Tracks of 16.34 MeV/n ions in a stack of Makrofol-N plastic track detectors

Abstract

A stack of Makrofol-N (Bayer Co., Germany) plastic track detectors has been exposed to a well collimated beam of ions with initial energy of 16.34 MeV/n at UNILAC, Darmstadt (Germany). The effect of etching temperature on the etching characteristics of some solid state nuclear track detectors (SSNTDs) has been investigated for the registration of ion tracks. An empirical relation between the etching temperature and the various etch rates has been established from the experimental data. A correlation between track etch rate and energy loss rate has been established which provides us with an understanding of the mechanism of track formation. The maximum etched lengths of ions have been experimentally measured using Makrofol-N track detectors. The corrected track lengths have been compared with the theoretical energy range calculations and are found to conform to them reasonably well.

Conical Nanopore Membranes: Controlling the Nanopore Shape

“…Since we use about 2 mL of solution in each half cell, m =2.6 g. Hence, Equation (2) indicates that the temperature of the solution increases by around 9 °C during etching. Since the etch rate for polycarbonate is strongly dependent on temperature27 (e.g., an increase of temperature from 45 to 55 °C results in a threefold increase of the etching rate), a substantial increase in etch rate is, indeed, expected when 30 V is applied relative to the case when no transmembrane potential is applied during etching. Furthermore, these calculations assume that the heat generated is dissipated instantaneously throughout the entire volume of the half‐cell solution, but this is undoubtedly not true as the heat is generated within the pore.…”