Longworth BE, Burton JR, Pendleton SL, Moser SD, Roberts ML, Kurz MD.  2022.  Radiocarbon measurement of CO2 from carbonate minerals using a hybrid gas ion source with an open split interface. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 531:49?55.

Gaylord MCLardie, Longworth BE, Murphy K, Cobb C, McNichol AP.  2019.  Annual radiocarbon measurements in a century-old European beech tree (Fagus sylvatica) from coastal northeastern North America. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. 456:264-270.

Hlavenka JD, Abrams H, Roberts ML, Longworth BE, Fallon S.  2019.  Improved C? efficiency and ion beam currents by modifying SNICS cathode material. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 439:90-93.

Longworth BE, von Reden KF, Long P, Roberts ML.  2015.  A high output, large acceptance injector for the NOSAMS Tandetron AMS system. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:211-216.

Longworth BE, Robinson LF, Roberts ML, Beaupré SR, Burke A, Jenkins W.J.  2013.  Carbonate as sputter target material for rapid C-14 AMS. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms. 294:328-334.