No abstract available

[en] A primary target for the production of fission products in a nuclear reactor, such as uranium or plutonium fission products, is comprised of an enclosed, cylindrical vessel, preferably comprised of stainless steel, having a thin, continuous, uniform layer of fissionable material, integrally bonded to its inner walls and a port permitting access to the interior of the vessel. A process is also provided for depositing uranium material on to the inner walls of the vessel. Upon irradiation of the target with neutrons from a nuclear reactor, radioactive fission products, such as molybdenum-99, are formed, and thereafter separated from the target by the introduction of an acidic solution through the port to dissolve the irradiated inner layer. The irradiation and dissolution are thus effected in the same vessel without the necessity of transferring the fissionable material and fission products to a separate chemical reactor. Subsequently, the desired isotopes are extracted and purified. Molybdenum-99 decays to technetium-99m which is a valuable medical diagnostic radioisotope. 3 claims, 1 drawing figure

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[en] Short communication

[en] A parameter-free statistical model is used to study multiplicity signatures for coherent production of charged pairs of parabosons of order p=2 in comparison with those arising in the case of ordinary bosons, p= 1. Two non-negative real parameters arise because ''ab'' and ''ba'' are fundamentally distinct pair operators of charge ''+1'', A-quanta and charge ''-1'', B-quanta parabosons. In 3D plots of P_m(q)≡ ''the probability of m paraboson charged pairs+q positive parabosons'' versus left angle n right angle and left angle n² right angle, the p=1 curve is found to lie on the relatively narrow 2D p=2 surface. (orig.)

[en] Short communication

No abstract available

[en] Radioisotope, radiopharmaceutical and cyclotron technologies are extensively developed, increasing the contribution to solve the problem of community. Radioisotopes can be produced by neutron irradiation in a nuclear reactor or by irradiation of charged particles using a cyclotron. Along with the development of radioisotope technology, new radioisotopes or new radioisotope production methods have been successfully developed. Cyclotron utilization technology continues to evolve by utilizing high energy charged particles. Several radioisotope and radiopharmaceutical production technologies, as well as the utilization of cyclotron have been successfully developed in Indonesia. Research and development results in the form of diagnostic agents, therapeutic agents, radioassay technologies and radioactive tracers have been successfully obtained. In the development of diagnostic agents, several diagnostic radioisotope and radiopharmaceutical production technologies have been successfully developed. Some of the production technologies have been utilized by pharmaceutical industry to meet the needs of community. In therapeutic agent, production technologies of therapeutic radioisotope, therapeutic radiopharmaceutical and sealed source have been developed. In radioassay technology development, production technologies of radioimmunoassay (RIA) / immunoradiometric assay (IRMA) kits and the utilization of radioligand binding assay (RBA) have been successfully developed. In the radioactive tracers, production technologies of tracers for industry, biomedical research, natural resources and the environment management have been successfully obtained. The next challenge is the utilization of the technologies, so that the technologies are more beneficial to the community. In the utilization of the technologies, intensive cooperation among research and development institutions, industries, users and regulatory bodies are required. (author)