Faraday Cup Development for Beam Monitoring and Cross-Sectional Measurement of p+12C Elastic Scattering With Ep = 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-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.