Sub-Kelvin Stereodynamics of theNe(P32)+N

General treatment for stereo-dynamics of state-to-state chemi-ionization reactions

“…Obtained results suggest also how to extend the methodology to chemi-ionization reactions involving molecules 15 , which are of great interest in several fields, including the balance of phenomena occurring in interstellar environments and planetary atmospheres. In particular, the ability of our method to describe the stereodynamics of chemi-ionization involving molecules in a state-to-state condition, should allow a correct modeling of interesting experimental data obtained by our [4] and other laboratories 12,15,47 . Finally, electron-molecule impacts promote reactions that can be considered reverse respect to autoionization processes.…”

“…The same type of analysis is in progress for reactions promoted by Ne * -Ar, Xe collisions. The possibility to obtain state-to-state cross sections is of great interest for the investigation of quantum effects in the coherent control of collision processes, promoting Penning and associative ionization, from ultra-cold up to thermal reactive collisions 14,15 .…”

“…It involves both in entrance and exit channels an isotropic term, that includes non-covalent components of the interaction, and an anisotropic contribution whose "chemical" origin and role is discussed in the text (see Eqs. [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Moreover, the imaginary part formulation is fully discussed in the previous section (see, in particular, Eqs.…”

“…Chemi-ionizations investigated in this paper are barrierless processes that play an important role in chemistry and physics of plasmas [10][11][12] , planetary atmospheres, interstellar environments and even in basic phenomena of biology 13 . Such reactions take place also under cold and ultra-cold temperature conditions and, from a point of view of basic sciences, their detailed investigation is crucial to address the coherent control of reactivity events at low collision energy and to utilize the quantum nature of matter 14,15 . These reactions are very important in applied sciences, as for the development of mass spectrometry techniques exploiting the soft ionization of neutral species 16 and surfaces 17,18 .…”

Direct observation of a Feshbach resonance by coincidence detection of ions and electrons in Penning ionization collisions

“…Only recently Gao et al 3 reported a fully resolved detection of rotational excitation in bimolecular collisions. The latest advances in molecular beams studies now enable performing precise experiments reaching collision energies as low as 10 mK, and the observation of different quantum phenomena such as scattering resonances 4 , the quantum isotope effect 5 , stereodynamics of chemi-ionization reaction 6 , and the prominent effect of the internal molecular structure on dynamics at low collision energies 7,8 .…”