A. Saunders

Characterizing the AFP Spin Flipper for the Nab Experiment

Rebecca Godri, Ricardo Alarcón, S. Baeßler, L. J. Broussard et autres

The Nab experiment at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) aims to yield a precise measurement of the electron-neutrino correlation parameter, $a$, to $\frac{\Delta a}{a}=1\times10^{-3}$ from the beta-decay of the free neutron. To achieve Nab’s precision goal, …

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Measurement of the free neutron lifetime in a magneto-gravitational trap with in situ detection

R. Musedinovic, L. Blokland, C. Cude-Woods, M. S. Singh et autres

Here we publish three years of data from the UCN\ensuremath{\tau} experiment performed at the Los Alamos Ultracold Neutron Facility at the Los Alamos Neutron Science Center. These data are in addition to our previously published data. Our goals in this paper are …

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Search for the Neutron Decay n → X + γ , Where X is a Dark Matter Particle

Z. Tang, M. Blatnik, L. J. Broussard, J. H. Choi et autres

Fornal and Grinstein recently proposed that the discrepancy between two different methods of neutron lifetime measurements, the beam and bottle methods, can be explained by a previously unobserved dark matter decay mode, n→X+γ. We perform a search for this decay mode over …

us, fr (code pays fourni par la source)

Measurements of ultracold neutron upscattering and absorption in polyethylene and vanadium

É. I. Sharapov, C. L. Morris, M. Makela, A. Saunders et autres

The study of neutron cross sections for elements used as efficient ``absorbers'' of ultracold neutrons (UCN) is crucial for many precision experiments in nuclear and particle physics, cosmology and gravity. In this context, ``absorption'' includes both the capture and upscattering of neutrons …

ru, us, fr (code pays fourni par la source)

Scattering muon radiography and its application to the detection of high-Z materials

K.N. Borozdin, G.E. Hogan, C.L. Morris, W.C. Priedhorsky et autres

We have proposed a new method for nuclear material contraband detection based on cosmic ray muon radiography. The method is safe, because it does not include the generation of any artificial radiation, but uses naturally produced high-energy muons. Results obtained with our …

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Development of multi-frame detector for ultra-fast radiography with 800 MeV protons

K. Kwiatkowski, J.-F. Beche, M. Burks, G. Hart et autres

Two prototype small-area pixilated detectors, capable of recording signals produced by 800 MeV proton beam micropulses, with a repetition rate of 358 ns, were constructed. The first detector system was built around a two-dimensional photodiode array. The array was illuminated by light …

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The Range of the Hoary Marmot in Montana

A. Saunders