Determination of 4.438MeV γ-ray to neutron emission ratio from a 241Am–9Be neutron source

Mowlavi, Ali Asghar; Koohi-Fayegh, R.

doi:10.1016/j.apradiso.2004.02.008

Cited by 49 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 4.4 MeV peak of Be-based neutron generators can often be used to discriminate these sources from fission sources. The yield of the 4.4 MeV photon per neutron emission is 0.60 [10]. This photon emission also explains the higher absolute efficiency of the NaI portal monitor with the AmBe source as compared to the 252 Cf source.…”

Section: Detection Efficiencymentioning

confidence: 76%

Neutron detection with a NaI spectrometer using high-energy photons

Holm

Perajärvi

Sihvonen

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

Section: Detection Efficiencymentioning

confidence: 76%

Neutron detection with a NaI spectrometer using high-energy photons

Holm

Perajärvi

Sihvonen

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

“…These particles are produced via 9 Be(α, n) 12 C reactions, where the α particle is created in radioactive decays of 241 Am. In about 60 % of the cases, the carbon nucleus is produced in an excited state, and emits a 4.4 MeV gamma in addition to the neutron [53]. To get a background-free neutron capture sample, this high energy gamma is used to do a delayed coincidence search with the neutron capture.…”

Section: Delayed Neutron Detection Efficiencymentioning

confidence: 99%

Sterile Neutrino Constraints from the STEREO Experiment with 66 Days of Reactor-On Data

Almazán¹,

Sanchez²,

Bernard³

et al. 2018

Phys. Rev. Lett.

101

View full text Add to dashboard Cite

The Stereo experiment is a very short baseline reactor antineutrino experiment. It is designed to test the hypothesis of light sterile neutrinos being the cause of a deficit of the observed antineutrino interaction rate at short baselines with respect to the predicted rate, known as the Reactor Antineutrino Anomaly. The Stereo experiment measures the antineutrino energy spectrum in six identical detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this article, results from 179 days of reactor turned on and 235 days of reactor turned off are reported in unprecedented detail. The current results include improvements in the description of the optical model of the detector, the gamma-cascade after neutron captures by gadolinium, the treatment of backgrounds, and the statistical method of the oscillation analysis. Using a direct comparison between antineutrino interaction rates of all cells, independent of any flux prediction, we find the data compatible with the null oscillation hypothesis. The best-fit point of the Reactor Antineutrino Anomaly is rejected at more than 99.9 % C.L.

show abstract

“…Conversely, the main drawback of 241 Am-Be source is its relative high gamma background due to 4.43 MeV [12] emitted by 12 C, product of the reaction (a, n) on Beryllium. For the prototype developed in this work, a second component of the background of less importance, which must be taken into account, is due to 2.23 MeV prompt gamma emitted during hydrogen neutron capture.…”

Section: Introductionmentioning

confidence: 97%