השוואת שיטות

	ניתוח הפעלה נייטרונית	ניתוח דעיכה רדיואקטיבית
תחום	פיזיקה גרעינית	פיזיקה גרעינית
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1936	1900
הוגה השיטה	George de Hevesy, Hilde Levi	Ernest Rutherford, Frederick Soddy
סוג	analytical measurement technique	analytical process model
מקור מכונן	Chadwick, J. (1932). Possible Existence of a Neutron. Nature, 129(3252), 312.	Evans, R. D. (1955). The Atomic Nucleus. McGraw-Hill.
כינויים	NAA, activation analysis, trace element analysis	decay kinetics, radioactive decay modeling, half-life analysis
קשורות	5	5
תקציר	Neutron activation analysis (NAA) is an analytical technique for determining elemental composition by bombarding samples with neutrons to produce radioactive isotopes, invented by de Hevesy and Levi in 1936. By measuring decay gamma rays from irradiated samples, NAA quantifies trace and major elements with high sensitivity, specificity, and accuracy without requiring destructive dissolution or complex sample preparation.	Nuclear decay analysis is the systematic study of radioactive transformation processes, originating from Rutherford and Soddy's work in the early 1900s. It quantifies the rate and modes of nuclear disintegration using decay constants, half-lives, and branching ratios to predict activity evolution, date samples via radiometric methods, and assess the long-term hazard from radioactive materials.