This paper deals with the design of a novel spectrometer of fast neutrons in nuclear safeguards applications based on the liquid organic scintillator EJ-309 with materials of different thickness surrounding the detector. The investigation was performed on the simulated data obtained by the MCNPX-PoliMi numerical code based on the Monte Carlo method. Among the various materials (polyethylene, iron, aluminum, and graphite) investigated as layers around the scintillator, polyethylene and iron have shown the most promising characteristics for evaluation of fast neutron energy spectra. The simulated pulse height distributions were summed up for each energy bin in the neutron energy range between 1 MeV and 15 MeV in order to obtain better counting statistics. The unfolded results for monoenergetic neutron sources obtained by a first order of Tikhonov regularization and non-linear neural network show very good agreement with the reference data while the evaluated spectra of neutron sources continuous in energy follow the trend of the reference spectra. The possible advantages of a novel spectrometer include a less number of input data for processing and a less sensitivity to the noise compared to the scintillation detector without surrounding materials.

INTRODUCTION Healthcare enlightenment and healthcare culture in Vranje and its region were under Turkish influence until the liberation in 1878, when the organisation of education, schooling and healthcare were initiated in the Vranje region OBJECTIVE The aims of this study were to shed light on the beginning of the development of pharmaceutical personnel, and their contribution to healthcare culture development in Vranje and its region, with a focus on healthcare legislation and its impact on pharmaceutical service availability, and the analysis of pharmaceutical personnel development within the healthcare services. METHODS We used the methods of documentation analysis and the desk analysis of the secondary information. RESULTS At the beginning of the 19th century healthcare services in Vranje were still inexistent. After the liberation from the Turks, Naum's medical office with pharmacy was opened in Vranje. Although it did not comply with regulations, it presented the only formal source of supply of medications and sanitary material, and as such it gave its contribution to healthcare service at that time in Vranje. Mr ph. Stevan Varjacic, 1st class pharmacy assistant, worked at a temporary hospital from 1880 until January 1881, suppling with medications soldiers and residents of Vranje. The development of pharmaceutical schooling began in 1883, when a pharmacy was opened by the pharmacist Velimir Karic according to the Law on Healthcare Organisation and People's Healthcare Maintenance. By the end of the 1930s there were ten civilian healthcare institutions in Vranje, even three of which were pharmacies. By the end of 1948, they were nationalized, and were renamed the City National Pharmacy of Vranje. CONCLUSION By the end of the 10th century, passing of the legislation on the regulations of pharmaceutical industry within healthcare services had an impact on Vranje that resulted in opening pharmacies with educated pharmaceutical personnel. Pharmacy owners changed, and the quality and continuity of medical supplies was always secured.