Time-resolved cathodoluminescence of DNA triggered by picosecond electron bunches
Despite the tremendous importance of so-called ionizing radiations (X-rays, accelerated electrons and ions) in cancer treatment, most studies on their effects have focused on the ionization process itself, and neglect the excitation events the radiations can induce. Here, we show that the excited st...
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| Veröffentlicht in: | Scientific reports 2020-03, Vol.10 (1), p.5071-5071, Article 5071 |
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| creator | Renault, Jean Philippe Lucas, Bruno Gustavsson, Thomas Huetz, Alain Oksenhendler, Thomas Staicu-Casagrande, Elena-Magdalena Géléoc, Marie |
| description | Despite the tremendous importance of so-called ionizing radiations (X-rays, accelerated electrons and ions) in cancer treatment, most studies on their effects have focused on the ionization process itself, and neglect the excitation events the radiations can induce. Here, we show that the excited states of DNA exposed to accelerated electrons can be studied in the picosecond time domain using a recently developed cathodoluminescence system with high temporal resolution. Our study uses a table-top ultrafast, UV laser-triggered electron gun delivering picosecond electron bunches of keV energy. This scheme makes it possible to directly compare time-resolved cathodoluminescence with photoluminescence measurements. This comparison revealed qualitative differences, as well as quantitative similarities between excited states of DNA upon exposure to electrons or photons. |
| doi_str_mv | 10.1038/s41598-020-61711-x |
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| subjects | 140/125 639/638/440/94 639/766/747 Chemical Sciences Deoxyribonucleic acid DNA DNA - radiation effects Electrons Electrons - adverse effects Humanities and Social Sciences Ionization Luminescent Measurements - methods Material chemistry multidisciplinary Photons Radiation, Ionizing Science Science (multidisciplinary) Time Factors |
| title | Time-resolved cathodoluminescence of DNA triggered by picosecond electron bunches |
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