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SUMMARY:INPA Seminar Speaker: Lorenzo Magrini (Stanford)-Title: A search for short-range new interactions with Mössbauer spectroscopy
DESCRIPTION:Date: May 8\, 2026 \nTime: 12:00 pm – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: Lorenzo Magrini (Stanford) \nTitle: A search for short-range new interactions with Mössbauer spectroscopy \nAbstract: New light particles\, predicted by many proposed extensions of the Standard Model\, would manifest as short-range forces between matter. At the nanoscale\, electromagnetism is overwhelming\, masking anything weaker. Nuclei\, on the other hand\, sit shielded inside their electron cloud — making them an exceptionally clean place to look. The recoilless 14.4 keV transition in ⁵⁷Fe gives access to this channel with a natural linewidth of ~5 × 10⁻⁹ eV!\nI will present an ongoing experiment at Stanford that uses this resonance to probe new interactions between nuclei in the 20–400 nm range. A ⁵⁷Co source illuminates a thin ⁵⁷Fe absorber\, while a gold source mass in close proximity would shift the resonance line through the new interaction. I will discuss the design\, the systematics that set the ultimate reach\, and what we hope to see. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-tbd-6/
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