Document Detail


Experimental studies and nuclear model calculations on proton-induced reactions on (nat)Se, (76)Se and (77)Se with particular reference to the production of the medically interesting radionuclides (76)Br and (77)Br.
MedLine Citation:
PMID:  15110356     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Excitation functions of the reactions (nat)Se(p,x)(75,76,77,82)Br, (76)Se(p,xn)(75,76)Br, (76)Se(p,x)(75)Se and (77)Se(p,xn)(76,77)Br were measured from their respective thresholds up to 40 MeV, with particular emphasis on data for the production of the medically important radionuclides (76)Br and (77)Br. The conventional stacked-foil technique was used. The samples were prepared by a sedimentation process. Irradiations were performed using the compact cyclotron CV 28 and the injector of COSY, both at the Research Centre Jülich. In order to validate the data, nuclear model calculations were performed using the code ALICE-IPPE which is based on the preequilibrium-evaporation model. Good agreement was found between the experimental and theoretical data, except in the high-energy region where the calculated data were somewhat higher. All the measured excitation curves were compared with the data available in the literature. From the experimental data the theoretical yields of all the investigated radionuclides were calculated and plotted as a function of proton energy. The calculated yield of (77)Br from the (nat)Se(p,x)(77)Br process over the energy range E(p)=25-->15 is 72.7 MBq/microAh and from the (77)Se(p,n)(77)Br reaction over E(p)=15-->6 MeV it is 86.2 MBq/microAh. The yield of (76)Br from the (76)Se(p,n)(76)Br reaction for E(p)=15-->8 is 360.1 MBq/microAh and from the (77)Se(p,2n)(76)Br reaction for E(p)=28-->18 MeV it is 879.2 MBq/microAh. The radionuclidic impurity levels are discussed.
Authors:
H E Hassan; S M Qaim; Yu Shubin; A Azzam; M Morsy; H H Coenen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine     Volume:  60     ISSN:  0969-8043     ISO Abbreviation:  Appl Radiat Isot     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-04-27     Completed Date:  2004-06-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9306253     Medline TA:  Appl Radiat Isot     Country:  England    
Other Details:
Languages:  eng     Pagination:  899-909     Citation Subset:  IM    
Affiliation:
Institut für Nuklearchemie, Forschungszentrum Jülich GmbH, Jülich D-52425, Germany.
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MeSH Terms
Descriptor/Qualifier:
Bromine Radioisotopes / analysis*
Isotopes
Radioisotopes*
Selenium / analysis*
Chemical
Reg. No./Substance:
0/Bromine Radioisotopes; 0/Isotopes; 0/Radioisotopes; 7782-49-2/Selenium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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