Faraday Cup Development for Beam Monitoring and Cross-Section Measurement of p+12C Elastic Scattering with Ep=0.95-3.2 MeV
N.T. Anh, L.X. Chung*, L.T. Anh, T.T. Anh, M. La Cognata, M.V. Dien, B.T. Hoa, N.T. Hung, P.D. Khue, D.T.K. Linh, N.T. Nghia, N.H. Phuc, N.T.T. Phuc, G.G. Rapisarda, M. Sferrazza, and D.T. Tran
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
Abstract:
A Faraday cup (FC) suitable for nA 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). Firstly, the FC operation was tested with proton beams of 0.8 and 2.63 MeV energies bombarding a 0.081 μm 197 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 Ep =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.
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