# High-light-yield calcium iodide (CaI2) scintillator for astroparticle physics

## TL;DR

This paper presents the development and characterization of a high-light-yield calcium iodide (CaI2) scintillator, demonstrating its superior light emission and pulse shape discrimination capabilities for astroparticle physics experiments.

## Contribution

The study introduces a calcium iodide scintillator with significantly higher light yield and effective pulse shape discrimination, suitable for astroparticle physics applications.

## Key findings

- CaI2 has 2.7 times the light emission of NaI(Tl)
- CaI2 exhibits excellent pulse shape discrimination between alpha and gamma sources
- Emission wavelength aligns well with photomultiplier sensitivity

## Abstract

A high light yield calcium iodide (CaI2) scintillator is being developed for an astroparticle physics experiments. This paper reports scintillation performance of calcium iodide (CaI2) crystal. Large light emission of 2.7 times that of NaI(Tl) and an emission wavelength in good agreement with the sensitive wavelength of the photomultiplier were obtained. A study of pulse shape discrimination using alpha and gamma sources was also performed. We confirmed that CaI2 has excellent pulse shape discrimination potential with a quick analysis.