Excitation functions of 74Se(d,xn)75,74mBr reactions: Comparative evaluation of possible routes for the production of 75Br at a small cyclotron

✍ Scribed by S.M. Qaim; G. Stöcklin

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 419 KB
• Volume: 44
• Category: Article
• ISSN: 0969-8043
• DOI: 10.1016/0969-8043(93)90097-t

✦ Synopsis

Excitation functions were measured for the tirst time for 748e(d,n)'SBr and "Se(d,2n)""'Br reactions from threshold to 23 MeV. Use was made of the stacked-foil technique, and thin samples were prepared by electrolytic deposition of 3 1.4% enriched %e. on Al-backing. Differential and integral yields of 7bBr and 75Br were calculated from the measured excitation functions. The optimum energy range for the production of 75Br via the 74Se(d,n)-process was found to be Ed = 12 -P 8 MeV, with 7SBr-yield amounting to 5WMBq (13.75mCi)/pAh and the 7bBr impurity to < 1%. A comparative evaluation of the two routes, namely 7*Kr(p,a)7SBr and 748e(d,n)7sBr, suggested for the production of 75Br at a small cyclotron is given. The (d,n) reaction gives higher yield than the @,a) process and is preferable at cyclotrons with Ed 2 10 MeV. In general, at a small cyclotron the achievable batch yields of "Br via both the processes are limited.