High-energy photon beam production with laser-Compton backscattering
High-energy photon beam production with laser-Compton backscattering
复制标题
DOI：
10.1016/j.nima.2003.08.153
复制
发表时间：
2004-01
影响因子：
1.4
通讯作者：
K. Aoki;K. Hosono;T. Hadame;H. Munenaga;K. Kinoshita;M. Toda;S. Amano;S. Miyamoto;T. Mochizuki;M. Aoki;Dazhi Li
中科院分区：
文献类型：
--
作者：
K. Aoki;K. Hosono;T. Hadame;H. Munenaga;K. Kinoshita;M. Toda;S. Amano;S. Miyamoto;T. Mochizuki;M. Aoki;Dazhi Li
我们通过康普顿后向散射，从存储环中循环的1 GeV电子中产生1064 nm激光光子，产生了一束高能伽马射线。用HPGe探测器测量后向散射光子的能谱，发现20、10和2 mm φ准直器的最大能量为17.6 MeV，测量的能谱与模拟计算一致，而探测到的光子产率分别约为4×103, 2×103and 3×102photons s−1mA−1W−1。准直器的光子能量宽度分别为6.6 ~ 17.6 MeV、12.4 ~ 17.6 MeV和17.3 ~ 17.6 MeV。利用这些光子，我们用衰减法测量了197au在E1巨共振能区的总核光吸收截面，证明了光子衰减法将成为研究光子核反应的有用工具。
We have produced a beam of high-energy gamma-rays by Compton backscattering of 1064 nm laser photons from 1 GeV electrons circulating in a storage ring. Measuring the energy spectra of the backscattering photons with an HPGe detector, we have found that the maximum energy of 17.6 MeV and the measured energy spectra show agreement with the simulation calculations, while the detected photon yields were measured at about 4×103, 2×103and 3×102photons s−1mA−1W−1for the 20, 10 and 2 mm φ collimators, respectively. The photon energy widths from the collimators correspond to 6.6–17.6 MeV , 12.4–17.6 MeV and 17.3–17.6 MeV , respectively. By using these photons, we measured the total nuclear photoabsorption cross-sections in the E1 giant resonance energy region for197Au using the attenuation method and we have demonstrated that the photon attenuation method will be a useful tool for studying photonuclear reactions.