Pramana | |
A high resolution X-ray crystal spectrometer to study electron and heavy-ion impact atomic collisions | |
Ajay Kumar1  Lokesh C Tribedi11  K V Thulasiram1  D Misra1  A H Kelkar1  U R Kadhane1  | |
[1] Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India$$ | |
关键词: Crystal spectrometer; X-rays; highly charged ions; electron impact; ionization.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
We have studied fast ion–atom and electron–atom collision processes using a reconditioned high resolution X-ray spectrometer. The X-rays, generated by the collisions, are dispersed by a curved ADP crystal (Johansson geometry) and detected by a gas proportional counter. A self-written LabVIEW based program has been used to give precise and controlled movement to the crystal and for data acquisition. The performance was tested by detecting the K𛼠diagram and satellite lines of several elements. The K𛼠satellite lines of Al have been studied in collision with 3–12 keV electrons and 40 MeV C4+ ions. In ion collisions as large as four L-vacancies are created simultaneously with the K-vacancy, compared to two satellites in case of the e-impact. In addition, we have measured the X-rays from H-, He- and Li-like Si ions which arise due to the electron loss/capture process in highly charged 80 MeV Si7+ ions in collision with thin carbon foil. Approximate charge state distribution has been obtained using this new technique.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040497327ZK.pdf | 682KB | download |