Studies of Charge Collection in GaAs Radiation Detectors

ABSTRACTThe behaviour of the charge collection efficiency of particle detectors fabricated from Semi-Insulating (SI) Liquid Encapsulated Czochralski (LEC) GaAs as a function of applied bias is investigated for alpha particles and it is shown that it cannot be explained by simple models that assume a uniform electric field across the detector. To investigate this the electric field within the SI GaAs has been studied. We have attempted to correlate the measured charge collection efficiency with the observed field distributions. Some correlation is found but other effects may also be present.

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Comparative Studies of Ionizing Radiation Detectors Made on the Basis of Various Types of Diamond Plates

Nano- i Mikrosistemnaya Tehnika ◽

10.17587/nmst.23.68-75 ◽

2021 ◽

Vol 23 (2) ◽

pp. 68-75

Author(s):

Altukhov A.A. ◽

Keyword(s):

Ionizing Radiation ◽

Single Crystal ◽

Comparative Studies ◽

Collection Efficiency ◽

Radiation Detectors ◽

Charge Collection ◽

Alpha Radiation ◽

Charge Collection Efficiency ◽

Polarization Phenomena

The results of experiments on the study of polarization phenomena and the charge collection efficiency in test structures of diamond ionizing radiation detectors using diamond plates of various types, including single-crystal NRNT-type, single-crystal CVD-type, as well as polycrystalline type, when exposed to alpha-radiation with an energy of 5.5 MeV are presented. Studies have demonstrated the existence of a number of problems with the device quality of diamond plates that affect the performance of spec-trometric-type detectors.

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Funneling effect of alpha particles on the charge collection efficiency in N type silicon surface barrier detector

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2014.01.020 ◽

2014 ◽

Vol 325 ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

S. Boorboor ◽

S.A.H. Feghhi ◽

H. Jafari

Keyword(s):

Silicon Surface ◽

Collection Efficiency ◽

Alpha Particles ◽

Charge Collection ◽

Surface Barrier ◽

Surface Barrier Detector ◽

Charge Collection Efficiency ◽

Barrier Detector ◽

Funneling Effect ◽

Silicon Surface Barrier Detector

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Charge Collection Efficiency of 6H-SiC P+N Diodes Degraded by Low-Energy Electron Irradiation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.645-648.921 ◽

2010 ◽

Vol 645-648 ◽

pp. 921-924 ◽

Cited By ~ 6

Author(s):

Naoya Iwamoto ◽

Shinobu Onoda ◽

Takeshi Ohshima ◽

Kazutoshi Kojima ◽

Atsushi Koizumi ◽

...

Keyword(s):

Electron Irradiation ◽

Collection Efficiency ◽

Alpha Particles ◽

Low Energy ◽

Energy Electron ◽

Charge Collection ◽

Charge Collection Efficiency ◽

Before And After ◽

Low Energy Electron

The effect of electron irradiation on the charge collection efficiency of a 6H-SiC p+n diode has been studied. The diodes were irradiated with electrons of energies from 100 keV to 1 MeV. The charge collection efficiencies of the samples were measured for alpha particles before and after the electron irradiation. The electron irradiation at 100 keV does not affect the charge collection efficiency, while the electron irradiation at 200 keV or higher decreases the charge collection efficiency. The degree of the degradation of the diodes correlates with the energy of the electron irradiation.

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Semi-Insulating InP Particle Detectors For X- And γ-Ray Detection

MRS Proceedings ◽

10.1557/proc-487-477 ◽

1997 ◽

Vol 487 ◽

Cited By ~ 5

Author(s):

P. G. Pelfer ◽

F. Dubecký ◽

R. Fomari ◽

M. Pikna ◽

M. Krempaský ◽

...

Keyword(s):

Electrical Properties ◽

Energy Resolution ◽

Collection Efficiency ◽

Charge Collection ◽

Back Contact ◽

X Rays ◽

Particle Detectors ◽

Charge Collection Efficiency ◽

Γ Ray ◽

Α Particles

AbstractA study of electrical properties and detection performances of the semi-insulating (SI) InP based detectors is presented. Detectors with a top P+ layer and a Schottky back contact give the charge collection efficiency about 90 % and an energy resolution 3.7% (FWHM) for 5.48MeV α-particles at 250 K. Detection of X-rays (122 keV and 60 keV) photons in temperature region 220–250 K is demonstrated. Multiple peaking observed during detection of photons is discussed.

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