Results 11 to 20 of about 4,053,623 (330)

Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A [PDF]

open access: yes, 2017
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB 170817A was observed independently by the Fermi Gamma-ray Burst Monitor, and the Anticoincidence Shield for ...
B. Abbott   +499 more
semanticscholar   +1 more source

Precision imaging of 4.4 MeV gamma rays using a 3-D position sensitive Compton camera [PDF]

open access: yesScientific Reports, 2018
Imaging of nuclear gamma-ray lines in the 1–10 MeV range is far from being established in both medical and physical applications. In proton therapy, 4.4 MeV gamma rays are emitted from the excited nucleus of either 12C* or 11B* and are considered good ...
A. Koide   +10 more
semanticscholar   +1 more source

On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region [PDF]

open access: yes, 2018
The gamma-ray emission in broad-line blazars is generally explained as inverse Compton (IC) radiation of relativistic electrons in the jet scattering optical-UV photons from the Broad Line Region (BLR), the so-called BLR External Compton scenario.
L. Costamante   +6 more
semanticscholar   +1 more source

Indirect dark matter searches in gamma and cosmic rays [PDF]

open access: yesNature Physics, 2017
Dark matter candidates such as weakly interacting massive particles are predicted to annihilate or decay into Standard Model particles, leaving behind distinctive signatures in gamma rays, neutrinos, positrons, antiprotons, or even antinuclei.
J. Conrad, O. Reimer
semanticscholar   +1 more source

The ALPACA experiment: The project of the first sub-PeV gamma-ray observation in the southern sky

open access: yesSciPost Physics Proceedings, 2023
The ALPACA experiment is a project aiming to observe sub-PeV gamma rays for the first time in the southern hemisphere. The main goal of ALPACA is to identify PeVatrons, the accelerators of Galactic PeV cosmic rays, by observing sub-PeV pion-decay gamma ...
Teruyoshi Kawashima for the ALPACA Collaboration
doaj   +1 more source

Gamma-rays from Heavy Minimal Dark Matter [PDF]

open access: yes, 2015
Motivated by the Minimal Dark Matter scenario, we consider the annihilation into gamma rays of candidates in the fermionic 5-plet and scalar 7-plet representations of SU(2)L, taking into account both the Sommerfeld effect and the internal bremsstrahlung.
C. Garcia-Cely   +3 more
semanticscholar   +1 more source

The Neutron-Gamma Pulse Shape Discrimination of CLLB Detector [PDF]

open access: yesEPJ Web of Conferences
Cs2LiLaBr6: Ce (CLLB) scintillator with the size of Φ 21mm × 25 mm coupled with PMT was used to detect neutron and gamma rays. The pulse shape discrimination (PSD) of neutrons and gamma rays by charge comparison method, the neutrons and gamma rays from ...
Song Ruiqiang   +6 more
doaj   +1 more source

Assessment of mutagenic sensitivity in blackgram variety CO 6

open access: yesElectronic Journal of Plant Breeding, 2021
The present study was conducted to examine the mutagenic effect of 60Co gamma rays and a combination of 60Co gamma rays with EMS in blackgram variety CO 6. Based on the LD50 dose, the seeds were treated with three different doses of gamma rays (200, 300,
M. Tamilzharasi1, D. Kumaresan1*, V. Thiruvengadam2, J. Souframanian3 and P. Jayamani4
doaj   +1 more source

GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE [PDF]

open access: yes, 2015
Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe.
A. Abeysekara   +105 more
semanticscholar   +1 more source

An imaging neutron/gamma-ray spectrometer [PDF]

open access: yes, 2013
We present the test results of a neutron/gamma-ray imaging spectrometer for the identification and location of radioactive and special nuclear materials. Radioactive materials that could be fashioned into a radiation dispersal device typically emit gamma
Bloser, Peter F.   +8 more
core   +2 more sources

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