@article{tang_watkins_clayton_currie_fellers_hassan_hooks_ito_lawrence_macdonald_et al._2021, title={Ultracold neutron properties of the Eljen-299-02D deuterated scintillator}, volume={92}, ISSN={["1089-7623"]}, DOI={10.1063/5.0030972}, abstractNote={In this paper, we report studies of the Fermi potential and loss per bounce of ultracold neutrons (UCNs) on a deuterated scintillator (Eljen-299-02D). These UCN properties of the scintillator enable its use in a wide variety of applications in fundamental neutron research.}, number={2}, journal={REVIEW OF SCIENTIFIC INSTRUMENTS}, author={Tang, Z. and Watkins, E. B. and Clayton, S. M. and Currie, S. A. and Fellers, D. E. and Hassan, Md T. and Hooks, D. E. and Ito, T. M. and Lawrence, S. K. and MacDonald, S. W. T. and et al.}, year={2021}, month={Feb} }
 @article{coakley_dewey_huber_huffer_huffman_marley_mumm_o'shaughnessy_schelhammer_thompson_et al._2016, title={Survival analysis approach to account for non-exponential decay rate effects in lifetime experiments}, volume={813}, ISSN={["1872-9576"]}, url={https://doi.org/10.1016/j.nima.2015.12.064}, DOI={10.1016/j.nima.2015.12.064}, abstractNote={In a variety of neutron lifetime experiments, in addition to $\beta-$decay, neutrons can be lost by other mechanisms including wall losses. Failure to account for these other loss mechanisms produces systematic measurement error and associated systematic uncertainties in neutron lifetime measurements. In this work, we develop a physical model for neutron wall losses and construct a competing risks survival analysis model to account for losses due to the joint effect of $\beta-$decay losses, wall losses of marginally trapped neutrons, and an additional absorption mechanism. We determine the survival probability function associated with the wall loss mechanism by a Monte Carlo method. Based on a fit of the competing risks model to a subset of the NIST experimental data, we determine the mean lifetime of trapped neutrons to be approximately 700 s -- considerably less than the current best estimate of (880.1 $\pm$ 1.1) s promulgated by the Particle Data Group [1]. Currently, experimental studies are underway to determine if this discrepancy can be explained by neutron capture by ${}^3$He impurities in the trapping volume. Analysis of the full NIST data will be presented in a later publication.}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT}, publisher={Elsevier BV}, author={Coakley, K. J. and Dewey, M. S. and Huber, M. G. and Huffer, C. R. and Huffman, P. R. and Marley, D. E. and Mumm, H. P. and O'Shaughnessy, C. M. and Schelhammer, K. W. and Thompson, A. K. and et al.}, year={2016}, month={Mar}, pages={84–95} }
 @article{o'shaughnessy_golub_schelhammer_swank_seo_huffman_dzhosyuk_mattoni_yang_doyle_et al._2009, title={Measuring the neutron lifetime using magnetically trapped neutrons}, volume={611}, ISSN={["1872-9576"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-71549134894&partnerID=MN8TOARS}, DOI={10.1016/j.nima.2009.07.054}, abstractNote={The neutron beta-decay lifetime plays an important role both in understanding weak interactions within the framework of the Standard Model and in theoretical predictions of the primordial abundance of 4He in Big Bang Nucleosynthesis. In previous work, we successfully demonstrated the trapping of ultracold neutrons (UCN) in a conservative potential magnetic trap. A major upgrade of the apparatus is nearing completion at the National Institute of Standards and Technology Center for Neutron Research (NCNR). In our approach, a beam of 0.89 nm neutrons is incident on a superfluid 4He target within the minimum field region of an Ioffe-type magnetic trap. A fraction of the neutrons is downscattered in the helium to energies <200 neV, and those in the appropriate spin state become trapped. The inverse process is suppressed by the low phonon density of helium at temperatures less than 200 mK, allowing the neutron to travel undisturbed. When the neutron decays the energetic electron ionizes the helium, producing scintillation light that is detected using photomultiplier tubes. Statistical limitations of the previous apparatus will be alleviated by significant increases in field strength and trap volume resulting in twenty times more trapped neutrons.}, number={2-3}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT}, author={O'Shaughnessy, C. M. and Golub, R. and Schelhammer, K. W. and Swank, C. M. and Seo, P. -N. and Huffman, P. R. and Dzhosyuk, S. N. and Mattoni, C. E. H. and Yang, L. and Doyle, J. M. and et al.}, year={2009}, month={Dec}, pages={171–175} }
 @article{yang_brome_butterworth_dzhosyuk_mattoni_mckinsey_michniak_doyle_golub_korobkina_et al._2008, title={Invited article: Development of high-field superconducting Ioffe magnetic traps}, volume={79}, number={3}, journal={Review of Scientific Instruments}, author={Yang, L. and Brome, C. R. and Butterworth, J. S. and Dzhosyuk, S. N. and Mattoni, C. E. H. and McKinsey, D. N. and Michniak, R. A. and Doyle, J. M. and Golub, R. and Korobkina, E. and et al.}, year={2008} }