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정양수 충남대학교 기초과학연구소 2000 忠南科學硏究誌 Vol.27 No.2
Differential cross sections of electron-impact excitation to various levels of helium were measured and compared to previously published results. Electron energy loss technique was used in this experiment, and the scattering angles were from 10 to 140°. The results fairly agreed with published data except for few points.