PhysicsTUCAN Sets New Detected Ultracold Neutron RateA spallation-driven source combines heavy-water and liquid-deuterium moderation with superfluid helium conversion to reach 6.75×10⁵ detected UCN/s.nucl-exphysicsAug 18, 20264 min2607.03033
PhysicsKaonic Deuterium X-Rays Expose the K−n Threshold InteractionSIDDHARTA-2 isolates rare deuterium X-rays with timing-selected silicon detectors, measuring an −810.9 eV 1s shift and 812 eV width.nucl-exphysicsAug 13, 20265 min2608.10749
PhysicsSuperSUN Sustains High-Density Ultracold Neutron ProductionSuperfluid helium conversion below 0.6 K delivers 21,000 s⁻¹ continuous extraction and 273 cm⁻³ saturated storage density.hep-exnucl-exphysicsJul 28, 20264 min2504.13030
PhysicsSIDDHARTA-2 Tightens Kaonic Hydrogen 1s ConstraintsA 237 pb⁻¹ DAΦNE X-ray spectrum fit measures the 1s shift and width with about 2× better precision than SIDDHARTA.nucl-exphysicsJul 28, 20264 min2607.13952
PhysicsMicrocalorimeter Muonic Spectroscopy Sharpens Beryllium-9 RadiusA metallic magnetic calorimeter measures the muonic 2p→1s x ray at 33,391.48(34) eV, yielding a 2.5506(51) fm charge radius.nucl-exnucl-thphysicsJul 28, 20264 min2607.13690
