Demonstration of a Dual-Range Photon Detector With SDD and ${\hbox {LaBr}}_{3}({\hbox {Ce}}^{3+})$ Scintillator

Pausch, G.; Plettner, C.; Herbach, Claus-Michael; Stein, J.; Moszyński, M.; Nassalski, A.; Świderski, Ł.; Szczesniak, T.; Niculae, A.; Soltau, H.

doi:10.1109/tns.2008.2003254

Cited by 10 publications

(7 citation statements)

References 21 publications

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“…All measurements were performed at room temperature (23-25 C) with a 6 mm in diameter and 6 mm high LaBr crystal, no 3416, tested earlier in [12]. Details of the crystal assembling on the SDD are given in [16].…”

Section: Methodsmentioning

confidence: 99%

A Comparative Study of Silicon Drift Detectors With Photomultipliers, Avalanche Photodiodes and PIN Photodiodes in Gamma Spectrometry With LaBr$_{3}$ Crystals

Moszyński¹,

Plettner²,

Nassalski³

et al. 2009

IEEE Trans. Nucl. Sci.

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The performance of a silicon drift detector (SDD) with an integrated FET, delivered by the company PNSensor, Munich, Germany, was studied in gamma spectrometry at room temperature (23-25 C) with a LaBr 3 :Ce crystal of 6 mm diameter and 6 mm height. The SDD characteristics were compared with those measured with a Photonis XP5212 photomultiplier, a Large Area Avalanche Photodiode (LAAPD) of Advanced Photonix, Inc., and a Hamamatsu S3590-18 Photodiode (PD). Energy resolution versus gamma ray energies and its components related to the photoelectron/electron-hole pair statistics and dark noise were measured and compared. At low energies, below 100 keV, the light readout by the photomultiplier gives the best results, while for high energies, above 300 keV, the light readout by the SDD delivers superior energy resolution. In particular, the best energy resolution of 2.7% was determined for 662 keV gamma rays from a 137 Cs source.

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Section: Methodsmentioning

confidence: 99%

A Comparative Study of Silicon Drift Detectors With Photomultipliers, Avalanche Photodiodes and PIN Photodiodes in Gamma Spectrometry With LaBr$_{3}$ Crystals

Moszyński¹,

Plettner²,

Nassalski³

et al. 2009

IEEE Trans. Nucl. Sci.

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“…Bipolar shaping was used. More details on the signal shaping, ballistic deficit and temperature effects can be found in Ret: [4]. The silicon drift detectors with an active area of 30 mm 2 were purchased from PNSensor.…”

Section: Characteristics Of the Experimental Detection Systemsmentioning

confidence: 99%

“…the pulse height per keY of absorbed gamma energy depends on the detection mode. The factor distinguishing the pulse heights of signals corresponding to the same gamma energy but different detection mode is approximately 7Re£ [4] with the actual detector configuration. The two spectra represent the two complementary detection modes provided by the compact detector configuration, which is operated at room temperature and coupled to a single electronics channel.…”

Section: - --------mentioning

confidence: 99%

“…Commercial devices employ the state-of-the-art scintillators, as LaBr3(Ce) [3], or semiconductor detectors, as CdTeZn. To pursue an energy resolution which outranks that of a LaBr3Ce scintillator coupled with a photomultiplier, a new detector system was proposed [4]. The actual detector is a combination of a LaBr3Ce crystal with a silicon drift detector (SDD).…”

Section: Introductionmentioning

confidence: 99%

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Prospects of a dual range photon detector with SDD and LaBr<inf>3</inf>(Ce) scintillator

Plettner¹,

Pausch²,

Herbach³

et al. 2008

2008 IEEE Nuclear Science Symposium Conference Record

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The investigated dual-range photon detector consists of an SDD which is optically coupled with a lanthanum bromide crystal. In contrast to similar configurations investigated by Fiorini et al. [6], the SDD side, not the scintillator side, points to the radiation source. Low-energy gammas or X rays are therefore absorbed in the bulk silicon and the SDD acts as a high-resolution detector on its own (Figure 1, left). siswitch detectors operate on this basis [CsI(TI) scintillator plus photodiode) [7], as well the dual-range photon detectors with CsI(TI) scintillators and photodiode [8] or SDD readout [9]. The proposed detector configuration combines for the first time a fast scintillator and a slow silicon detector. However, the pulse shape discrimination is successfully applied due to the long time required to collect the charge in the SDD, when the charge carriers are formed opposite to the anode (geometry effect). t Fig. 1: Scheme of the dual-range photon detector (DRPD) and illustration of the underlying detection modes. Low-energy gammas or X rays are absorbed in the SDD (l). The absorption process generates a local cloud of charge carriers. Electrons drift towards the anode (drift time to). The anode (A) signal is delayed just by to but shows a steep rise if the electron cloud arrives at the anode. Energetic gamma radiation mostly passes the SDD but might be absorbed in the scintillator (2).The SDD detects scintillation light. Photoelectrons are generated along the crystal-SDD contact zone. The superposition of contributions representing different drift paths and drift times results in a shallow anode signal. Pulse shape discrimination (PSD) separates the distinct detection mechanisms.This process is referred as to direct detection (SDD mode). More energetic radiation mostly passes the silicon layer but may be absorbed in the scintillator.The SDD then acts as an efficient photo detector for the scintillation light of those events. The scintillation flash illuminates the full contact area of SDD and crystal. The '1 (2) A '1 (1) qr toC, Abstract-Homeland security applications demand compact, high resolution detectors for gamma and X rays identification. Most commercial instruments use scintillating crystals or CdZnTe detectors. The identification performance is therefore intrinsically linked with the progress in developing crystals with a very high light output (LaBr3Ce or SrI 2 ) and with the manufacturing of the CdZnTe detectors. A new detector concept is proposed, which essentially improves on the existing resolution limits. It combines two distinct detection mechanisms in a compact, state-of-the-art solid-state detector, providing complementary information in different but overlapping energy ranges. The dual-range detector consists of a LaBr3(Ce3+) scintillator coupled to a silicon drift detector (SDD). The SDD serves as a high-resolution X-rayon its own, and in parallel as a light readout device for the LaBr3(Ce31 scintillator ensuring best possible resolution at higher energies.

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“…This feature allows reaching a low electronics noise, making it an ideal device for X-ray spectroscopy applications [2], but also a competitive device for scintillator readout representing a valid alternative to conventional photomultiplier tube (PMT) [3][4][5][6][7]. SDDs show high quantum efficiency and a low intrinsic electronics noise.…”

Section: Introductionmentioning

confidence: 99%

New development of Silicon Drift Detectors for gamma-ray spectroscopy

Fiorini

Bombelli

Busca

et al. 2012

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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In this work, we report on a new development of Silicon Drift Detectors (SDDs) for gamma-ray spectroscopy for astronomy applications, within a research project supported by the European Space Agency. The final goal of the development is the realization of monolithic arrays of SDDs which will be assembled to readout large (2″×2″ and 3″×3″) LaBr3 scintillators. We report on the development of a new single SDD prototype, with 8×8 mm2 active area, produced at FBK semiconductor laboratories. For the readout of the SDD signals,we have adopted a CMOS charge preamplifier (CUBE) recently developed at Politecnico di Milano. This preamplifier has allowed to achieve state-of-the-art noise performance using a relatively standard SDD technology process. A quantum efficiency of about 80% has been measured on the SDD at the emission wavelengths of LaBr3 (360–380 nm). In first experimental measurements irradiating the SDD, without scintillator, with a 55Fe source we achieved an energy resolution of 140eV and 129eV, respectively, at −20°C and −43°C. By coupling the SDD with a LaBr3 scintillator (9mm diameter), we have measured an energy resolution of 5.6% FWHM and 2.6% FWHM respectively at 122keV and 662keV

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Demonstration of a Dual-Range Photon Detector With SDD and ${\hbox {LaBr}}_{3}({\hbox {Ce}}^{3+})$ Scintillator

Cited by 10 publications

References 21 publications

A Comparative Study of Silicon Drift Detectors With Photomultipliers, Avalanche Photodiodes and PIN Photodiodes in Gamma Spectrometry With LaBr$_{3}$ Crystals

A Comparative Study of Silicon Drift Detectors With Photomultipliers, Avalanche Photodiodes and PIN Photodiodes in Gamma Spectrometry With LaBr$_{3}$ Crystals

Prospects of a dual range photon detector with SDD and LaBr<inf>3</inf>(Ce) scintillator

New development of Silicon Drift Detectors for gamma-ray spectroscopy

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