Stopping Cross Sections of Li⁺ Ions with Energies from 30 to 100 keV in Various Target Materials

Abstract

The electronic stopping cross sections for lithium ions in carbon, aluminium, titan, nickel, and copper are reported. The dependence on energy in the interval from 30 to 100 keV and on the atomic number of the target atoms are investigated. By using some data from other authors a characteristic dependence of the electronic stopping cross section on the atomic number of the target atoms is found.Es werden elektronische Bremsquerschnitte fur Lithiumionen in Kohlenstoff, Aluminium, Titan, Nickel und Kupfer mitgeteilt. Ihre Abhangigkeit von der Energie im Bereich 30 bis 100 keV und von der Ordnungszahl der Targetatome wurde untersucht. Unter Verwendung einiger Daten anderer Autoren wurde eine charakteristische Abhiingigkeit des elektronischen Bremsquerschnittes von der Ordnungszahl der Targetatome gefunden.

Electronic stopping cross sections of elements and compounds for swift Li ions

“…We were not able to see any significance for a stopping law of the formS=-a.v q,orS=-k.E pwithq+l or p=t=0.5 which was concluded by other authors from conventional energy loss experiments with 0.4 < p < 0.8 [7][8][9]. 3.…”

“…In the first column the substances are listed, the second gives the densities and their references, and the third contains the stopping cross sections at Bohr's velocity and the statistical errors. Four of these values can be compared with the results of other authors [8,9]. Since these authors have measured at lower energies we have taken their results corresponding to the highest measured energy (because Dilute solution of boric acid (smaller than 1 ~ corrected for H3BO 3 content, temperature stabilized at 23 ~ here the contribution of nuclear stopping is small) and calculated our stopping cross sections for this energy, Eq.(4).…”

Does the Result of a Stopping Power Measurement Depend on the Method Used?

“…If one compares the results of the Cologne group [27][28][29][30] for Li projectiles at the Bohr velocity v 0 in B, Al, Ti, and Cu with low energy transmission measurements by Ormrod et al [31], Mac Donald et al [32], Bernhard et al [33], and Santry and Werner [34], one finds satisfactory agreement.…”

Energy–Angle Distribution of 14N and 20Ne Ions after Passage through Thin Carbon Foils

“…The present measurements were obtained with an apparatus which has been described elsewhere [7]. N and Ne ions with energies ranging from 19 to G3 keV were used to bombard carbon foils with thicknesses from 1.4 to 5.8 pgcm-2.…”