A smoothing method for X-ray spectrum based on best beamforming

► Based on the fact that X-ray spectrum is not time series but angle series, a new measuring model for X-ray spectrum is built up. ► A new smoothing method for X-ray spectrum based on best beamforming is proposed. ► An array cell number selection method is proposed. Appling this method, we can get smooth X-ray spectrum with high resolution.