High resolution measurements of neutron energy spectra from AmBe and AmB neutron sources

Marsh, J. Wallis; Thomas, David J.; Burke, M.G.

doi:10.1016/0168-9002(95)00613-3

Cited by 97 publications

(42 citation statements)

References 20 publications

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“…This is significant, since the neutron spectrum from an Am-Be source is somewhat uncertain below a few hundred keV, although this is especially so for stronger sources than the one used here [38]. The 252 Cf fission spectrum, which is known more precisely, yields very similar results.…”

Section: Birks Factor K Bsupporting

confidence: 68%

Quenching factor for low-energy nuclear recoils in a plastic scintillator

et al. 2012

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Plastic scintillators are widely used in industry, medicine, and scientific research, including nuclear and particle physics. Although one of their most common applications is in neutron detection, experimental data on their response to low-energy nuclear recoils are scarce. Here, the relative scintillation efficiency for neutroninduced nuclear recoils in a polystyrene-based plastic scintillator (UPS-923A) is presented, exploring recoil energies between 125 and 850 keV. Monte Carlo simulations, incorporating light collection efficiency and energy resolution effects, are used to generate neutron scattering spectra which are matched to observed distributions of scintillation signals to parameterize the energy-dependent quenching factor. At energies above 300 keV the dependence is reasonably described using the semiempirical formulation of Birks and a kB factor of (0.014 ± 0.002) g MeV −1 cm −2 has been determined. Below that energy, the measured quenching factor falls more steeply than predicted by the Birks formalism.

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Section: Birks Factor K Bsupporting

confidence: 68%

Quenching factor for low-energy nuclear recoils in a plastic scintillator

et al. 2012

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“…These arise from an assumed ±10% uncertainty in the single electron calibration (left bar), and from uncertainty below 2 MeV in the spectrum of initial neutron energies E n from the AmBe neutron source [12] (right bar). The neutron energy spectrum was taken from Fig.…”

Section: Pos(idm2010)017mentioning

confidence: 99%

“…The neutron energy spectrum was taken from Fig. 5 of [12], and the uncertainty was parameterized as 1 ± exp(−E n − 1 2 ) for E n < 2 MeV. The effect of this conservative assumption on the Monte Carlo nuclear recoil energy spectrum was a change of about ±15% in bin counts at 1 keVr.…”

Section: Pos(idm2010)017mentioning

confidence: 99%

Lowering the low-energy threshold of xenon-based detectors

Sørensen¹

2011

Proceedings of Identification of Dark Matter 2010 — PoS(IDM2010)

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We show that the energy threshold for nuclear recoils in the XENON10 dark matter search data can be lowered to ∼ 1 keV, by using only the ionization signal. In other words, we make no requirement that a valid event contain a primary scintillation signal. We therefore relinquish incident particle type discrimination, which is based on the ratio of ionization to scintillation in liquid xenon. This method compromises the detector's ability to precisely determine the z coordinate of a particle interaction. However, we show for the first time that it is possible to discriminate bulk events from surface events based solely on the ionization signal.

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“…The neutron source employed is an AmBe producing 1.6·10 6 neutrons/s, and when needed it was inserted into the hole (b) of Figure 4. The polyethylene is needed in order to soften the original neutron spectrum from the source, that extends up to 10 MeV, towards lower energy [13]. This process needs an average number of 19-20 collisions (in polyethylene, CH 2 ), corresponding to a linear path of the order of ≈20 cm for a complete thermalization.…”

Section: The Test Setupmentioning

confidence: 99%

Characterization of the silicon+6LiF thermal neutron detection technique

Pappalardo

Barbagallo

Coséntino

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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The worldwide need to replace 3 He for the neutron detection has triggered R&D on new technologies and methods. A promising one is based on commercial solid state silicon detectors coupled with thin neutron converter layers containing 6 Li. After proving the feasibility of this technique, we characterized the behavior of such a detector with different converter layer thicknesses. In this paper we also disentangle other contributions to the overall spectrum shape observed with this kind of detector, proving that its detection efficiency can be made reasonably high and that the gamma/neutron discrimination capability is comparable to the one of 3 He tubes.

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High resolution measurements of neutron energy spectra from AmBe and AmB neutron sources

Cited by 97 publications

References 20 publications

Quenching factor for low-energy nuclear recoils in a plastic scintillator

Quenching factor for low-energy nuclear recoils in a plastic scintillator

Lowering the low-energy threshold of xenon-based detectors

Characterization of the silicon+6LiF thermal neutron detection technique

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