Excitation functions of proton induced nuclear reactions on highly enriched 78Kr: Relevance to the production of 75Br and 77Br at a small cyclotron

✍ Scribed by F. Tárkányi; Z. Kovács; S.M. Qaim

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 606 KB
• Volume: 44
• Category: Article
• ISSN: 0969-8043
• DOI: 10.1016/0969-8043(93)90114-p

✦ Synopsis

Excitation functions were measured for 'sKr(p,pn)"Kr, 'sKr(p,x)"Br and 7*Kr(p,a)75Br reactions from threshold to 20 MeV by the activation technique using 99.4% enriched 78Kr as target gas. There is a strong discrepancy between our data and the literature values for the 78Kr(p,pn)77Kr and 78Kr(p,a)'5Br reactions. Differential and integral yields of 77Kr, "Br and 7SBr were calculated from our excitation functions. The calculated integral yields of 75Br and "Br are approximately in agreement with the low-current irradiation experimental yield data reported in the literature. The thick target yields of both 75Br and "Br at a small cyclotron (E, zz 17 MeV) are small [1.9 mCi (70 MBq)/pAh and 70 PCi (2.6 MBq)/pAh, respectively] and due to the very high cost of the target gas, the two production processes are uneconomical. At a medium-sized cyclotron with Er, 3 25 MeV, however, the "Br yield would be appreciably higher and the process could be very suitable for production of "Br.