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Photon-photon interaction and gamma-ray vortex generation using laser Compton scattering gamma-rays
https://repo.qst.go.jp/records/66473
https://repo.qst.go.jp/records/66473dc0f2bf5-aa15-43ab-bc12-380be5155f5c
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-10-05 | |||||
| タイトル | ||||||
| タイトル | Photon-photon interaction and gamma-ray vortex generation using laser Compton scattering gamma-rays | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
早川, 岳人
× 早川, 岳人× 早川 岳人 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | QED has predicted interactions between photon and photon, for example scattering of photon with photon, or photon splitting, but such processes have not been understood well because their cross sections are very small. The Delbruck scattering is one of such interactions. Its cross section is much larger than those of other interactions; however, there is a critical problem that it is, in principle, difficult to measure selectively the amplitude of Delbruck scattering from other coherent gamma-ray scattering. Recently, we have calculated the cross sections of Delbruck scattering with linearly polarized gamma-ray beam. We have found the angle at which we can selectively measure the cross section. When the next generation of gamma-ray beam with energy of several MeV at ELI-NP is used for this measurement with 76 day, we can measure Delbruck scattering amplitude with statistical uncertainty of 1%. The second topic is a theoretical proposal for generation of gamma-ray vortex. One of features of gamma-ray vortex is its angular momentum is higher than or equal to 2 hbar. If a gamma-ray vortex interacts on a 0+ even-even nucleus, the excitation of 1- (1+) states such as GDR should be forbidden. This will be a new probe to explore selectively exited states with spin higher than or equal to 2 hbar. Photon vortexes with energies lower than keV have been generated experimentally, but there is no effective method to generate photon vortex in the MeV energy region. We have proposed a method using non-linear Compton scattering on electron with circularly polarized high intense laser, and found that the higher order gamma-rays are vortexes. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | RCNP Colloquium | |||||
| 発表年月日 | ||||||
| 日付 | 2017-09-21 | |||||
| 日付タイプ | Issued | |||||
