UV laser induced desorption of CsI and RbI ion clusters

UV laser‐induced desorption mechanism analyzed through two‐layer alkali halide samples

“…This behavior is observed for both the positive and negative series, in agreement with previously reported results for CsI and RbI samples. 13,18 The measured values of the slope parameter k m (as well as k D k m M) are presented in Table 2, corresponding to the average of several laser intensities, ranging from I D 0.89 to 4.61 GW/cm 2 .…”

“…18 To guarantee reproducibility, three different spots were examined on two distinct samples; for each spot, the mass spectrum was acquired with an average of 10 laser shots of I D 1.9 and 0.89 GW/cm 2 for the RbI C KCl and CsI C KBr targets, respectively. In the case of the 'nonmixed' samples, the positive and negative spectra were acquired in a virgin site with a single laser shot, creating a hole throughout both salts and removing the material once.…”

“…In the current work, time of flight-mass spectrometry (TOF-MS) 18 is pursued to study the ions generated by laser ablation/vaporization of several alkali halide salts: XY (where X D Cs, Rb, or K and Y D I, Br, or Cl). A series of Ł Correspondence to: E. F. da Silveira, Physics Department, Pontifícia Universidade Católica, Rua Marques de São Vicente 225, 22452-900 Rio de Janeiro, Brazil.…”

Penta(pyrenyl)[60]fullerenes: Pyrene–Pyrene and [60]Fullerene–Pyrene Interactions in the Crystal and in Solution

“…We have previously reported a thermal ablation model to describe the dynamics of the cesium ions created by UV laser in the first stages of their temporal evolution12 by two mechanisms13: one representing the energy absorption/deposition and another in which it is determined the probability of occurrence of atomic species recombination during the expansion of the high density and highly ionized cloud. In particular, alkali halide cluster ions have been observed previously14–18 and its formation is still under investigation.…”

“…In the current work, time of flight‐mass spectrometry (TOF‐MS)18 is pursued to study the ions generated by laser ablation/vaporization of several alkali halide salts: XY (where X = Cs, Rb, or K and Y = I, Br, or Cl). A series of target combinations of two salts were prepared and ablated, producing cluster ions whose yield analysis is expected to contribute to the understanding of the laser desorption mechanism.…”