Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Towards Implanting Radioactive Polar Molecules in a Noble Gas Matrix for Fundamental Symmetry Tests

Jul 20, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Precision measurement and tests of fundamental physics Poster session


Nuclear Schiff moments (NSMs) present a powerful probe into new physics through their connection to CP-symmetry violation. We are investigating the application of molecular matrix methods to NSM searches of radioactive isotopes, particularly radium-225, which has an enhanced Schiff moment resulting from its octupole deformations. These methods involve trapping polar molecules in a noble gas matrix, which is predicted to lock their orientation relative to the lattice vectors. In this contribution, we focus on the portion of the FRIB EDM$^3$ instrument, currently in the design stage, that will create and implant the polar molecules in the substrate. The instrument’s beamline starts with a spray-based ion source that will be used to efficiently ionize aqueous harvested radioisotopes. The spray will be collected by a dual ion funnel which will perform initial filtering of background ions. Then the ions will be analyzed by mass-to-charge ratio using a quadrupole mass filter, and then be neutralized in a charge-exchange cell. Finally, the molecules will be co-deposited along with a noble gas matrix. We will report on the design of this high-efficiency molecular beam source and the progress of its construction.

Presenter name Nicholas Nusgart
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Primary authors

Nicholas Nusgart (Michigan State University) Dr Jochen Ballof (Michigan State University) Peyton Lelain (Michigan State University) Prof. Jaideep Singh (Michigan State University)

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