@misc{oai:repo.qst.go.jp:00072867,
 author = {Hayakawa, Takehito and Shizuma, Toshiyuki and K., Koga Jame and Zen, Heishun and Kii, Toshiteru and Ohgaki, Hideaki and Fujimoto, Masaki and Katoh, Masahiro and 早川 岳人 and 静間 俊行 and コーガ ジェームズ},
 month = {Jun},
 note = {Delbrück scattering, in which a gamma-ray interacting with a Coulomb field creates an electron-position pair, which subsequently annihilates to generate a gamma-ray which energy is almost identical with the incident gamma-ray, is one of important phenomena to study non-linear effects by QED and vacuum polarization. Koga and Hayakawa [1] have presented that it is possible to measure selectively the amplitude of Delbrück scattering using linearly polarized gamma-ray beams. Furthermore, if one uses a linearly polarized beam with energies lower than 1.022 MeV, which is the threshold of the pair creation, it is possible to measure only the virtual process of Delbrück Scattering, namely vacuum polarization. For such a purpose, we have developed a laser Compton scattering (LCS) gamma-ray beam with a CO2 laser having a wavelength of 10 micro m at the UVSOR-III synchrotron radiation facility, in which the energy of the electron beam stored in top-up mode is approximately 750 MeV. We generated a 1-MeV LCS gamma-ray beam. We will also discuss future plans., Nuclear Photonics 2018},
 title = {Laser Compton scattering gamma-ray generation for Delbrück scattering experiments},
 year = {2018}
}