Characterization of 3D thermal neutron semiconductor detectors

Uher, J.; Fröjdh, Christer; Jakůbek, J.; Kenney, Crystal; Kohout, Z.; Linhart, V.; Parker, S. I.; Petersson, S.; Pospı́šil, S.; Thungström, Göran

doi:10.1016/j.nima.2007.01.115

Cited by 63 publications

(31 citation statements)

References 3 publications

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“…The macroscopic cross section of 6 LiF (enriched in 6 Li at 95% as it is our case) for thermal neutron capture is 57 cm −1 , which for our converters 1.8 m and 1.5 m thick corresponds to intrinsic efficiency 02002-p. 3 of respectively ≈1% and ≈0.85%. In case of two identical 1.8 m converters the intrinsic efficiency would be 2%.…”

Section: A Silicon Pad For Neutron Detectionmentioning

confidence: 66%

“…The dependence of the spectrum shape on the converter thickness has been observed in several papers [3][4][5][6][7] where it is evident that a thinner film ensures a better separation between the reaction products and the background, although the detection efficiency becomes smaller.…”

Section: A Silicon Pad For Neutron Detectionmentioning

confidence: 99%

“…Figure 1. Sketch of a thermal neutron detector consisting of a double-sided silicon detector coupled with two 6 LiF neutron converters. For test purposes two different substrates were used: plastic and glass.…”

Section: Introductionmentioning

confidence: 99%

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HELNED: Helium-3-free low-cost neutron detectors

Barbagallo

Coséntino

Marchetta

et al. 2014

EPJ Web of Conferences

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Abstract. We developed a technique for thermal neutron detection not making use of 3 He, also suitable for online real time monitoring of CASTOR spent fuel containers. As a neutron converter we used 6 LiF, being the neutron capture cross section of 6 Li very well known and with only an alpha and a triton in the exit channel. We can deposit thin layers of converter onto several different substrates, to be placed on top of solid state detectors or scintillators capable of efficiently detecting the decay products.

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Section: A Silicon Pad For Neutron Detectionmentioning

confidence: 66%

Section: A Silicon Pad For Neutron Detectionmentioning

confidence: 99%

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HELNED: Helium-3-free low-cost neutron detectors

Barbagallo

Coséntino

Marchetta

et al. 2014

EPJ Web of Conferences

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“…The emitted light at 600 nm wavelength was used for the detection of neutrons [18]. The Czech Technical University in Prague (Czech Republic) reported thermal neutron test results of detectors fabricated with pyramidal dips on the surface and covered with 6 LiF [19]. The reported efficiency was of 6.3% for a single layer compared the 4.90% obtained with a reference planar detector.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor neutron detectors

Mendicino¹,

Betta²,

Boscardin³

et al. 2015

Proceedings of 24th International Workshop on Vertex Detectors — PoS(VERTEX2015)

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Semiconductor neutron detectors are attracting increasing interest in many application fields, due to the shortage and high cost of 3 He gas which represented for decades the most important solution to neutron detection. The most interesting devices consist of silicon sensors featuring high aspect-ratio cavities filled with neutron converter materials (typically based on 10 B or 6 Li). Very good results have so far been obtained by different research groups in Europe, but most of all in the USA, with efficiency values up to 50% using only a single detector layer. In this paper, the state of the art in semiconductor neutron detectors will be reviewed, with emphasis on silicon based devices. Moreover, recent results from the R&D activity carried out in the framework of the INFN HYDE (HYbrid DEtector for neutrons) Project will be reported, covering design and technological aspects, as well as simulation results relevant to a new pixel sensor structure, aimed at high detection efficiency while minimizing the process complexity.

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“…The two nuclear species commonly considered suitable neutron converters are 6 Li (natural abundance ≈7%, thermal neutron cross section ≈940b) and 10 B (natural abundance ≈20%, thermal neutron cross section ≈3840b). The corresponding neutron capture reactions involved are:…”

Section: Introductionmentioning

confidence: 99%