Faraday Cup Development for Beam Monitoring and Cross-Section Measurement of p ⁺¹² C Elastic Scattering with E_p=0.95-3.2 MeV

A Faraday cup (FC) suitable for nanoampere intensive beams has been developed to be used in nuclear reaction studies using the pelletron at Hanoi University of Science (HUS)–Vietnam National University (VNU). First, the FC operation was tested with proton beams of 0.8- and 2.63-MeV energies bombarding a 0.081- $\mu $ m197 Au target. By varying the high voltage (−HV) applied to the FC’s repeller ring, current increase due to negative charge loss as secondary electron escape was investigated. Saturation was observed at about 50 V in both experiment and simulation using the CST Studio Suite software. Subsequently, the HV was set to −350 V to ensure the measuring current’s precision. Afterward, the FC was used in an experiment to measure the cross sections of p+12C elastic scattering with $E_{p} = 0.95$ –3.2 MeV at the laboratory angles of 50°, 106°, 120°, 130°, and 160° for its validation and further study for this reaction. Good agreement was obtained between our new data and those reported in the literature. The new data were analyzed with the R-matrix approach. The extracted level parameters are consistent with those of previous studies.