PreprintCC BY 4.0arXiv
Solar axions from nuclear transitions
Abstract
We investigate the possibility of detecting 14.4~keV and 9.4~keV solar axions and axion-like particles that could be produced in the M1 nuclear transitions of 57Fe and 83Kr, respectively. To do so, we used data from soft X-ray observations of the quiet Sun collected by the Solar X-ray Monitor (XSM) on board India's Chandrayaan-2 lunar mission. We observe that although the effective axion-nucleon couplings for 83Kr and 57Fe differ only slightly, their fluxes differ by nearly three orders of magnitude. Consequently, the limit on |gaNeff × gaγγ| and only gaγγ vs. ma provide more than one order of magnitude stronger constraint for Fe than for Kr.
Versions
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BibTeX
@misc{kumar2026solar,
title = {{Solar axions from nuclear transitions}},
author = {Tanmoy Kumar and Newton Nath},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2605.24121},
eprint = {2605.24121},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.24121},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Solar axions from nuclear transitions
AU - Tanmoy Kumar
AU - Newton Nath
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2605.24121
UR - https://arxiv.org/abs/2605.24121
AB - We investigate the possibility of detecting 14.4~keV and 9.4~keV solar axions and axion-like particles that could be produced in the M1 nuclear transitions of ^57Fe and ^83Kr, respectively. To do so, we used data from soft X-ray observations of the quiet Sun collected by the Solar X-ray Monitor (XSM) on board India's Chandrayaan-2 lunar mission. We observe that although the effective axion-nucleon couplings for ^83Kr and ^57Fe differ only slightly, their fluxes differ by nearly three orders of magnitude. Consequently, the limit on |g_aN^eff × g_aγγ| and only g_aγγ vs. m_a provide more than one order of magnitude stronger constraint for Fe than for Kr.
ER -