INVESTIGATIONS OF ANCIENT COINS USING LASER-INDUCED BREAKDOWN SPECTROSCOPY
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2018, Vol 65, Issue 278
Abstract
LIBS applications in analysis of chemical composition of selected ancient coins are described in the paper. In the introduction a review of typical physical phenomena present in LIBS experiments is given, problems related to correct interpretation of LIBS emission spectra are shortly discussed. Next part of the paper is devoted to short description of experimental setup and its essential components. In the Chapter 3 works on determination of chemical composition of Greek and Roman coins are presented. Results of analysis of chemical composition of the coins using calibration LIBS approach with the aid of statistical multivariate factorial analysis are shown. For octodrachm a stratigraphy method was applied which revealed a complex structure of superficaial encrustations covering the coin surface. Summary includes author’s opinion on presented results and a short comment on problems related to quantitative LIBS measurements.<br/><br/>
Authors and Affiliations
Wojciech SKRZECZANOWSKI
WZORCE ODPOWIEDZI DIELEKTRYCZNEJ W DZIEDZINIE CZĘSTOTLIWOŚCI IZOLACJI CELULOZOWEJ O RÓŻNYM ZAWILGOCENIU SYCONEJ ESTREM SYNTETYCZNYM
W większości transformatorów stosowany jest układ izolacyjny papier-olej mineralny. Do nielicznych wad oleju mineralnego można zaliczyć palność, wybuchowość oraz nieznaczną toksyczność. Alternatywą dla oleju mineralnego...
ORGANIC RANKINE CYCLES IN POWER GENERATION SYSTEMS
The paper presents possible applications of Organic Rankine Cycles (ORC) in decentralized energy generation systems. The basic elements of these systems and methods of working fluid selection were discussed. ORC systems...
THE DRIVE OF THE TOURIST VEHICLE PASSENGER-CARGO
Article presents the concept of the drive of the tourist vehicle, passenger-cargo with a total weight up to one ton. The drive consists of two convertors controlled by one control circuit, and two motors mounted in the w...
CRYOGENIC SOURCES OF IRRADIATION
In the paper are described cryogenic sources of irradiation, basing on the case of large accelerator system of the Nuclotron, built in JINR in Dubna, Russia. In this device beams of light ions, protons and of heavy ions...
MATHEMATICAL MODEL OF THE PERMANENT MAGNET FIELD IN THE AIR GAP OF ELECTRICAL MACHINE
The paper deals with an analytical model of the magnetic field in the air gap of electrical machine with permanent magnets. In this model, the source of radial and tangential magnet fields can be assumed as a system of e...