AhKin: A modular and efficient code for the Doppler shift attenuation method

摘要: Abstract We present a set of programs for measuring lifetimes τ nuclear states by the Doppler shift attenuation method (DSAM). The algorithms are based on analysis probabilistic model processes occurring during DSAM experiment. This allows us to formulate calculation theoretical lineshape as application an integral transform that converts probability density cascade time (the elapsed from nucleus creation state decay) into (scaled) photon energy in laboratory reference frame. kernel this transform, which encapsulates information related nuclei stopping and detection, is independent decay process, hence needs not be recalculated every trial candidate -value, allowing fast computation lineshapes. Further efficiency gained using approximate continuous random variables suitably chosen discrete ones. These codes were used measure sidefeeding times excited normally deformed bands 83Y (Rodriguez, et al. 2019) finding all good agreement between experimental best-fitting one. Program summary Title: AhKin Files doi: http://dx.doi.org/10.17632/559kb329p2.1 Licensing provisions: MIT Programming language: C++ Nature problem: Measurement method. involves simulating measured spectrum (lineshape) photons emitted transitions traveling material. reduction velocity relates lifetime observed photon’s energy. assumed value producing best approximates spectrum. Solution method: A lineshapes evaluation Doppler-shifted need value, permitting swift Additional algorithmic obtained approximating