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  1. Article ; Online: Neutron spectrometry with Bonner Spheres for area monitoring in particle accelerators.

    Bedogni, Roberto

    Radiation protection dosimetry

    2011  Volume 146, Issue 4, Page(s) 383–394

    Abstract: Selecting the instruments to determine the operational quantities in the neutron fields produced by particle accelerators involves a combination of aspects, which is peculiar to these environments: the energy distribution of the neutron field, the ... ...

    Abstract Selecting the instruments to determine the operational quantities in the neutron fields produced by particle accelerators involves a combination of aspects, which is peculiar to these environments: the energy distribution of the neutron field, the continuous or pulsed time structure of the beam, the presence of other radiations to which the neutron instruments could have significant response and the large variability in the dose rate, which can be observed when moving from areas near the beam line to free-access areas. The use of spectrometric techniques in support of traditional instruments is highly recommended to improve the accuracy of dosimetric evaluations. The multi-sphere or Bonner Sphere Spectrometer (BSS) is certainly the most used device, due to characteristics such as the wide energy range, large variety of active and passive detectors suited for different workplaces, good photon discrimination and the simple signal management. Disadvantages are the poor energy resolution, weight and need to sequentially irradiate the spheres, leading to usually long measurement sessions. Moreover, complex unfolding analyses are needed to obtain the neutron spectra. This work is an overview of the BSS for area monitoring in particle accelerators.
    MeSH term(s) Equipment Design/methods ; Humans ; Neutrons ; Occupational Exposure/prevention & control ; Particle Accelerators/instrumentation ; Photons ; Radiation Dosage ; Radiation Monitoring/instrumentation ; Radiation Protection ; Radiometry ; Reproducibility of Results ; Sensitivity and Specificity ; Spectrum Analysis/instrumentation
    Language English
    Publishing date 2011-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/ncr238
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Characterization of Thermoluminescent Dosimeters for Neutron Dosimetry at High Altitudes.

    D'Avino, Vittoria / Ambrosino, Fabrizio / Bedogni, Roberto / Campoy, Abner Ivan C / La Verde, Giuseppe / Vernetto, Silvia / Vigorito, Carlo Francesco / Pugliese, Mariagabriella

    Sensors (Basel, Switzerland)

    2022  Volume 22, Issue 15

    Abstract: Neutrons constitute a significant component of the secondary cosmic rays and are one of the most important contributors to natural cosmic ray radiation background dose. The study of the cosmic ray neutrons' contribution to the dose equivalent received by ...

    Abstract Neutrons constitute a significant component of the secondary cosmic rays and are one of the most important contributors to natural cosmic ray radiation background dose. The study of the cosmic ray neutrons' contribution to the dose equivalent received by humans is an interesting and challenging task for the scientific community. In addition, international regulations demand assessing the biological risk due to radiation exposure for both workers and the general population. Because the dose rate due to cosmic radiation increases significantly with altitude, the objective of this work was to characterize the thermoluminescent dosimeter (TLDs) from the perspective of exposing them at high altitudes for longtime neutron dose monitoring. The pair of TLD-700 and TLD-600 is amply used to obtain the information on gamma and neutron dose in mixed neutron-gamma fields due to the present difference in 6Li isotope concentration. A thermoluminescence dosimeter system based on pair of TLD-600/700 was characterized to enable it for neutron dosimetry in the thermal energy range. The system was calibrated in terms of neutron ambient dose equivalent in an experimental setup using a 241Am-B radionuclide neutron source coated by a moderator material, polyethylene, creating a thermalized neutron field. Afterward, the pair of TLD-600/700 was exposed at the CERN-EU High-Energy Reference Field (CERF) facility in Geneva, which delivers a neutron field with a spectrum similar to that of secondary cosmic rays. The dosimetric system provided a dose value comparable with the calculated one demonstrating a good performance for neutron dosimetry.
    MeSH term(s) Altitude ; Americium ; Humans ; Neutrons ; Radiation Dosage ; Radiation Dosimeters ; Thermoluminescent Dosimetry
    Chemical Substances Americium-241 (SK9YL6NK5M) ; Americium (VW92PHU2UY)
    Language English
    Publishing date 2022-07-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s22155721
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  3. Article ; Online: Validation of an indium-based multi-shell neutron spectrometer.

    Asuncion-Astronomo, Alvie / Balderas, Charlotte V / Hila, Frederick C / Dela Cruz, Rafael Miguel M / Dingle, Cheri Anne M / Solmeron, Williard B / Bedogni, Roberto

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2021  Volume 170, Page(s) 109629

    Abstract: A multi-shell neutron spectrometer with indium foil detector (In-MuNS) was developed to evaluate intense neutron fields that are generated in medical accelerators. The response matrix of this new spectrometer was calculated from 1 meV to 100 MeV using ... ...

    Abstract A multi-shell neutron spectrometer with indium foil detector (In-MuNS) was developed to evaluate intense neutron fields that are generated in medical accelerators. The response matrix of this new spectrometer was calculated from 1 meV to 100 MeV using MCNP5 v.1.6 with ENDF/B-VIII.0 nuclear data. An experiment with a
    Language English
    Publishing date 2021-02-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2021.109629
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  4. Article ; Online: REVISION OF ISO 8529-REFERENCE NEUTRON RADIATIONS.

    Thomas, David / Bedogni, Roberto / Méndez, Roberto / Thompson, Alan / Zimbal, Andreas

    Radiation protection dosimetry

    2017  Volume 180, Issue 1-4, Page(s) 21–24

    Abstract: ISO Standard 8529, on Reference neutron radiations, is due for revision. This paper covers proposed changes to Part 1 which dates from 2001. The changes are mainly designed to improve the data on radionuclide source neutron spectra, but also include ... ...

    Abstract ISO Standard 8529, on Reference neutron radiations, is due for revision. This paper covers proposed changes to Part 1 which dates from 2001. The changes are mainly designed to improve the data on radionuclide source neutron spectra, but also include options for modifying the content, e.g. the section on reactor filtered beams.
    MeSH term(s) Humans ; Neutrons ; Radiation Dosage ; Radiation Monitoring/instrumentation ; Radiation Monitoring/standards ; Radiation Protection/instrumentation ; Radiation Protection/standards ; Reference Standards
    Language English
    Publishing date 2017-11-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/ncx176
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  5. Book ; Online: Detecting Iron Oxidation States in Liquids with the VOXES Bragg Spectrometer

    Manti, Simone / Miliucci, Marco / Scordo, Alessandro / Bedogni, Roberto / Clozza, Alberto / Iliescu, Mihail / Moskal, Gabriel / Piscicchia, Kristian / Porcelli, Alessio / Sirghi, Diana / Sirghi, Florin / Curceanu, Catalina

    2023  

    Abstract: Determining the oxidation states of metals assumes great importance in various applications because a variation in the oxidation number can drastically influence the material properties. As an example, this becomes evident in edible liquids like wine and ...

    Abstract Determining the oxidation states of metals assumes great importance in various applications because a variation in the oxidation number can drastically influence the material properties. As an example, this becomes evident in edible liquids like wine and oil, where a change in the oxidation states of the contained metals can significantly modify both the overall quality and taste. To this end, here we present the MITIQO project, which aims to identify oxidation states of metals in edible liquids utilizing X-ray emission with Bragg spectroscopy. This is achieved using the VOXES crystal spectrometer, developed at INFN National Laboratories of Frascati (LNF), employing mosaic crystal (HAPG) in the Von Hamos configuration. This combination allow us to work with effective source sizes of up to a few millimeters and improves the typical low efficiency of Bragg spectroscopy, a crucial aspect when studying liquids with low metal concentration. Here we showcase the concept behind MITIQO, for a liquid solution containing oxidized iron. We performed several high-resolution emission spectra measurements, for the liquid and for different powdered samples containing oxidized and pure iron. By looking at the spectral features of the iron's K$\beta$ emission lineshape, we were able to obtain, for a liquid, a result consistent with the oxidized iron powders and successfully quantifying the effect of oxidation.
    Keywords Physics - Applied Physics
    Subject code 660
    Publishing date 2023-10-09
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Investigation of induced radioactivity in the Linac-Adone accelerator complex for the management of the decommissioned material.

    Mora, Juan Carlos / Bedogni, Roberto / Esposito, Adolfo / Cancio, David

    Health physics

    2007  Volume 92, Issue 3, Page(s) 236–241

    Abstract: The LINAC-ADONE accelerator complex of the INFN-LNF Frascati National Laboratories, operating for 27 y prior to the commissioning of DAPhiNE, was dismantled in 1993. The scraps resulting from the decommissioning of LINAC-ADPhiNE have been temporarily ... ...

    Abstract The LINAC-ADONE accelerator complex of the INFN-LNF Frascati National Laboratories, operating for 27 y prior to the commissioning of DAPhiNE, was dismantled in 1993. The scraps resulting from the decommissioning of LINAC-ADPhiNE have been temporarily stored in the same Frascati laboratory, waiting for definitive disposal. Relying on recommendations of the IAEA, European Commission and Italian committees, an experimental characterization study of the LNF repository was performed. The main objective was a classification of the scraps on the basis of internationally recognized "clearance levels," which are 0.1 Bq g(-1) for the isotopes of interest for this work. Secondly, a measurement of the materials suspected to be above 0.1 Bq g(-1) was planned. Activation isotopes were expected from the aluminum, copper, steel, and iron of the LINAC and the ADONE ring sections. For screening purposes, the repository area has been divided into zones, where in-situ measurements with a portable HP-Ge detector have been performed. In addition, small samples have been cut from a representative number of pieces, and accurate laboratory measurements have been made with a low background HP-Ge spectrometer. The experimental results are in good agreement with other studies and show that a large part of the material is below the mentioned specific activity level.
    MeSH term(s) Gamma Rays ; Particle Accelerators ; Radiation Dosage ; Radiation Monitoring/methods ; Radiation Protection ; Radioactive Waste/analysis ; Radioisotopes/analysis ; Spectrometry, Gamma
    Chemical Substances Radioactive Waste ; Radioisotopes
    Language English
    Publishing date 2007-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2406-5
    ISSN 1538-5159 ; 0017-9078
    ISSN (online) 1538-5159
    ISSN 0017-9078
    DOI 10.1097/01.HP.0000244857.90015.b9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.MO 253: Show issues

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  7. Article: Analysis of computational problems expressing the overall uncertainties: photons, neutrons and electrons.

    de Carlan, Loïc / Price, Robert / Chartier, Jean-Louis / Kodeli, Ivan / Siebert, Bernd / Henninger, Jürgen / Posselt, Jonas / Gualdrini, Gianfranco / Agosteo, Stefano / Bedogni, Roberto / Bordy, Jean-Marc / Cassette, Philippe / Ferrari, Paolo / Gomez Ros, Jose-Maria / Grosswendt, Bernd / Lacoste, Véronique / Pola, Andrea / Rollet, Sofia / Schultz, Franck /
    Simakov, S P / Tanner, Rick / Terrissol, Michel / Zankl, Maria

    Radiation protection dosimetry

    2008  Volume 131, Issue 1, Page(s) 15–23

    Abstract: In the frame of the EU Coordination Action CONRAD (coordinated network for radiation dosimetry), WP4 was dedicated to work on computational dosimetry with an action entitled 'Uncertainty assessment in computational dosimetry: an intercomparison of ... ...

    Abstract In the frame of the EU Coordination Action CONRAD (coordinated network for radiation dosimetry), WP4 was dedicated to work on computational dosimetry with an action entitled 'Uncertainty assessment in computational dosimetry: an intercomparison of approaches'. Participants attempted one or more of eight problems. This paper presents the results from problems 4-8-dealing with the overall uncertainty budget estimate; a short overview of each problem is presented together with a discussion of the most significant results and conclusions. The scope of the problems discussed here are: the study of a (137)Cs calibration irradiator; the manganese bath technique; the iron sphere experiment using neutron time-of-flight technique; the energy response of a RADFET detector and finally the sensitivity and uncertainty analysis for the recoil-proton telescope discussed in the companion paper.
    MeSH term(s) Algorithms ; Cesium Radioisotopes/chemistry ; Electrons ; Humans ; Manganese/chemistry ; Neutrons ; Photons ; Radiometry/instrumentation ; Radiotherapy Dosage ; Radiotherapy, Computer-Assisted/instrumentation ; Uncertainty
    Chemical Substances Cesium Radioisotopes ; Manganese (42Z2K6ZL8P)
    Language English
    Publishing date 2008
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/ncn221
    Database MEDical Literature Analysis and Retrieval System OnLINE

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