Browsing by Subject "Gamma rays"

Now showing items 1-20 of 21

    • ANTARES search for neutrino flares from the direction of radio-bright blazars 

      Alves Garre, Sergio; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Belhorma, Bouchra; Bendahman, Meriem; Bertin, Vincent; Bissinger, Matthias; Boumaaza, Jihad (arXiv, 2021)
      Conference report
      Open Access
      In 2017, a high-energy muon neutrino detected by IceCube was found positionally coincident with the direction of a known blazar, TXS 0506+056, in a state of enhanced 훾-ray emission. Soon after, IceCube reported a compelling ...

    • ANTARES upper limits on the multi-TeV neutrino emission from the GRBs detected by IACTs 

      Albert, A.; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aubert, J.-J.; Aublin, J.; Baret, B.; Basa, Stéphane (2021-03-01)
      Article
      Open Access
      The first gamma-ray burst detections by Imaging Atmospheric Cherenkov Telescopes have been recently announced: GRB 190114C, detected by MAGIC, GRB 180720B and GRB 190829A, observed by H.E.S.S. A dedicated search for neutrinos ...

    • Calibration of gamma radiation beams of a secondary standards dosimetry laboratory: Programme Feixos19 

      Costa Vargas, Daniel (Universitat Politècnica de Catalunya, 2019-05-23)
      Master thesis
      Open Access
      Covenantee:   Institut de Tècniques Energètiques (INTE)
      In this project, a new software called “Feixos19” is developed to allow defining the experimental conditions to calibrate protection monitors or to irradiate passive dosemeters with gamma beams in the calibration and ...

    • Conceptual design of a hybrid neutron-gamma detector for study of ß-delayed neutrons at the RIB facility of RIKEN 

      Tarifeño Saldivia, Ariel Esteban; Taín Enríquez, José Luis; Domingo Pardo, César; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Phong, V.H.; Riego Pérez, Albert; Agramunt Ros, Jorge; Algora, A. (2017-04-07)
      Article
      Open Access
      The conceptual design of the BRIKEN neutron detector at the radioactive ion beam factory (RIBF) of the RIKEN Nishina Center is reported. The BRIKEN setup is a complex system aimed at detecting heavy-ion implants, ß particles, ...

    • Constraining the contribution of Gamma-Ray Bursts to the high-energy diffuse neutrino flux with 10 years of ANTARES data 

      Alves Garre, Sergio; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Belhorma, Bouchra; Bendahman, Meriem; Bertin, Vincent; Bissinger, Matthias; Boumaaza, Jihad (arXiv, 2021)
      Conference report
      Open Access
      Addressing the origin of the observed diffuse astrophysical neutrino flux is one of the main challenges in the context of the neutrino astronomy nowadays. Among several astrophysical sources, Gamma-Ray Bursts (GRBs) are ...

    • Constraining the contribution of gamma-ray bursts to the high-energy diffuse neutrino flux with 10 yr of ANTARES data 

      Albert, A.; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aubert, J.-J.; Aublin, J.; Baret, Bruny; Basa, S. (Oxford University Press, 2021-02-01)
      Article
      Open Access
      Addressing the origin of the astrophysical neutrino flux observed by IceCube is of paramount importance. Gamma-Ray Bursts (GRBs) are among the few astrophysical sources capable of achieving the required energy to contribute ...

    • Determinación de la dosis ambiental equivalente H*(10) a partir de espectrometría gamma con detector de LaBr3 

      López de Abajo, Héctor (Universitat Politècnica de Catalunya, 2011-09)
      Master thesis (pre-Bologna period)
      Open Access
      El presente informe tiene como objetivo principal la obtención de la dosis ambiental equivalente (H*(10)) a partir del espectro obtenido mediante el análisis de la amplitud de los impulsos producidos por la radiación ...

    • Determining the probability of locating peaks using computerized peak-location methods in gamma-ray spectra as a function of the relative peak-area uncertainty 

      Ali Santoro, María Del Carmen; Boshkova, Tatiana; Anagnostakis, Mario J.; Camacho García, Antonia; Fornaciari Iljadica, Marra C.; Collins, Sean M.; Ubiratan Delgado, José (2020-01-01)
      Article
      Open Access
      The probabilities of locating peaks with a high relative peak-area uncertainty were determined empirically with nine types of peak-location software used in laboratories engaged in gamma-ray spectrometry measurements. It ...

    • Estudio de una galga de retrodispersión de radiación gamma 

      Tello Guizado, Josué Eduardo (Universitat Politècnica de Catalunya, 2019-07)
      Bachelor thesis
      Open Access
      El presente informe es un estudio sobre la optimización de la configuración de una galga inclinada de retrodispersión que es un sistema formado por un detector de centelleo 3”x3” de NaI, una fuente de radiación gamma, 60Co ...

    • Estudio radiológico de blindajes para fotones basados en poli(metil metacrilato) dopado con plomo 

      Grande González, Juan Carlos (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2013)
      Master thesis
      Restricted access - author's decision
      El objetivo de este proyecto es conocer el comportamiento del PMMA plomado frente a la radiación gamma como material constituyente de los blindajes transparentes destinados a atenuar este tipo de radiación. Para ello se ...

    • Gamma rays from Type Ia supernova SN 2014j 

      Churazov, Eugene; Sunyaev, Rashid; Isern Vilaboy, Jordi; Bikmaev, I; Bravo Guil, Eduardo; Chugai, Nikolai; Grebenev, Sergei; Jean, Pierre; Knodlseder, Jurgen; Lebrun, François; Kuulkers, Eric (2015-10-08)
      Article
      Open Access
      The whole set of INTEGRAL observations of Type Ia supernova SN 2014J, covering the period 19–162 days after the explosion, has been analyzed. For spectral fitting the data are split into early and late periods covering ...

    • Joint Constraints on Galactic Diffuse Neutrino Emission from the ANTARES and IceCube Neutrino Telescopes 

      Albert, A.; André, Michel; Anghinolfi, Marco; Ardid Ramírez, Miguel; Aubert, J.-J. (Institute of Physics (IOP), 2018-12-01)
      Article
      Open Access
      The existence of diffuse Galactic neutrino production is expected from cosmic-ray interactions with Galactic gas and radiation fields. Thus, neutrinos are a unique messenger offering the opportunity to test the products ...

    • Measurement of the Ce 140 (n,y) cross section at n_TOF and its astrophysical implications for the chemical evolution of the universe 

      Amaducci, Simone; Colonna, Nicola; Cosentino, Luigi; Cristallo, Sergio; Finocchiaro, Paolo; Krticka, Milan; Massimi, Cristian; Mastromarco, Mario; Mazzone, Annamaria; Maugeri, Emilio Andrea; Mengoni, Alberto; Roederer, Ian U.; Straniero, Oscar; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere (American Institute of Physics (AIP), 2024-03-21)
      Article
      Open Access
      140 Ce (n, y) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty˜5%) at the n_TOF facility, ...

    • Neutron-induced Fission Cross Section of240,242Pu 

      Salvador Castiñeira, P.; Brys, Tomasz; Eykens, Roger; Hambsch, Franz Josef; Gook, A.; Oberstedt, Stephan; Pretel Sánchez, Carme; Sibbens, Geodele; Vanleeuw, David; Vidali, Marzio (2015)
      Conference report
      Open Access
      A sensitivity analysis for the new generation of fast reactors [Salvatores (2008)] has shown the importance of improved cross section data for several actinides. Among them, the240,242Pu(n,f) cross sections require ...

    • Observation of intrinsically bright terrestrial gamma ray flashes fromthe Mediterranean basin 

      Gjesteland, T.; Ostgaard, N.; Laviola, S.; Miglietta, M.M.; Arnone, E.; Marisaldi, Martino; Fuschino, Fabio; Collier, B.; Fabró Tàpia, Ferran; Montañá Puig, Juan (2015-12-14)
      Article
      Open Access

    • Prospects for combined analyses of hadronic emission from gamma-ray sources in the Milky Way with CTA and KM3NeT 

      Unbehaun, Tim; Mohrmann, Lars; Funk, Stefan; Aiello, Sebastiano; Albert, Arnauld; Alves Garre, Sergio; Aly, Zineb; Ambrosone, Antonio; Ameli, Fabrizio; André, Michel; Androutsou, E.; Anghinolfi, Marco; Anguita, M.; Aphecetche, Laurent; Ardid Ramírez, Miguel (springer-Verlag, 2024-02-02)
      Article
      Open Access
      The Cherenkov Telescope Array and the KM3NeT neutrino telescopes are major upcoming facilities in the fields of gamma-ray and neutrino astronomy, respectively. Possible simultaneous production of rays and neutrinos in ...

    • SENTISIM: A hybrid training platform for SLNB in local melanoma staging 

      Hernansanz Prats, Alberto; Pieras Morell, Tomas; Ferrandiz Pulido, Lara; Moreno Ramirez, David; Casals Gelpí, Alicia (Università degli Studi di Genova, 2019)
      Conference report
      Open Access
      Sentinel Lymph Node Biopsy (SLNB) has been established as an accurate procedure for regional melanoma staging. SNLB has a diagnostic significance as biopsy-based staging identifies patients with nodal metastases who may ...

    • Study of the photon strength function of 152SM in resonance neutron capture at n-TOF 

      Marrone, S.; Colonna, Nicola; Krticka, M.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Alvarez Pol, Héctor; Alvarez Velarde, Francisco; Andrzejewski, Józef; Audouin, Ludmila; Berthoumieux, Eric; Capdevila Paramio, Roser; Poch, Agustí; Pretel Sánchez, Carme (PoS - Proceedings of Science, 2018)
      Conference report
      Open Access
      The Photon Strength Function of 152Sm has been investigated at nTOF by studying the ¿-ray spectra from resonance neutron capture of 151Sm. The experimental apparatus consisted of two C6D6 liquid scintillator detectors. The ...

    • The 26.3-h orbit and multiwavelength properties of the 'redback' millisecond pulsar PSR J1306-40 

      Linares Alegret, Manuel (Oxford University Press, 2018-01-01)
      Article
      Open Access
      We present the discovery of the variable optical and X-ray counterparts to the radio millisecond pulsar (MSP) PSR J1306–40, recently discovered by Keane et al. We find that both the optical and X-ray fluxes are modulated ...

    • Tropical TGF paradox: a perspective from TRMM precipitation radar 

      Morales Rodríguez, Carlos Augusto; Montanya Puig, Joan; Van der Velde, Oscar Arnoud; Fabró Tàpia, Ferran; López Trujillo, Jesús Alberto (2021-07-27)
      Article
      Open Access
      The Terrestrial Gamma-ray Flash (TGF) to lightning ratio, computed over the three tropical chimneys, presents a paradox: African thunderstorms produce the most lightning but yield the lowest fraction of TGFs when compared ...