略語大辞典 [Phys] 21 TNA thermal neutron analysis 熱中性子分析. 熱中性子で原子核を活性化して発生する特性ガンマ線を検出して物質を分析する手法.thermal neutron analysis; a nuclear technique for detecting anomalously high concentrations of nitrogen by means of activation by thermal neutrons; a bath of thermal neutrons, generated by a californium-2 丸善「略語大辞典」JLogosID : 11852258