Activation of Flibe with 14 MeV DT neutrons

We have prepared and irradiated pellet-shaped Flibe (Li₂BeF₄) samples with 14 MeV DT neutrons. Two irradiations of 1 min and 19 hours duration were carried out and the gamma activation was measured afterwards. Lines of ¹⁹O as well as of ²⁸Al were identified in the short-time measurement. In the longtime irradiation experiment, strong lines from ²⁴Na generated from impurities were found in the gamma spectrum. Special emphasis was put on the detection of ⁷Be and ²²Na since their production rate depends on secondary charged particle reactions. However, in this samples, the ²²Na activity was enhanced originating mainly from impurities. An effective production cross section for ⁷Be was obtained from the experimental data. The irradiations were analyzed with the activation code FISPACT-2005 based on a chemical analysis of impurities in the samples