New measurement of the $^{55}$Mn($\gamma$, n)$^{54}$Mn cross-section within the range of giant dipole resonance

new measurement of the $^{55}$Mn($\gamma$, n)$^{54}$Mn cross-section within the range of giant dipole resonance were measured using a laser Compton scattering (LCS) $\gamma$-rays at the Shanghai Laser Electron Gamma Source (SLEGS), Shanghai Synchrotron Radiation Facility (SSRF). Based on a fine iterative deconvolution framework that integrates polynomial regression and Support Vector Regression (SVR), the non‑physical oscillations introduced by conventional spline interpolation in the threshold extrapolation region are effectively suppressed.

This enables the extraction of monoenergetic cross sections for the $^{55}$Mn photoneutron reaction.