Related papers: High energy resolution GeV gamma ray detector

Precision efficiency calibration of a high-purity co-axial germanium detector at low energies

Following work done in the energy region above 100 keV, the high-precision calibration of a co-axial high-purity germanium detector has been continued in the energy region below 100 keV. Previous measurements or Monte-Carlo simulations have…

Instrumentation and Detectors · Physics 2020-04-08 B. Blank , P. Ascher , M. Gerbaux , J. Giovinazzo , S. Grevy , T. Kurtukian Nieto , M. Versteegen , J. C. Thomas

Experimental characterisation of a single-shot spectrometer for high-flux, GeV-scale gamma-ray beams

We report on the first experimental characterisation of a gamma-ray spectrometer designed to spectrally resolve high-flux photon beams with energies in the GeV range. The spectrometer has been experimentally characterised using a…

Instrumentation and Detectors · Physics 2024-02-29 N. Cavanagh , K. Fleck , M. J. V. Streeter , E. Gerstmayr , L. T. Dickson , C. Ballage , R. Cadas , L. Calvin , S. Dobosz Dufrénoy , I. Moulanier , L. Romagnani , O. Vasilovici , A. Whitehead , A. Specka , B. Cros , G. Sarri

Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter

The Galactic positrons, as observed by their annihilation gamma-ray line at 0.511 MeV, are difficult to account for with astrophysical sources. It has been proposed that they are produced instead by dark matter annihilation or decay in the…

Astrophysics · Physics 2009-07-09 John F. Beacom , Nicole F. Bell , Gianfranco Bertone

Collimated GeV attosecond electron-positron bunches from a plasma channel driven by 10 PW lasers

High-energy positrons and bright {\gamma}-ray sources are unique both for fundamental research and practical applications. However, GeV electron-positron pair jets and {\gamma}-ray flashes are still hardly produced in laboratories. Here we…

Plasma Physics · Physics 2018-08-02 Xing-Long Zhu , Zheng-Ming Sheng , Min Chen , Tong-Pu Yu , Su-Ming Weng

Very High Energy Gamma Rays from PSR1706-44

We have obtained evidence of gamma-ray emission above 1 TeV from PSR1706-44, using a ground-based telescope of the atmospheric \v{C}erenkov imaging type located near Woomera, South Australia. This object, a $\gamma$-ray source discovered by…

Astrophysics · Physics 2011-04-04 T. Kifune , CANGAROO Collaboration

Search for sub-GeV dark matter by annual modulation using XMASS-I detector

A search for dark matter (DM) with mass in the sub-GeV region (0.32-1 GeV) was conducted by looking for an annual modulation signal in XMASS, a single-phase liquid xenon detector. Inelastic nuclear scattering accompanied by bremsstrahlung…

Cosmology and Nongalactic Astrophysics · Physics 2019-06-19 M. Kobayashi , K. Abe , K. Hiraide , K. Ichimura , Y. Kishimoto , K. Kobayashi , S. Moriyama , M. Nakahata , H. Ogawa , K. Sato , H. Sekiya , T. Suzuki , A. Takeda , S. Tasaka , M. Yamashita , B. S. Yang , N. Y. Kim , Y. D. Kim , Y. Itow , K. Kanzawa , K. Masuda , K. Martens , Y. Suzuki , B. D. Xu , K. Miuchi , N. Oka , Y. Takeuchi , Y. H. Kim , K. B. Lee , M. K. Lee , Y. Fukuda , M. Miyasaka , K. Nishijima , K. Fushimi , G. Kanzaki , S. Nakamura

A high efficiency, low background detector for measuring pair-decay branches in nuclear decay

We describe a high efficiency detector for measuring electron-positron pair transitions in nuclei. The device was built to be insensitive to gamma rays and to accommodate high overall event rates. The design was optimized for total pair…

Instrumentation and Detectors · Physics 2008-07-08 C. Tur , A. H. Wuosmaa , S. M. Austin , K. Starosta , J. Yurkon , A. Estrade , N. Goodman , J. C. Lighthall , G. Lorusso , S. T. Marley , J. Snyder

The likely detection of pulsed high-energy gamma-ray emission from millisecond pulsar PSR J0218+4232

We report circumstantial evidence for the first detection of pulsed high-energy gamma-ray emission from a millisecond pulsar, PSR J0218+4232, using data collected with the Energetic Gamma Ray Experiment (EGRET) on board the Compton Gamma…

Astrophysics · Physics 2007-05-23 L. Kuiper , W. Hermsen , F. Verbunt , D. J. Thompson , I. H. Stairs , A. G. Lyne , M. S. Strickman , G. Cusumano

Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

High energy cosmic ray electrons plus positrons (CREs), which lose energy quickly during their propagation, provide an ideal probe of Galactic high-energy processes and may enable the observation of phenomena such as dark-matter particle…

High Energy Astrophysical Phenomena · Physics 2017-12-11 G. Ambrosi , Q. An , R. Asfandiyarov , P. Azzarello , P. Bernardini , B. Bertucci , M. S. Cai , J. Chang , D. Y. Chen , H. F. Chen , J. L. Chen , W. Chen , M. Y. Cui , T. S. Cui , A. D'Amone , A. De Benedittis , I. De Mitri , M. Di Santo , J. N. Dong , T. K. Dong , Y. F. Dong , Z. X. Dong , G. Donvito , D. Droz , K. K. Duan , J. L. Duan , M. Duranti , D. D'Urso , R. R. Fan , Y. Z. Fan , F. Fang , C. Q. Feng , L. Feng , P. Fusco , V. Gallo , F. J. Gan , M. Gao , S. S. Gao , F. Gargano , S. Garrappa , K. Gong , Y. Z. Gong , D. Y. Guo , J. H. Guo , Y. M. Hu , G. S. Huang , Y. Y. Huang , M. Ionica , D. Jiang , W. Jiang , X. Jin , J. Kong , S. J. Lei , S. Li , X. Li , W. L. Li , Y. Li , Y. F. Liang , Y. M. Liang , N. H. Liao , H. Liu , J. Liu , S. B. Liu , W. Q. Liu , Y. Liu , F. Loparco , M. Ma , P. X. Ma , S. Y. Ma , T. Ma , X. Q. Ma , X. Y. Ma , G. Marsella , M. N. Mazziotta , D. Mo , X. Y. Niu , X. Y. Peng , W. X. Peng , R. Qiao , J. N. Rao , M. M. Salinas , G. Z. Shang , W. H. Shen , Z. Q. Shen , Z. T. Shen , J. X. Song , H. Su , M. Su , Z. Y. Sun , A. Surdo , X. J. Teng , X. B. Tian , A. Tykhonov , V. Vagelli , S. Vitillo , C. Wang , H. Wang , H. Y. Wang , J. Z. Wang , L. G. Wang , Q. Wang , S. Wang , X. H. Wang , X. L. Wang , Y. F. Wang , Y. P. Wang , Y. Z. Wang , S. C. Wen , Z. M. Wang , D. M. Wei , J. J. Wei , Y. F. Wei , D. Wu , J. Wu , L. B. Wu , S. S. Wu , X. Wu , K. Xi , Z. Q. Xia , Y. L. Xin , H. T. Xu , Z. L. Xu , Z. Z. Xu , G. F. Xue , H. B. Yang , P. Yang , Y. Q. Yang , Z. L. Yang , H. J. Yao , Y. H. Yu , Q. Yuan , C. Yue , J. J. Zang , C. Zhang , D. L. Zhang , F. Zhang , J. B. Zhang , J. Y. Zhang , J. Z. Zhang , L. Zhang , P. F. Zhang , S. X. Zhang , W. Z. Zhang , Y. Zhang , Y. J. Zhang , Y. Q. Zhang , Y. L. Zhang , Y. P. Zhang , Z. Zhang , Z. Y. Zhang , H. Zhao , H. Y. Zhao , X. F. Zhao , C. Y. Zhou , Y. Zhou , X. Zhu , Y. Zhu , S. Zimmer

Observation of gamma rays up to 320 TeV from the middle-aged TeV pulsar wind nebula HESS J1849$-$000

Gamma rays from HESS J1849$-$000, a middle-aged TeV pulsar wind nebula (PWN), are observed by the Tibet air shower array and the muon detector array. The detection significance of gamma rays reaches $4.0\, \sigma$ and $4.4\, \sigma$ levels…

High Energy Astrophysical Phenomena · Physics 2023-09-29 M. Amenomori , S. Asano , Y. W. Bao , X. J. Bi , D. Chen , T. L. Chen , W. Y. Chen , Xu Chen , Y. Chen , Cirennima , S. W. Cui , Danzengluobu , L. K. Ding , J. H. Fang , K. Fang , C. F. Feng , Zhaoyang Feng , Z. Y. Feng , Qi Gao , A. Gomi , Q. B. Gou , Y. Q. Guo , Y. Y. Guo , Y. Hayashi , H. H. He , Z. T. He , K. Hibino , N. Hotta , Haibing Hu , H. B. Hu , K. Y. Hu , J. Huang , H. Y. Jia , L. Jiang , P. Jiang , H. B. Jin , K. Kasahara , Y. Katayose , C. Kato , S. Kato , I. Kawahara , T. Kawashima , K. Kawata , M. Kozai , D. Kurashige , Labaciren , G. M. Le , A. F. Li , H. J. Li , W. J. Li , Y. Li , Y. H. Lin , B. Liu , C. Liu , J. S. Liu , L. Y. Liu , M. Y. Liu , W. Liu , H. Lu , X. R. Meng , Y. Meng , K. Munakata , K. Nagaya , Y. Nakamura , Y. Nakazawa , H. Nanjo , C. C. Ning , M. Nishizawa , R. Noguchi , M. Ohnishi , S. Okukawa , S. Ozawa , X. Qian , X. L. Qian , X. B. Qu , T. Saito , Y. Sakakibara , M. Sakata , T. Sako , T. K. Sako , T. Sasaki , J. Shao , M. Shibata , A. Shiomi , H. Sugimoto , W. Takano , M. Takita , Y. H. Tan , N. Tateyama , S. Torii , H. Tsuchiya , S. Udo , H. Wang , S. F. Wang , Y. P. Wang , Wangdui , H. R. Wu , Q. Wu , J. L. Xu , L. Xue , Z. Yang , Y. Q. Yao , J. Yin , Y. Yokoe , Y. L. Yu , A. F. Yuan , L. M. Zhai , H. M. Zhang , J. L. Zhang , X. Zhang , X. Y. Zhang , Y. Zhang , Yi Zhang , Ying Zhang , S. P. Zhao , Zhaxisangzhu , X. X. Zhou , Y. H. Zou

Testing the 130 GeV gamma-ray line with high energy resolution detectors

Recently some hints of the existence of $\gamma$-ray line around 130 GeV are reported according to the analysis of Fermi-LAT data. If confirmed it would be the first direct evidence to show the existence of new physics beyond the standard…

High Energy Astrophysical Phenomena · Physics 2012-08-16 Ye Li , Qiang Yuan

Gamma Ray Detection Efficiency of GAGG Crystal Scintillator Using Three Tagged Gamma Ray Techniques

A CubeSat with a prototype scintillating detector with a sensitive volume of GAGG crystal is being developed with a possible launch date of 2025. Its purpose is to characterize the background signals that mimic the neutrino interaction that…

Instrumentation and Detectors · Physics 2025-02-05 Brian Doty , Nickolas Solomey , Jonathan Folkerts , Brooks Hartsock , Holger Meyer , Mark Christl , Miguel Rodriguez-Otero , Evgeny Kuznetsov

Energy Resolution studies for NEXT

This work aims to present the current state of simulations of electroluminescence (EL) produced in gas-based detectors with special interest for NEXT --- Neutrino Experiment with a Xenon TPC. NEXT is a neutrinoless double beta decay…

Instrumentation and Detectors · Physics 2011-05-23 C. A. B. Oliveira , M. Sorel , J. Martin-Albo , J. J. Gomez-Cadenas , A. L. Ferreira , J. F. C. A. Veloso

Characterization of a broad energy germanium detector and application to neutrinoless double beta decay search in Ge-76

The performance of a 630g commercial broad energy germanium (BEGe) detector has been systematically investigated. Energy resolution, linearity, stability vs. high-voltage (HV) bias, thickness and uniformity of dead layers have been measured…

Instrumentation and Detectors · Physics 2015-03-17 M. Agostini , E. Bellotti , R. Brugnera , C. M. Cattadori , A. D'Andragora , A. di Vacri , A. Garfagnini , M. Laubenstein , L. Pandola , C. A. Ur

Likely detection of pulsed high-energy gamma-rays from millisecond pulsar PSR J0218+4232

We report on the likely detection of pulsed high-energy gamma-rays from the binary millisecond pulsar PSR J0218+4232 in 100-1000 MeV data from CGRO EGRET. Imaging analysis demonstrates that the highly significant gamma-ray source 2EG…

Astrophysics · Physics 2007-05-23 L. Kuiper , W. Hermsen , F. Verbunt , A. Lyne , I. Stairs , D. J. Thompson , G. Cusumano

Supersymmetric Interpretation of the EGRET Excess in Diffuse Galactic Gamma Rays

Recently it was shown that the excess of diffuse Galactic gamma rays above 1 GeV could be interpreted as a Dark Matter annihilation signal. From the spectral shape of the excess it is possible to determine a range for the allowed WIMP mass…

High Energy Physics - Phenomenology · Physics 2007-10-25 Christian Sander

A Monitor of the Focusing Strength of Plasma Lenses Using MeV Synchrotron Radiation

The focusing strength of plasma lenses used with high energy electron or positron beams can give rise to synchrotron radiation with critical energies in the MeV range. A method is described for measuring the characteristic energy of this…

High Energy Physics - Experiment · Physics 2009-11-07 Clive Field , Gholam Mazaheri , Johnny S. T. Ng

Detection and measurement of gamma rays with the AMS-02 detector

The Alpha Magnetic Spectrometer (AMS-02) will be installed on the International Space Station (ISS). The gamma rays can be measured through gamma conversion into e+e- pair, before reaching the Silicon Tracker or by measurement of a photon…

Astrophysics · Physics 2007-05-23 Simonetta Gentile

Detection of GeV Gamma-rays from HESS J1534-571 and Multiwavelength Implications for the Origin of the Non-thermal Emission

HESS J1534-571 is a very high energy gamma-ray source that was discovered by the H.E.S.S. observatory and reported as one of several new sources with a shell-like morphology at TeV energies, matching in size and location with the supernova…

High Energy Astrophysical Phenomena · Physics 2017-07-05 Miguel Araya

Design of a Compact Spectrometer for High-Flux MeV Gamma-Ray Beams

A novel design for a compact gamma-ray spectrometer is presented. The proposed system allows for spectroscopy of high-flux multi-MeV gamma-ray beams with MeV energy resolution in a compact design. In its basic configuration, the…

Instrumentation and Detectors · Physics 2015-06-19 D. J. Corvan , G. Sarri , M. Zepf