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ISSN - 17480221, Journal of Instrumentation, 2015, vol. 10, 9, p. -

Measurement of the KL nuclear interaction length in the NaI(Tl) calorimeter

Achasov M. N., Beloborodov K. I., Berdyugin A. V., Bogdanchikov A. G., Vasiljev A. V., Golubev V. B., Dimova T. V., Druzhinin V. P., Korol A. A., Koshuba S. V., Pakhtusova E. V., Serednyakov S. I., Silagadze Z. K., Usov Yu V.

© 2015 IOP Publishing Ltd and Sissa Medialab srl. In the study of the reaction e+e- KSKL at the VEPP-2M e+e- collider with the SND detector the nuclear interaction length of KL meson in NaI(Tl) has been measured. Its value is found to be 30-50 cm in the KL momentum range 0.11-0.48 GeV/c. The results are compared with the values used in the simulation programs GEANT4 and UNIMOD.