Erratum to “New method of the precise measurement for the thickness and bulk etch rate of the solid-state track detector”

Temperature and pressure conditions for the appropriate performance of charge and mass resolutions in balloon-borne CR-39 track detector for the heavy cosmic rays

“…In recent studies, we experimentally demonstrated that the adjacent isotope (A = 55 and 56) of iron nuclei (Z = 26) are clearly resolved with mass resolution of <0.22 amu (atomic mass unit) [1,2] and individual nuclear charge of trans-iron nuclei (Z>30) is separated with the charge resolution of <0.21 cu (charge unit) [3]. These results were obtained using highly purified CR-39 detectors (BARYOTRAK) combined with high speed and precise measuring systems [4][5][6]. Precise measurements of ultra heavy nuclei and isotopes in galactic cosmic rays are planned using CR-39 detectors in a long-duration balloon experiment [7].…”

“…A part of the fundamental response curve of CR-39 detectors previously obtained at room temperature in the atmospheric pressure of about 100 kPa[4], indicating the relation of the sensitivity, S, versus Z/b. The dashed line shows the best fitting line around Z/b $ 26, corresponding to relativistic Fe ion.…”

“…Fundamental response for charge determination Fig. 2 shows a part of the relation between the sensitivity, S, in a logarithmic scale and Z/b previously obtained at room temperature in atmospheric pressure of about 100 kPa [4]. For the relativistic heavy ions (i.e.…”