ISAI: Investigating Solar Axion by Iron-57

TL;DR

ISAI is a proposed experiment aiming to detect solar axions via 14.4 keV X-ray emissions from Iron-57, utilizing advanced silicon detectors in a low-background setup to explore dark matter and solve the strong CP problem.

Contribution

This paper introduces the ISAI experiment, a novel tabletop setup using XRPIX detectors to search for solar axions through nuclear transition X-ray emissions, advancing experimental approaches in axion detection.

Findings

Design and scientific objectives outlined

Latest status and technical details presented

Potential to confirm solar axion hypothesis

Abstract

The existence of the axion is a unique solution for the strong CP problem, and the axion is one of the most promising candidates of the dark matter. Investigating Solar Axion by Iron-57 (ISAI) is being prepared as a complemented table-top experiment to confirm the solar axion scenario. Probing an X-ray emission from the nuclear transitions associated with the axion-nucleon coupling is a leading approach. ISAI searches for the monochromatic 14.4 keV X-ray from the first excited state of 57Fe using a state-of-the-art pixelized silicon detector, dubbed XRPIX, under an extremely low-background environment. We highlight scientific objectives, experimental design and the latest status of ISAI.