Multiple studies confirm that the Moon's surface regolith is continuously exposed to solar wind and cosmic rays, and contains measurable natural radioactivity from isotopes and implanted particles.
The claim states that the surface regolith of the Moon contains measurable natural radioactivity from solar wind and cosmic rays. Papers [0], [5], and [9] detail how the lunar regolith is continuously bombarded by solar wind particles and galactic cosmic rays. Paper [11] directly measures radioactive elements (radium-226 and radon-222) in lunar samples, demonstrating measurable natural radioactivity. No papers refute the claim.