Abstract
A simplified inexpensive apparatus was devised to irradiate specimens at liquid nitrogen temperatures (∼77°K) in a Dewar system. Provisions were also made to maintain the specimen at LN2 temperatures after irradiation for low temperature testing. Using the PSTR at a power level of 1 MW, a specimen can receive 1014 to 1015 n/cm2 integrated fast flux during an irradiation where the Dewar system is filled once. In addition to being inexpensive, the irradiation technique tends to minimize dangers resulting from possible explosions.
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