Particle Mass Measurements and Strong Interaction Studies with Exotic Atoms Using X-ray Crystal Spectrometer at the Fermilab Main Injector

Precision measurements of X-ray transitions in μ, n, K, p, L, 3 and Q atoms of light elements with crystal spectrometer at the FNAL Main Injector are proposed with aim to improve particle masses including muon neutrino mass limit, to improve hyperon magnetic moments, to measure, at first, hyperon-nucleus spin-orbit interaction, to search for I- n hypemucleus and, if exists, to measure its binding energy. Since April, 1999 when the initial proposal was submitted to FNAL we have developed technology for preparing toroidal surfaces and technique for optical contacting crystal plates with these surfaces. It enables us to design and construct the crystal spectrometer of the reflection type with a double focusing instead of the transmission spectrometer, as suggested in the initial proposal. With a new spectrometer it will be possible to use the relatively thin beam targets (2 cm instead of 20 cm) without any essential losses in event's counting rates and with an improved effect-to-background ratio. Simulations for double focusing scheme are presented, measurements and setup features are discussed.

References(0)

Figures(0)

0 References