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31.
Effect of gamma irradiation on Schottky-contacted vertically aligned ZnO nanorod-based hydrogen sensor
Sapana Ranwa, Surendra Singh Barala, Mattia Fanetti, Mahesh Kumar, 2016, izvirni znanstveni članek

Opis: We report the impact of gamma irradiation on the performance of a gold Schottky-contacted ZnO nanorod-based hydrogen sensor. RF-sputtered vertically aligned highly c-axis-oriented ZnO NRs were grown on Si(100) substrate. X-ray diffraction shows no significant change in crystal structure at low gamma doses from 1 to 5 kGy. As gamma irradiation doses increase to 10 kGy, the single crystalline ZnO structure converts to polycrystalline. The photoluminescence spectra also shows suppression of the near-band emission peak and the huge wide-band spectrum indicates the generation of structural defects at high gamma doses. At 1 kGy, the hydrogen sensor response was enhanced from 67% to 77% for 1% hydrogen in pure argon at a 150 °C operating temperature. However, at 10 kGy, the relative response decreases to 33.5%. High gamma irradiation causes displacement damage and defects in ZnO NRs, and as a result, degrades the sensor's performance as a result. Low gamma irradiation doses activate the ZnO NR surface through ionization, which enhances the sensor performance. The relative response of the hydrogen sensor was enhanced by ∼14.9% with respect to pristine ZnO using 1 kGy gamma ray treatment. © 2016 IOP Publishing Ltd.
Najdeno v: ključnih besedah
Ključne besede: ZnO, nanorods, gamma irradiation, sensor
Objavljeno: 12.01.2017; Ogledov: 2372; Prenosov: 0
.pdf Polno besedilo (4,60 MB)

32.
33.
Observations of M31 and M33 with the Fermi Large Area Telescope: A Galactic Center Excess in Andromeda?
Gabrijela Zaharijas, 2017, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ... gamma-rays, Fermi LAT, Andromeda galaxy...
Ključne besede: gamma-rays, Fermi LAT, Andromeda galaxy
Objavljeno: 07.03.2017; Ogledov: 2644; Prenosov: 1
.pdf Polno besedilo (1,35 MB)

34.
Prospects for Cherenkov Telescope Array Observations of the Young Supernova Remnant RX J1713.7−3946
Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, F. Acero, 2017, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ...very-high energy gamma-rays, supernova remnants (SNR), SNR RX J1713.7−3946, Cherenkov Telescope Array...
Ključne besede: very-high energy gamma-rays, supernova remnants (SNR), SNR RX J1713.7−3946, Cherenkov Telescope Array
Objavljeno: 10.05.2017; Ogledov: 2675; Prenosov: 0
.pdf Polno besedilo (997,39 KB)

35.
36.
The Fermi Galactic Center GeV Excess and Implications for Dark Matter
Gabrijela Zaharijas, 2017, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ...– Galaxy: center – Galaxy: halo – gamma rays: general – ISM: general...
Ključne besede: cosmic rays – Galaxy: bulge – Galaxy: center – Galaxy: halo – gamma rays: general – ISM: general
Objavljeno: 13.07.2017; Ogledov: 2306; Prenosov: 0
.pdf Polno besedilo (7,21 MB)

37.
New Frontiers in Black Hole Astrophysics
2017, zbornik recenziranih znanstvenih prispevkov na mednarodni ali tuji konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...astronomy, black holes, active galactic nuclei, gamma ray bursts, tidal disruption events, gravitational waves...
Ključne besede: astronomy, black holes, active galactic nuclei, gamma ray bursts, tidal disruption events, gravitational waves
Objavljeno: 17.08.2017; Ogledov: 2072; Prenosov: 0
.pdf Polno besedilo (106,73 KB)

38.
Polarimetry and Photometry of Gamma-Ray Bursts with RINGO2
Andreja Gomboc, 2017, izvirni znanstveni članek

Najdeno v: ključnih besedah
Ključne besede: astronomy, gamma ray bursts, polarisation
Objavljeno: 17.08.2017; Ogledov: 1888; Prenosov: 0
.pdf Polno besedilo (1,65 MB)

39.
Ricerca di segnali di decadimento di materia oscura nell'emissione gamma isotropa rilevata dall'esperimento Fermi-LAT
Valentina Buran, magistrsko delo

Najdeno v: ključnih besedah
Ključne besede: gamma rays
Objavljeno: 28.08.2017; Ogledov: 2114; Prenosov: 0
.pdf Polno besedilo (11,36 MB)

40.
Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A
Jagdish Joshi, Marlui Miranda, Lili Yang, Soebur Razzaque, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: The association of at least a dozen ultrahigh-energy cosmic-ray (UHECR) events with energy 54 EeV or higher detected by the Pierre Auger Observatory from the direction of Centaurus-A, the nearest radio galaxy, supports the scenario of UHECR acceleration in the jets of radio galaxies. Multiwavelength observations of Centaurus-A suggest that the inner jet is likely the site for particle acceleration, which emits in X-ray to very high-energy (VHE) gamma-ray. We model broadband spectral energy distribution with emission from shock-accelerated electrons and protons in a combined synchrotron-self-Compton and photo-hadronic scenario. The UHECR flux from Centaurus-A, required to explain Pierre Auger data, successfully explains observed VHE gamma rays as photo-hadronic emission.
Najdeno v: ključnih besedah
Ključne besede: Centaurus A, gamma ray, cosmic rays
Objavljeno: 17.01.2018; Ogledov: 1692; Prenosov: 0
.pdf Polno besedilo (2,27 MB)

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