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We pursue a novel morphometric analysis to detect sources in very-high-energy gamma-ray counts maps by structural deviations from the background noise without assuming any prior knowledge about potential sources. The rich and complex…

Instrumentation and Methods for Astrophysics · Physics 2017-10-11 Michael A. Klatt , Klaus Mecke

Radiation transport models of two high purity germanium detectors, GeII and GeIII, located at the University of Alabama have been created in GEANT4 \cite{geant4}. These detectors have been used extensively for radioassay measurements of…

Instrumentation and Detectors · Physics 2019-04-30 R. H. M. Tsang , A. Piepke , D. J. Auty , B. Cleveland , S. Delaquis , T. Didberidze , R. MacLellan , Y. Meng , O. Nusair , T. Tolba

The study of the neutron response and n-gamma discrimination for small (18x26x8) mm3 liquid scintillator BC501A (Bicron) detector was carried out by digital charge comparison method. Three ranges of neutron energies were used: uniform…

Nuclear Experiment · Physics 2016-08-16 J. Černý , Z. Doležal , M. P. Ivanov , E. S. Kuzmin , J. Švejda , I. Wilhelm

A novel concept for detection and spectroscopy of gamma rays, and detection of thermal neutrons based on codoped lanthanum fluoride nanocrystals containing gadolinium is presented.The trends of colloidal synthesis of the mentioned material,…

We report a novel correlated background in the antineutrino detection using the inverse beta decay reaction. Spontaneous fissions and $(\alpha,n)$ reactions in peripheral materials of the antineutrino detector, such as borosilicate glass of…

Instrumentation and Detectors · Physics 2021-12-01 Zhiyuan Chen , Xin Zhang , Zeyuan Yu , Jun Cao , Changgen Yang

We present simulation results for the detection of ultra-high energy (UHE) cosmic ray (CR) and neutrino interactions in the Moon by radio-telescopes. We simulate the expected radio signal at Earth from such interactions, expanding on…

Astrophysics · Physics 2009-06-23 C. W. James , R. J. Protheroe

Context. Ultra fast outflows (UFOs) from active galactic nuclei (AGN) are expected to lead to the formation of sub-relativistic strong shocks expanding in a dense circumnuclear medium, and thus have the potential for being efficient…

High Energy Astrophysical Phenomena · Physics 2026-05-06 B. Le Nagat Neher , E. Peretti , P. Cristofari , A. Zech

In our Ultra-Fast Astronomy (UFA) program, we aim to improve measurements of variability of astronomical targets on millisecond and shorter time scales. In this work, we present initial on-sky measurements of the performance of silicon…

Instrumentation and Methods for Astrophysics · Physics 2020-12-18 Albert Wai Kit Lau , Mehdi Shafiee , George F. Smoot , Bruce Grossan , Siyang Li , Zhanat Maksut

We calculate fission $\gamma$ rays for neutron-induced reactions on $^{239}$Pu with the Hauser-Feshbach fission fragment decay model. By applying the calculated fission $\gamma$ rays as a background contribution, the historical…

Nuclear Theory · Physics 2025-10-30 Toshihiko Kawano , Amy E. Lovell , Patrick Talou , Lee A. Bernstein

In this work we explore for the first time the applicability of using $\gamma$-ray imaging in neutron capture measurements to identify and suppress spatially localized background. For this aim, a pinhole gamma camera is assembled, tested…

The simultaneous observation of gamma rays and neutrinos from the same astrophysical source offers a unique opportunity to probe particle acceleration and interaction mechanisms in ultra-high-energy environments. The Cherenkov Telescope…

High Energy Astrophysical Phenomena · Physics 2025-09-17 Gloria Maria Cicciari , Manuela Mallamaci , Giovanni Marsella , Alberto Rosales de León , Olga Sergijenko , Giovanna Ferrara

We present a study of GaN single-nanowire ultraviolet photodetectors with an embedded GaN/AlN superlattice. The heterostructure dimensions and doping profile were designed in such a way that the application of positive or negative bias…

Neutron detection provides an effective method to detect, locate, and characterize sources of interest to nuclear security applications. Current neutron imaging systems based on double-scatter kinematic reconstruction provide good signal…

In the framework of rare event searches, the identification of radioactive contaminants in ultra-pure samples is a challenging task, because the signal is often at the same level of the instrumental background. This is a rather common…

Instrumentation and Detectors · Physics 2021-11-10 G. Baccolo , A. Barresi , M. Beretta , D. Chiesa , M. Nastasi , L. Pagnanini , S. Pozzi , E. Previtali , M. Sisti , G. Terragni

The measurement of gamma-rays from decaying nuclei allow for the investigation into nuclear structure. True coincidence summing occurs when two gamma-rays from a single decay get detected in a single detector and their energies sum together…

Instrumentation and Detectors · Physics 2026-02-16 Liam Schmidt

A novel method is presented which will enhance the sensitivity of neutrino telescopes to identify transient sources such as Gamma-Ray Bursts (GRBs) and core-collapse Supernovae (SNe). Triggered by the detection of high energy neutrino…

Astrophysics · Physics 2008-11-26 Marek Kowalski , Anna Mohr

The most challenging and impactful uncertainties that future accelerator-based measurements of neutrino oscillations must overcome stem from our limited ability to model few-GeV neutrino-nucleus interactions. In particular, it is crucial to…

A portable monoenergetic 24 keV neutron source based on the $^{124}$Sb-$^9$Be photoneutron reaction and an iron filter has been constructed and characterized. The coincidence of the neutron energy from SbBe and the low interaction…

Challenging neutron-capture cross-section measurements of small cross sections and samples with a very limited number of atoms require high-flux time-of-flight facilities. In turn, such facilities need innovative detection setups that are…

Instrumentation and Detectors · Physics 2024-12-02 J. Balibrea-Correa , V. Babiano-Suarez , J. Lerendegui-Marco , C. Domingo-Pardo , I. Ladarescu , A. Tarifeño-Saldivia , G. de la Fuente-Rosales , B. Gameiro , N. Zaitseva , V. Alcayne , D. Cano-Ott , E. González-Romero , T. Martínez , E. Mendoza , A. Pérez de Rada , J. Plaza del Olmo , A. Sánchez-Caballero , A. Casanovas , F. Calviño , S. Valenta , O. Aberle , S. Altieri , S. Amaducci , J. Andrzejewski , M. Bacak , C. Beltrami , S. Bennett , A. P. Bernardes , E. Berthoumieux , R. Beyer , M. Boromiza , D. Bosnar , M. Caamaño , M. Calviani , D. M. Castelluccio , F. Cerutti , G. Cescutti , S. Chasapoglou , E. Chiaveri , P. Colombetti , N. Colonna , P. Console Camprini , G. Cortés , M. A. Cortés-Giraldo , L. Cosentino , S. Cristallo , S. Dellmann , M. Di Castro , S. Di Maria , M. Diakaki , M. Dietz , R. Dressler , E. Dupont , I. Durán , Z. Eleme , S. Fargier , B. Fernández , B. Fernández-Domínguez , P. Finocchiaro , S. Fiore , V. Furman , F. García-Infantes , A. Gawlik-Ramikega , G. Gervino , S. Gilardoni , C. Guerrero , F. Gunsing , C. Gustavino , J. Heyse , W. Hillman , D. G. Jenkins , E. Jericha , A. Junghans , Y. Kadi , K. Kaperoni , G. Kaur , A. Kimura , I. Knapová , M. Kokkoris , Y. Kopatch , M. Krtìvcka , N. Kyritsis , C. Lederer-Woods , G. Lerner , A. Manna , A. Masi , C. Massimi , P. Mastinu , M. Mastromarco , E. A. Maugeri , A. Mazzone , A. Mengoni , V. Michalopoulou , P. M. Milazzo , R. Mucciola , F. Murtas , E. Musacchio-Gonzalez , A. Musumarra , A. Negret , P. Pérez-Maroto , N. Patronis , J. A. Pavón-Rodríguez , M. G. Pellegriti , J. Perkowski , C. Petrone , E. Pirovano , S. Pomp , I. Porras , J. Praena , J. M. Quesada , R. Reifarth , D. Rochman , Y. Romanets , C. Rubbia , M. Sabaté-Gilarte , P. Schillebeeckx , D. Schumann , A. Sekhar , A. G. Smith , N. V. Sosnin , M. E. Stamati , A. Sturniolo , G. Tagliente , D. Tarrío , P. Torres-Sánchez , E. Vagena , V. Variale , P. Vaz , G. Vecchio , D. Vescovi , V. Vlachoudis , R. Vlastou , A. Wallner , P. J. Woods , T. Wright , R. Zarrella , P. Zugec

The Nab (Neutron a b) experiment is designed to measure the beta-antineutrino angular correlation in free neutron $\beta$ decay with an ultimate precision goal of 0.1%, providing input for tests of Cabibbo-Kobayashi-Maskawa (CKM) matrix…

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