| ENVIRAD-SPLASH EXPERIMENT, RESPONSIBLE: Vincenzo Roca |
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ENVIRAD-SPLASH is a collaboration among 5 sections that pursue the same objectives to make students of secondary schools aware of the problematic of the radioactivity and of the radiations and to introduce they in a research activity in environmental physics. In many years of activities it allowed to collect interesting environmental data regarding natural radioactivity in schools, homes and public buildings in many italian regions. In the most recent years the interest field become wider, up to regard analysis of soil and mineral samples, dose measurements and alpha and gamma spectra analysis.
A further extension of interest field is the study of artificial radioactivity, given the current renewed interest in nuclear energy and, in 2011, the Fukushima accident.
This activity implied a meaningful influence on the study of ordinary scholastic subjects.
In the ambit of the project a continuous monitor of radon and climatic parameters was developed (Ramona). Some specimens have was installed in the schools. A new upgraded series has been built and actually it is in phase of installation in the Campi Flaegrei caldera, in the framework of a collaboration with the Osservatorio Vesuviano (regional section of the Istituto Nazionale di Geofisica e Vulcanologia) to study the correlation among radon concentrations in soil and other geochemical and geophysical parameters.
A new branch of the experiment started in Naples during the 2012 year, studying a problem posed by the Argo Experiment, carried out in Tibet (YBJ) in the ambit of the activities of the CSN2. The problem was the high rate produced on the detectors of the experiment (many RPC lying directly on ground, by the gamma rays coming from soil. Since the great part of the radiation source in soil are constituted by radon and thoron daughters, and since the quantity of radon and thoron in soil is variable, depending on the gas fluxes coming from deep earth crust, the continuous measurement of Rn activity in soil gas could be useful for estimate the gamma flux producing the noise observed in the data tacking of Argo.
With the aim to build a network of detectors for carrying out such monitoring, 5 Ramona stations have been realized with a grant of the CSN2, which have been installed in the Argo site at the end of December 2012. The monitoring is started and it is very interesting to underline that the radon and thoron trends are very different respect to those observed in the CFc Caldera. The problems deriving from the low atmospheric pressure, typical of the YBJ site (500 - 600 hpa) have been solved by the characterization of Ramona carried out in the calibration facility in our Radioactivity Laboratory.
Also in Catania a collaboration with the INGV has been carried out.
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| GOALS OF ENVIRAD-SPLASH EXPERIMENT |
The initial objectives of the experiment were: 1) The dissemination of scientific knowledge among young students using experimental work in the field of radioactivity as "troian horse" carrying out the following activities. 2) The measurements of indoor radon concentrations in schools and other interesting buildings and/or structures on the territory, with the aim to obtain data about the exposure of students to radon and its daughters, adopting rigorous protocols and with the collaboration of the students spending their time in the schools. To reach this goal students are introduced in the problematics and the methodologies of the radioactivity study with a two years program which implies various experimental activities. 3) The development of a radon monitor system based on the alpha-particles spectrometry of radon daughters collected by an electric field on a silicon detector. Some systems have been installed in schools.
Since 2009 a new phase of the experiment started, with the installation of some stations in the Campi Flegrei caldera, in the framework of a collaboration with the Osservatorio Vesuviano, the section of the Istituto nazionale di Geofisica e Vulcanologia (OV-INGV) in Campania Region, finalized to optimize the way to use the continuous measurement of the radon concentration in soil for monitoring the dynamics of the earth crust. An extension of this activity began at the end of 2012 regarding the monitoring of the soil radon concentration in the site of the experiment ARGO-YBJ (CSN2), interested to evaluate the amount and the variation of the gamma rays flux coming from soil. Being the radon and thoron daughters responsible of a great part of this gamma activity, the measurement of the radon concentration can help to quantify this background source.
An interesting activity in collaboration with the Sicilian Section of the INGV started also in the Catania Section.
Besides this interest in the problems of geochemistry and geophysics, two objectives complete the perspective of the experiment. On one side the extension of the data base of indoor radon concentrations to other scholastic and no-scholastic environments. On the other side, we are trying, on the basis of the experience gained in many years of work, to setting a methodological and practical approach to put our proposal available to many schools as possible.
With the aim to reach this result, a systematic revision of all kinds of materials (didactic material, laboratory material,..) has been made. The results of this work would be the possibility for the interested schools, to access to this kind of activity also without financing of university or research institutions like the INFN. The INFN sections or Universities which would offer to schools this opportunities, would guarantee the support in terms of teachers formation, provision of materials and instruments, suggestion of study themes. |
| ADDITIONAL INFORMATION ON ENVIRAD-SPLASH EXPERIMENT |
Istituto Nazionale di Fisica Nucleare - Piazza dei Caprettari, 70 - 00186 Roma
tel. +39 066840031 - fax +39 0668307924 - email: presidenza@presid.infn.it
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