Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of low-energy X-rays with 1/2 and 1 inch LaBr3:Ce crystals
  read by SIPM arrays   LaBr3:Ce crystals, with photomultiplier or single SiPM readout (up to 3x3
mm$^2$) have been introduced for radiation imaging in medical physics. An R&D
was pursued with 1/2" and 1" LaBr3:Ce crystals, from different producers, to
realize compact large area detectors (up to some cm $^2$ area) with SiPM array
readout, aiming at high light yields, good energy resolution,good detector
linearity and fast time response for low-energy X-rays. The study was triggered
by the FAMU experiment at the RIKEN-RAL muon facility, aiming at a precise
measurement of the proton Zemach radius to solve the so-called "proton radius
puzzle". The goal is the detection of characteristic X-rays around 130 KeV.
Other applications may be foreseen for homeland security and $\gamma$-ray
astronomy. Results were obtained with a direct readout based on a CAEN V1730
FADC, with no need for an amplification stage. At the Cs$^{137}$ peak, energy
resolutions up to $\sim 3 \%$ were obtained, using a readout with Hamamatsu
SiPM arrays. These results compare well with best available results obtained
with a PMT readout.

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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: quant-ph