Experimental determination of the structure ofH3+

Energy loss of swiftH2+andH3+Shubeita1, Grande2, Dias3 et al. 2011Phys. Rev. B132130View full textAdd to dashboardCite

“…24 The initial intermolecular distance distribution for the H molecule we choose an initial configuration corresponding to an equilateral triangle of side 1Å. 25 The molecular ion impinges with a random orientation on the target, and after averaging the results of 10 5 histories we find the energy of both correlated and isolated fragments of the molecule at the exit of the target. By comparing both results we are able to calculate the stopping ratios R 2 and R 3 .…”

Energy loss of swift H 3 + -molecule ions in carbon foils

“…Atomic units ( 1 ) will be used throughout this paper. The protons in the H + 3 -molecule ion form an equilateral triangle [21], with internuclear distance r, as the inset in fig. 1 shows.…”

“…Taking the initial time, t = 0, when the molecule enters the foil with the mean equilibrium internuclear distance r 0 = r(t = 0) = 1.89 au [21], fig. 1 shows how the internuclear distance between each couple of protons in the H + 3 molecule changes as a function of time, r(t), for two velocities, v = 1 au and v = 2 au, which cover the range of the experimental situation to be discussed later on; the case of Coulomb repulsion without screening is also depicted as a dotted line.…”

Multiple H+3 fragment production in single collision of fast H+ n clusters with He atoms

“…Moreover, the relative velocity of the projectile and the target atom is around or greater than the velocity of the electrons in the cluster. Then, the time for a typical collision with a target atom is short enough, compared to the typical time of the motion of the protons in the cluster, so that during the collision the protons can be considered to be stationary in the projectile frame [7]. Thus, processes such as ionization of the incident cluster followed by dissociation of the resulting unstable multicharged cluster can be involved.…”

“…First of these intermediate masses, the protonated hydrogen, H+3, is the simplest stable polyatomic system and then represents fundamental interest for experimental and theoretical studies [5]. Detailed ab-initio calculations had predicted the energy spectrum and the equilateral-triangular structure [6] which has been confirmed by foilinduced dissociation experiments [7]. The first astro-…”