Temat: energy resolution - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Light yield non-proportionality and intrinsic energy resolution of doped CsI scintillators
Autorzy:: Chewpraditkul, W.
Swiderski, L.
Moszynski, M.
Tematy:: scintillators
doped CsI
non-proportionality of light yield
energy resolution
intrinsic resolution; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/146750.pdf Link otwiera się w nowym oknie
Opis:: The light yield non-proportionality and energy resolution of doped CsI scintillators have been studied for gamma-ray energies ranging from 16.6-1274.5 keV. The light yield non-proportionality of about 20% and the energy resolution of 7.6 š 0.4% for 662 keV gamma-rays have been achieved for empty set 25 mm × 25 mm CsI(Na) crystal, coupled to an XP 5200 photomultiplier tube. The intrinsic resolution of the crystals vs. energy of gamma-rays has been determined after correcting the measured resolution for photomultiplier tube statistics. The different shapes of intrinsic resolution curves observed with various samples of doped CsI are discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Characterization of some modern scintillators recommended for use on large fusion facilities in γ-ray spectroscopy and tomographic measurements of γ-emission profiles
Autorzy:: Sibczynski, P.
Broslawski, A.
Gojska, A.
Kiptily, V.
Korolczuk, S.
Kwiatkowski, R.
Mianowski, S.
Moszyński, M.
Rzadkiewicz, J.
Swiderski, L.
Szydlowski, A.
Zychor, I.
Tematy:: gamma spectrometry
scintillators
decay time
non-proportionality
energy resolution
detection efficiency
fusion plasma; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/146137.pdf Link otwiera się w nowym oknie
Opis:: LaBr3:Ce,CeBr3 and GAGG:Ce scintillators were investigated and the determined characteristics were compared with those obtained for the well-known and widely used CsI:Tl and NaI:Tl crystals. All the detectors were of the same size of 10 × 10 × 5 mm3. The aim of this test study was to single out scintillation detectors most suitable for γ-ray spectrometry and γ -ray emission radial profile measurements in high-temperature plasma experiments. Decay time, energy resolution, non-proportionality and full energy peak detection efficiency were measured for γ -ray energies up to 1770 keV. Due to their good energy resolution, short decay time and high detection efficiency for MeV gamma rays, LaBr3:Ce and CeBr3 scintillators are proposed as the best candidates for use especially under conditions of high count rates, which are expected in the forthcoming DT experiments.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Charged projectile spectrometry using solid-state nuclear track detector of the PM-355 type
Autorzy:: Malinowska, A.
Jaskóła, M.
Korman, A.
Szydłowski, A.
Malinowski, K.
Kuk, K.
Tematy:: solid-state nuclear track detectors (SSNTDs)
PM-355
energy resolution of proton and deuteron
calibration diagrams
track mean gray level; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/146945.pdf Link otwiera się w nowym oknie
Opis:: To use effectively any radiation detector in high-temperature plasma experiments, it must have a lot of benefits and fulfill a number of requirements. The most important are: a high energy resolution, linearity over a wide range of recorded particle energy, high detection efficiency for these particles, a long lifetime and resistance to harsh conditions existing in plasma experiments and so on. Solid-state nuclear track detectors have been used in our laboratory in plasma experiments for many years, but recently we have made an attempt to use these detectors in spectroscopic measurements performed on some plasma facilities. This paper presents a method that we used to elaborate etched track diameters to evaluate the incident projectile energy magnitude. The method is based on the data obtained from a semiautomatic track scanning system that selects tracks according to two parameters, track diameter and its mean gray level.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Charakterystyka detektora kwantów gamma na potrzeby projektu SABAT
Characterization of gamma quanta detector for the SABAT sensor
Autorzy:: Miś, Anna
Opis:: Celem pracy było scharakteryzowanie detektora scyntylacyjnego z kryształem LaBr3: Ce: Sr na potrzeby projektu SABAT, polegającego na wykorzystaniu neutronów do wykrywania materiałów niebezpiecznych. Taki detektor ma najlepszą rozdzielczość energetyczną spośród materiałów scyntylacyjnych. Przeprowadzone badania obejmowały pomiar rozdzielczości energetycznej dla standardowych źródeł promieniotwórczych oraz dla pierwiastków aktywowanych przez szybkie neutrony (w źródle AmBe) emitujące kwanty gamma o wysokiej energii. Wykonane pomiary dotyczyły takich wielkości jak: rozdzielczość energetyczna, rozdzielczość czasowa, długość tłumienia światła oraz wydajność świetlną. Rozdzielczość energetyczna linii cezu (662 keV) wynosiła około 3%. To najlepszy wynik, jaki można uzyskać stosując kryształ jako materiał scyntylacyjny. Uwzględniając wyniki rozdzielczości energetycznej, wykreślono i sparametryzowano jej zależność od energii kwantów gamma. Przedstawiono również zależność wyników od odległości między kryształem a kolimatorem ze źródłem. Badanie wykazało, że taki detektor jest liniowy. Pomiary długości tłumienia światła wykazały, że dla wyższych napięć ładunek detektora maleje wykładniczo wraz ze zmniejszającą się odległością punktu naświetlania od fotokatody.
The aim of this work was to characterize scintillation detector with LaBr3:Ce:Sr crystal for SABAT project, involving the use of neutrons in the detection of hazardous materials. Such a detector has the best energy resolution among such materials.The performed research included measuring energy resolution for standard radioactive sources and for elements activated by fast neutrons (in AmBe source) emitting high energy gamma quanta. The performed measurements concerned such quantities as: energy resolution, time resolution, light attenuation length and light output. The energetic resolution for the Cesium line (662 keV) was about 3%. This is the best result that can be obtained when using a crystal as a scintillation material. Taking into account the results of the energy resolution, its dependence on the energy of gamma quanta was plotted and parameterized. Also plotted how the results depends on the distance between crystal and collimator with source. The study showed that such a detector is linear. The measurements of light attenuation length revealed, that for higher vlotages the charge output of the detector decreases exponentially with decreasing distance of irradiation point to the photocathode.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 5.

Tytuł:: Studies of properties of scintillation materials applicable in the identification hazardous materials.
Badanie właściwości materiałów scyntylacyjnych pod kątem zastosowania w identyfikacji substancji niebezpiecznych
Autorzy:: Miś, Anna
Opis:: Celem pracy było zbadanie energetycznej zdolności rozdzielczej wybranych materiałów scyntylacyjnych: jodku sodu aktywowanego talem (NaI:Tl), fluorku baru (BaF2), germanku bizmutu (BGO), krzemianu lutetu domieszkowanego cerem (LSO:Ce) oraz bromku lantanu domieszkowanego cerem i strontem (LaBr3:Ce:Sr), które możnawykorzystać do pomiaru widm aktywacyjnych. Badane były widma energetyczne standardowychźródeł promieniotwórczych kwantów gamma (22Na, 137Cs, 133Ba, 60Co).Wybrano najlepszy materiał scyntylacyjny, z którego będzie wykonany detektor kwantów gamma w urządzeniu do nieinwazyjnego wykrywania materiałów niebezpiecznychw środowisku wodnym budowanego w Instytucie Fizyki UJ w ramach projektu SABAT.Zgodnie z oczekiwaniami, okazał się nim bromek lantanu domieszkowany cerem.
The purpose of this work was an examination of the energy resolution of selected scintillation materials: NaI:Tl, BaF2, BGO, LSO:Ce and LaBr3:Ce:Sr and to select the best one for building a novel underwater threat detector SABAT. The scintillators were tested with a set of standard gamma quanta sources with energies up to 1.3 MeV. It has been found that the best scintillation material for gamma quanta detector in SABAT is LaBr3:Ce:Sr.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Rozstrzyganie sporów cywilnoprawnych w drodze decyzji administracyjnej przez Prezesa Urzędu Regulacji Energetyki
Autorzy:: Kurzawa, Angelika
Tematy:: dispute, civil matter, administrative decision, resolution, President of the Energy Regulatory Office; Pokaż więcej
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:: https://bibliotekanauki.pl/articles/680918.pdf Link otwiera się w nowym oknie
Opis:: Resolution of Civil-Law Disputes by Means of the Administrative Decision of the President of the Energy Regulatory OfficeThe purpose of this article is to present the process of resohdng civil-law disputes by the President of the Energy Regulatory Office by means of an administrative decision under the Energy Law Act. In accordance with the provisions of Article 8(1) of the Energy Law Act, The President of the Energy Regulatory Office is authorised to re-solve disputes referred to in that provision which inherently belong to matters of civil law. Pursuant to Article 2(1) of the Code of Civil Procedurę, civil matters arę heard by common courts of law, except for those delegated to other bodies in special provisions referred to in Article 2(2). An example of such a special provision is Article 8 of the Energy Law Act, which excludes the admissibility of court proceedings in certain disputes to be resolved by the President of the Energy Regulatory Office. Thus, cases of disputes referred to in Article 8 of the Energy Law Act involve on the one hand a strictly civil law dispute and on the other a public authority (central government authority) which is to settle this dispute in a manner appropriate for it using its powers and non-equivalence of entities. Conseąuently, the civil-legal relationship characterised by voluntariness and equivalence of entities is shaped imperatively and unilaterally by a public authority by means of the administrative decision.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The utility of virtual monochromatic dual-energy computed tomography (DECT) in meniscal imaging : a technical evaluation
Autorzy:: Adams, Scott
Reis, Jodie
Shepel, Michael
van Heerden, Jacques
Mondal, Prosanta
Obaid, Haron
Opis:: Purpose: To determine the feasibility of meniscal imaging using virtual monochromatic images obtained through dualenergy computed tomography (DECT) technique, and to determine which keV levels optimise contrast resolution. Material and methods: All DECT exams were performed on a Discovery CT750 HD system from GE Healthcare. Virtual monochromatic images were reconstructed at 40 keV, 73 keV, 106 keV, and 139 keV. Contrast resolution of the medial and lateral menisci using a 5-point Likert scale at each keV level was determined through a consensus agreement by 2 fellowship-trained musculoskeletal radiologists. Friedman's and Wilcoxon signed rank tests were used to compare visualisation scores across different keV levels. Results: Seventeen knee exams from 10 patients met criteria for inclusion in the study. All patients included in the study cohort were male. The median age of patients was 46 years (interquartile range, 35-53 years). Virtual monochromatic images at 40 keV demonstrated highest contrast resolution of the menisci, with a statistically significant difference between contrast resolution scores at 40 keV and 76 keV, Friedman test: p < 0.0001.Conclusions: Meniscal imaging is feasible using DECT virtual monochromatic images at low keV levels. Improved contrast resolution at these specified KeV values could pave the way for further research in this field to determine its role in the future as an alternative option for assessment of the menisci in patients with contraindications to MRI or in the setting of a periarticular ferromagnetic foreign body obscuring the field of view.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 8.

Tytuł:: New model of planning and scheduling for job-shop production system with energy consideration
Autorzy:: Hassani, Zineb Ibn Majdoub
El Barkany, Abdellah
El Abbassi, Ikram
Jabri, Abdelouahhab
Tematy:: production
planning
scheduling
MILP
energy
resolution
CPLEX; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/407323.pdf Link otwiera się w nowym oknie
Opis:: This paper reports a new multi-item planning and scheduling problem in a job-shop production system with the consideration of energy consumption. A mixed integer linear programming is proposed to integrate planning and scheduling with the consideration of energy aspect. In this study a new operational constraint is considered in the tactical level because of the huge interest given to energy consumption and its strong link existing with production system. To evaluate the performance of this model, computational experiments are presented, and numerical results are given using the software CPLEX and then discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Graphene Energy Transfer for Single-Molecule Biophysics, Biosensing & Superresolution Microscopy
Autorzy:: Schröder, Tim
Zielonka, Karolina
Tinnefeld, Philip
Kamińska, Izabela
Yaadav, Renukka
Raab, Mario
Zähringer, Jonas
Krause, Stefan
Bohlen, Johann
Schüler, Patrick
Wydawca:: Wiley Online Library
Cytata wydawnicza:: I. Kamińska, J. Bohlen, R. Yaadav, P. Schüler, M. Raab, T. Schröder, J. Zähringer, K. Zielonka, S. Krause, P. Tinnefeld, Graphene Energy Transfer for Single-Molecule Biophysics, Biosensing, and Super-Resolution Microscopy. Adv. Mater. 2021, 33, 2101099. https://doi.org/10.1002/adma.202101099
Opis:: Graphene is considered a game-changing material, especially for its mechanical and electrical properties. This work exploits that graphene is almost transparent but quenches fluorescence in a range up to ≈40 nm. Graphene as a broadband and unbleachable energy-transfer acceptor without labeling, is used to precisely determine the height of molecules with respect to graphene, to visualize the dynamics of DNA nanostructures, and to determine the orientation of Förster-type resonance energy transfer (FRET) pairs. Using DNA origami nanopositioners, biosensing, single-molecule tracking, and DNA PAINT super-resolution with <3 nm z-resolution are demonstrated. The range of examples shows the potential of graphene-on-glass coverslips as a versatile platform for single-molecule biophysics, biosensing, and super-resolution microscopy.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 10.

Tytuł:: Comparison of single and X-wire measurements of streamwise velocity fluctuations in turbulent boundary layer
Autorzy:: Dróżdż, A.
Elsner, W.
Tematy:: turbulent boundary layer
energy spectra
hot-wire spatial resolution; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/281655.pdf Link otwiera się w nowym oknie
Opis:: The paper discusses the problem of measuring velocity fluctuations of a turbulent boundary layer using single and X-wire probes. It seems that the difference between the streamwise fluctuating component of these two probes results not only from spatial resolution, but also from influence of the wall-normal fluctuating component, which is usually not considered. It was shown that the vector summing these two components obtained from X-wire probe gives the shape of fluctuation distribution obtained from a single-wire probe. It implies that the underestimation of the near-wall peak of streamwise fluctuating component in X-wire measurements results from disregarded wall-normal fluctuations, which is obviously taken in the case of a single-wire probe. Moreover, it was shown that the criteria for wire length i.e. l⁺ ≤ 20 could not be sufficient to properly estimate the streamwise and wall-normal fluctuations.
Dostawca treści:: Biblioteka Nauki

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