This article tests the feasibility of using the diameter-length (Le-D) technique to determine the bulk etch rate (V_b) in a CR-39 nuclear track detector. The detector was irradiated with alpha particles energies: 5.3, 4.7, 4.1 and 3.5 MeV, which were emitted from a ²⁴¹Am source. The detector was etched in a 6.25 N NaOH solution at 60 °C for periods of 1–10 h. The average V_b found by means of the (Le-D) method is approximately 0.76 ± 0.05 µm/h, which is consistent with the result found separately by the thickness-measurement method (i.e. 0.836 ± 0.06 µm/h). Moreover, the results show that the V_b of the CR-39 detector is independent of the alpha energies. This can pave the way for the use of the (Le-D) method as a reliable alternative method for measuring the bulk etch rate.

本文测试了在CR-39核径迹检测器中使用直径长度（Le-D）技术确定总体蚀刻速率（V _b）的可行性。用²⁴¹ Am光源发射的α粒子能量5.3、4.7、4.1和3.5 MeV照射检测器。将检测器在6.25 N NaOH溶液中于60°C蚀刻1–10 h。通过（Le-D）方法测得的平均V _b约为0.76±0.05 µm / h，这与通过厚度测量法单独测得的结果一致（即0.836±0.06 µm / h）。此外，结果表明V _bCR-39检测器的发射角与α能量无关。这可以为使用（Le-D）方法作为测量整体蚀刻速率的可靠替代方法铺平道路。