Studying the properties and response of a large volume (946 cm3) LaBr3:Ce detector with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0011.gif" overflow="scroll"><mml:mi mathvariant="normal">γ</mml:mi><mml:mi mathvariant="normal">-</mml:mi><mml:mi>rays</mml:mi></mml:math> up to 22.5 MeV

Mazumdar, I.; Gothe, D.A.; Kumar, G. Anil; Yadav, Nitin; Chavan, P.B.; Patel, Sachin

doi:10.1016/j.nima.2012.12.093

Cited by 27 publications

(11 citation statements)

References 21 publications

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“…LaBr 3 :Ce detectors is very satisfactory for high energy c-ray measurements. 9 LaBr 3 :Ce has also a potential for the use in scintillation cameras for X-ray and c-ray imaging. 10 For the majority of the mentioned applications, the energy resolution is a very important parameter, and its further improvement will be very beneficial.…”

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confidence: 99%

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Alekhin

Biner

Krämer

et al. 2013

Journal of Applied Physics

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This paper reports on the effects of Li þ , Na þ , Mg 2þ , Ca 2þ , Sr 2þ , and Ba 2þ co-doping on the scintillation properties of LaBr 3 :5%Ce 3þ . Pulse-height spectra of various gamma and X-ray sources with energies from 8 keV to 1.33 MeV were measured from which the values of light yield and energy resolution were derived. Sr 2þ and Ca 2þ co-doped crystals showed excellent energy resolution as compared to standard LaBr 3 :Ce. The proportionality of the scintillation response to gamma and X-rays of Ca 2þ , Sr 2þ , and Ba 2þ co-doped samples also considerably improves. The effects of the co-dopants on emission spectra, decay time, and temperature stability of the light yield were studied. Multiple thermoluminescence glow peaks, decrease of the light yield at temperatures below 295 K, and additional long scintillation decay components were observed and related to charge carrier traps appearing in LaBr 3 :Ce 3þ with Ca 2þ , Sr 2þ , and Ba 2þ co-doping.

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confidence: 99%

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Alekhin

Biner

Krämer

et al. 2013

Journal of Applied Physics

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“…We have embarked upon a programme to carry out in-depth studies in selected problems relevant to nuclear structure and nuclear astrophysics. Here, we report on two recent measurements, namely, inelastic scattering of protons on 12 C and radiative proton capture of deuteron to produce 3 He. There are many compelling reasons to revisit the 12 C(p, p γ) 12 C reaction.…”

Section: Introductionmentioning

confidence: 99%

“…The radiative capture of proton on deuteron d(p, γ) 3 He is a reaction of great importance both for nuclear astrophysics and few-body nuclear physics. As far as the nucleosynthesis of 3 He is concerned, the relevant beam energy varies from few keV to few hundred keV.…”

Section: Introductionmentioning

confidence: 99%

“…Broadly, one can consider three scenarios for the production of 3 He (or depletion of deuteron) from d(p, γ) 3 He reaction, namely, the Big Bang Nucleosynthesis (BBN), production in low-mass protostars, and production in low to medium mass stars like the Sun. The prevalent temperature in BBN (10 9 K) translates to a beam energy of around few hundred keV for the d(p, γ) 3 He reaction. The LUNA experiment [1] has provided high quality data for cross sections and astrophysical S-factors from 2.5 to 22 keV (CM), essentially covering the region of interest in stellar environment.…”

Section: Introductionmentioning

confidence: 99%

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Studies in Nuclear Structure and Big Bang Nucleosynthesis Using Proton Beams

Mazumdar¹,

Dhibar²,

Weppner³

et al. 2019

Acta Phys. Pol. B

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We present the results of our measurements using proton beams to address two different problems, namely, inelastic scattering of proton by 12 C and radiative capture of proton by deuteron. The 12 C(p, p γ) 12 C reaction was carried out with proton-beam energies ranging from 8 to 22 MeV. The differential and total cross section of γ rays from the 4.438, 9.64, 12.7 and 15.1 MeV states were measured at all the beam energies and compared with detailed Optical Model calculations. We report, for the first time, the cross section and the branching ratio of the 9.64 MeV state. In a different experiment, cross sections and astrophysical S(E) factors for p + d capture reaction were measured for the first time at CM energies of 66, 116 and 166 keV. The measured values at these three new energies are found to be in good agreement with global set of data and in nice agreement with recent theoretical calculations.

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“…It has a very high light yield [61000 photons/MeV (21)] with a minor non-linearity of 6% between 60 and 1275 keV (4, 17). The material density [5.06 g/cm 3 (4)] and effective atomic number [Z eff = 46.9 (10)], result in a high stopping efficiency. Moreover, this detector provides an excellent energy resolution from low photon energies [~3% at 662 keV (21)] up to high energies, thus keeping the ability to resolve the full energy peak from escape peaks over a wide energy range up to about 25 MeV (3).…”

Section: Introductionmentioning

confidence: 99%

Comparative Characterization Study of a LaBr3(Ce) Scintillation Crystal in Two Surface Wrapping Scenarios: Absorptive and Reflective

et al. 2015

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The properties of a 50 mm × 50 mm × 30 mm monolithic LaBr3:Ce scintillator crystal coupled to a position-sensitive multi-anode photomultiplier (PMT, Hamamatsu H9500), representing the absorbing detector of a Compton camera under study for online ion (proton) beam range verification in hadron therapy, was evaluated in combination with either absorptive or reflective crystal surface coating. This study covered an assessment of the energy and position-dependent energy resolution, exhibiting a factor of 2.5–3.5 improvement for the reflectively wrapped crystal at 662 keV. The spatial dependency was investigated using a collimated 137Cs source, showing a steep degradation of the energy resolution at the edges and corners of the absorptively wrapped crystal. Furthermore, the time resolution was determined to be 273 ps (FWHM) and 536 ps (FWHM) with reflective and absorptive coating, respectively, using a 60Co source. In contrast, the light spread function (LSF) of the light amplitude distribution on the PMT segments improved for the absorptively wrapped detector. Both wrapping modalities showed almost no differences in the energy-dependent photopeak detection efficiency.

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Studying the properties and response of a large volume (946 cm3) LaBr3:Ce detector with γ-rays up to 22.5 MeV

Cited by 27 publications

References 21 publications

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Studies in Nuclear Structure and Big Bang Nucleosynthesis Using Proton Beams

Comparative Characterization Study of a LaBr3(Ce) Scintillation Crystal in Two Surface Wrapping Scenarios: Absorptive and Reflective

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