Formation of medical radioisotopes 111In, 117m Sn, 124Sb, and 177Lu in photonuclear reactions

Abstract

The possibility of the photonuclear production of radioisotopes 111 In, 117m Sn, 124 Sb, and 177 Lu is discussed. Reaction yields were measured by the gamma-activation method. The enriched tin isotopes 112,118 Sn and Te and HfO 2 of natural isotopic composition were used as targets. The targets were irradiated at the linear electron accelerator of Alikhanian National Science Laboratory (Yerevan) at the energy of 40 MeV. The experimental results obtained in this way reveal that the yield and purity of radioisotopes 111 In and 117m Sn are acceptable for their production via photonuclear reactions. Reactions proceeding on targets from Te and HfO 2 of natural isotopic composition and leading to the formation of 124 Sb and 177 Lu have small yields and are hardly appropriate for the photoproduction of these radioisotopes even in the case of enriched targets.

Measurement and theoretical analysis of the excitation functions for 3He induced reactions on natSn

“…Excitation functions of light charged particle induced nuclear reactions are required for testing prediction capabilities of nuclear reaction codes as well as for optimization of large scale production of medically relevant diagnostic or therapeutic radioisotopes. Some radioisotopes of tin like 117m Sn, antimony like 117,118,122,124 Sb and tellurium like 123m Te have medical or industrial use [1][2][3][4][5][6][7]. For that, many light charged particle induced nuclear reactions on elements in this region have been investigated.…”

Исследование возбуждения изомерных состояний в реакциях (γ,n) и (n,2n) на ядрах 81Br и 92Mo

“…Изомерные отношения, т.е. отношения выходов и сечений реакций образования остаточных ядер в изомерном и основном состояниях, зависят от спина ядра-мишени и вносимого углового момента, который определяется массой и энергией бомбардирующей частицы, а также механизмом реакции, свойствами возбужденных состояний как в непрерывной, так и в дискретной областях [1][2][3][4][5]. Таким образом, по данным об изомерных отношениях исследуются механизмы ядерных реакций и статистические свойства возбужденных состояний атомных ядер.…”