TY JOUR TI Absolute Dose Measurement in Ion Therapy Beam Dosimetry by TLD KW TLD KW carbon ions KW LET KW quality assurance system JO ANRI AU Alekseev, A.G. AU Vasil'eva, A.G. AU Kiryuhin, O.V. AU Pikalov, V.A. PY 2025 IS 0 PB Scientific-Production Enterprise “Dosa”