Fast Diamond Photoconductors

1993 ◽  
Vol 302 ◽  
Author(s):  
T. Pochet ◽  
B. Brullot ◽  
R. Galli ◽  
C. Rubbelynck
Keyword(s):  
Light Intensity ◽  
Laser Pulse ◽  
Gamma Ray ◽  
Applied Bias ◽  
Preliminary Results ◽  
Detector Sensitivity

ABSTRACTPreliminary results on the response of type Ib and IIa diamond photodetectors to fast laser pulse exposures at 265 and 530 nm are presented. The influence of the applied bias, the laser wavelengths and the light intensity on the detector sensitivity is studied. Also, recent measurements with 1.25 MeV gamma ray pulses are reported.

Observations of the galactic center with the GSFC Low-Energy Gamma-Ray Spectrometer: Preliminary results

1982 ◽  
Author(s):  
W. S. Paciesas ◽  
T. L. Cline ◽  
B. J. Teegarden ◽  
J. Tueller ◽  
P. Durouchoux ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Galactic Center ◽  
Low Energy ◽  
Preliminary Results ◽  
Gamma Ray Spectrometer ◽  
Energy Gamma

scholarly journals Optical Variability Monitoring for Gamma ray Blazars: preliminary results

2009 ◽  
Author(s):  
Jorge Ariel Combi ◽  
Ileana Andruchow ◽  
Sergio Aldo Cellone ◽  
Gustavo E. Romero ◽  
Josep Martí ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Optical Variability ◽  
Preliminary Results

FIRST RESULTS WITH THE RISING ACTIVE STOPPER

2008 ◽  
Vol 17 (supp01) ◽  
pp. 8-20 ◽  
Author(s):  
P. H. REGAN ◽  
N. ALKHOMASHI ◽  
N. AL-DAHAN ◽  
Zs. PODOLYÁK ◽  
S. B. PIETRI ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Spectroscopic Studies ◽  
Ground State Structure ◽  
Energy Response ◽  
Axially Symmetric ◽  
Beta Particles ◽  
Preliminary Results ◽  
Hartree Fock ◽  
First Results ◽  
Beta Delayed

This paper outlines some of the physics opportunities available with the GSI RISING active stopper and presents preliminary results from an experiment aimed at performing beta-delayed gamma-ray spectroscopic studies in heavy-neutron-rich nuclei produced following the projectile fragmentation of a 1 GeV per nucleon 208 Pb primary beam. The energy response of the silicon active stopping detector for both heavy secondary fragments and beta-particles is demonstrated and preliminary results on the decays of neutron-rich Tantalum ( Ta ) to Tungsten ( W ) isotopes are presented as examples of the potential of this technique to allow new structural studies in hitherto experimentally unreachable heavy, neutron-rich nuclei. The resulting spectral information inferred from excited states in the tungsten daughter nuclei are compared with results from axially symmetric Hartree–Fock calculations of the nuclear shape and suggest a change in ground state structure for the N = 116 isotone 190 W compared to the lighter isotopes of this element.

scholarly journals Preliminary results from the 1999 balloon flight of the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT)

2000 ◽  
Author(s):  
Elena Aprile ◽  
Uwe G. Oberlack ◽  
Alessandro Curioni ◽  
Valeri Egorov ◽  
Karl-Ludwig Giboni ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Liquid Xenon ◽  
Balloon Flight ◽  
Preliminary Results ◽  
Imaging Telescope ◽  
Gamma Ray Imaging

The Experimental Study of Lanthanum Bromide Detector in the Gamma Ray Imaging

2013 ◽  
Vol 336-338 ◽  
pp. 373-378
Author(s):  
Cui Lan Zhao ◽  
Yong Ping Li ◽  
Li Hong Chen ◽  
Chao Yuan ◽  
Yu Jin Qi
Keyword(s):  
Gamma Ray ◽  
High Sensitivity ◽  
Effective Field ◽  
Detector Module ◽  
Preliminary Results ◽  
Lanthanum Bromide ◽  
Imaging Detector ◽  
Gamma Ray Imaging ◽  
Position Sensitive Photomultiplier Tube ◽  
Scintillator Crystal

Cerium activated lanthanum bromide (LaBr3:Ce3+) scintillator crystal has shown very promising characteristics for high-resolution and high-sensitivity gamma ray imaging and spectrometric applications [1,2,. In this paper, we present some preliminary results of a compact gamma camera based on LaBr3:Ce3+ crystal. The detector module consists of a continuous LaBr3:Ce3+ crystal with a sensitive area of 50x50 mm2 and 5mm thickness coupling to a Hamamatsu H8500 position-sensitive photomultiplier tube (PSPMT). A compact multiplexed readout based on symmetric charge division circuit (SCD) was developed to reduce the 64 anode signal to 16 readout channels, and a resistive division network to reduce the readout channels from 16 to 4. The performance of the imaging detector module was tested using a 57Co source. The preliminary results showed that this detector module can achieve an effective field-of-view (FOV) of ~39x39 mm2 with a good intrinsic spatial resolution around 1.5mm and energy resolution of 9.2% at 122 keV.

scholarly journals AI gamma-ray burst classification: Methodology/preliminary results

1998 ◽  
Author(s):  
Jon Hakkila ◽  
David J. Haglin ◽  
Richard J. Roiger ◽  
Robert S. Mallozzi ◽  
Geoffrey N. Pendleton ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Burst ◽  
Preliminary Results

ON THE PRODUCTION OF HIGH-ENERGY NEUTRINOS IN GAMMA-RAY BURSTS

2014 ◽  
Vol 28 ◽  
pp. 1460207
Author(s):  
MATIAS M. REYNOSO
Keyword(s):  
Energy Loss ◽  
Gamma Ray ◽  
Neutrino Flux ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Proton Proton ◽  
Preliminary Results ◽  
Acceleration Zone ◽  
High Energy Neutrinos

We present preliminary results of a model with two zones in order to study the production of high energy neutrinos at the prompt phase of gamma-ray bursts (GRB). We consider an acceleration zone, where protons and electrons are injected and accelerated, being subject to synchrotron, proton-proton, and proton-gamma cooling. We also assume that they can escape from this zone at a certain rate. The produced pions and the decaying muons are also subject to energy loss and gain processes within the acceleration zone, and the escaping ones are re-injected in a second zone where acceleration no longer operates. We compute the neutrino output expected from both of these zones using typical GRB parameters, and integrate in the redshift to obtain a diffuse neutrino flux which can be different from the expected within one-zone models.

Lunar Surface Radioactivity: Preliminary Results of the Apollo 15 and Apollo 16 Gamma-Ray Spectrometer Experiments

Science ◽  
1973 ◽  
Vol 179 (4075) ◽  
pp. 800-803 ◽  
Author(s):  
A. E. Metzger ◽  
J. I. Trombka ◽  
L. E. Peterson ◽  
R. C. Reedy ◽  
J. R. Arnold
Keyword(s):  
Lunar Surface ◽  
Gamma Ray ◽  
Preliminary Results ◽  
Gamma Ray Spectrometer
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