, Zajfman D
Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany.
Philos Trans A Math Phys Eng Sci. 2006 Nov 15;364(1848):2981-96; discussion 2996-7. doi: 10.1098/rsta.2006.1881.
Measurements on the energetic structure of the dissociative recombination rate coefficient in the millielectronvolt range are described for H3+ ions produced in the lowest rotational levels by collisional cooling and stored as a fast beam in the magnetic storage ring TSR (Test Storage Ring). The observed resonant structure is consistent with that found previously at the storage ring facility CRYRING in Stockholm, Sweden; theoretical predictions yield good agreement on the overall size of the rate coefficient, but do not reproduce the detailed structure. First studies on the nuclear spin symmetry influencing the lowest level populations show a small effect different from the theoretical predictions. Heating processes in the residual gas and by collisions with energetic electrons, as well as cooling owing to interaction with cold electrons, were observed in long-time storage experiments, using the low-energy dissociative recombination rate coefficient as a probe, and their consistency with the recent cold H3+ measurements is discussed.
描述了对通过碰撞冷却产生于最低转动能级并作为快束存储在磁存储环TSR（测试存储环）中的H₃⁺离子，在毫电子伏特范围内离解复合速率系数的能量结构的测量。观察到的共振结构与先前在瑞典斯德哥尔摩的存储环设施CRYRING中发现的一致；理论预测在速率系数的整体大小上取得了良好的一致性，但没有再现详细结构。关于核自旋对称性对最低能级布居影响的初步研究显示出与理论预测不同的微小效应。在长时间存储实验中，以低能离解复合速率系数为探针，观察到了残余气体中的加热过程以及与高能电子碰撞产生的加热过程，以及与冷电子相互作用导致的冷却过程，并讨论了它们与最近对冷H₃⁺测量结果的一致性。
