In ultraperipheral collisions (UPC) of nuclei the impact of Lorentz-contracted electromagnetic fields of collision partners leads to their excitations. In case of heavy nuclei the emission of neutrons is a main deexcitation channel and forward neutrons emitted in UPC were detected at the Relativistic Heavy-Ion Collider (RHIC) and at the Large Hadron Collider (LHC) by means of Zero Degree Calorimeters. However, the excitation of low-lying discrete nuclear states is also possible in UPC below the neutron separation energy. In this work by means of the Weizsacker–Williams method the data on nuclear resonance fluorescence (NRF) induced by real photons in \(^{208}\)Pb are used to model the excitations of discrete levels in colliding nuclei. Due to Lorentz boosts one can expect that deexcitation photons with energies up to 40 GeV and 300 GeV are emitted in very forward direction, respectively, at the LHC and at the Future Circular Collider (FCC-hh). Energy, rapidity and angular distributions of such photons are calculated in the laboratory system, which can be used for monitoring of collider luminosity or triggering particle production in UPC.

在原子核的超周边碰撞（UPC）中，碰撞伙伴的洛伦兹收缩电磁场的影响导致其激发。在重核的情况下，中子的发射是主要的去激通道，通过零度量热仪在相对论重离子对撞机（RHIC）和大型强子对撞机（LHC）上检测到UPC中发射的正向中子。但是，在中子分离能以下的UPC中也可以激发低位离散核态。在这项工作中，我们通过Weizsacker–Williams方法获得了由\（^ {208} \）中的真实光子诱导的核共振荧光（NRF）数据。Pb用于模拟碰撞原子核中离散水平的激发。由于洛伦兹的增强，人们可以预期，在大型强子对撞机和未来圆形对撞机（FCC-hh）上，能量分别高达40 GeV和300 GeV的去激发光子会以非常向前的方向发射。这种光子的能量，速度和角度分布是在实验室系统中计算的，可用于监视对撞机的发光度或触发UPC中的粒子产生。