Measurement of delayed fluorescence in plastic scintillator from 1 to 10 μs

On-Orbit Energy Calibration of the Calorimeter on the ISS-CREAM Instrument Using the Boronated Scintillator Detector

“…However, since the BSD is using a monolithic piece of scintillator, it captures the tail of a CR-induced shower and collects the associated energy deposition. The ISS-CREAM BSD was calibrated using electron and pion beams in 2012 and an analysis of the late PMT signals shows good agreement with predictions from detailed GEANT4-based Monte Carlo (MC) simulations [11]. It was also discovered that the late signal was dominated by delayed fluorescence light and that the ratio between the fluorescence light integrated over the late window and the prompt light from the shower integrated over the early window is a fixed value.…”

Time profile of fluorescence in organic scintillator out to 10 microseconds

“…The present study is motivated by the use of a boron-loaded Eljen EJ-254 plastic scintillator on the ISS-CREAM experiment [7], and is described in detail in [8] and [9]. The neutron content of showers initiated by leptons (e.g., electrons or positrons) differs from that of showers initiated by hadrons (e.g., protons or nuclei).…”