Year: 2026
Type: preprint
Abstract: The Collinear Resonance for Exotic Molecules and Atoms (CREMA) setup has been developed and commissioned at the Massachusetts Institute of Technology's Laboratory for Nuclear Science. The instrument combines the Doppler-suppressed resolution of the collinear fast-beam geometry with the selectivity of resonance ionization, for precision measurements of hyperfine structure and isotope shifts in atoms and molecules. We describe the setup, including the ion-optical simulations in which a multi-objective evolutionary algorithm provided the starting settings for the beam transport, and report commissioning measurements of the hyperfine structure of 133Cs. The extracted hyperfine constants agree with literature values within one standard deviation, demonstrating the operational readiness of the setup. CREMA mirrors the Resonance Ionization Spectroscopy Experiment at the Facility for Rare Isotope Beams and serves as its offline counterpart for the development of laser ionization schemes and techniques for future studies of exotic atoms and molecules.
Source: arXiv (Cornell University)
Authors: Cruz, Fabian C. Pastrana, Wilkins, Shane G., Brinson, Alex J., Fischer, Paul, Flayol, Mathieu, Gonzalez-Acevedo, Derick, Hacias, Jackson, Huskey, Jason, Kakioka, Haruka, Kanitz, Carina, Karthein, Jonas, Lechner, Simon, Malbrunot-Ettenauer, Stephan, Moroch, Scott, Munoz, Jose M., Reiter, Moritz P., Reponen, Mikael, Schweikhard, Lutz, Udrescu, Silviu M., Vernon, Adam R., Vilen, Markus, Ruiz, Ronald F. Garcia
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223382352