Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

Autor: C. Cude-Woods, F. M. Gonzalez, E. M. Fries, T. Bailey, M. Blatnik, N. B. Callahan, J. H. Choi, S. M. Clayton, S. A. Currie, M. Dawid, B. W. Filippone, W. Fox, P. Geltenbort, E. George, L. Hayen, K. P. Hickerson, M. A. Hoffbauer, K. Hoffman, A. T. Holley, T. M. Ito, A. Komives, C.-Y. Liu, M. Makela, C. L. Morris, R. Musedinovic, C. O'Shaughnessy, R. W. Pattie, J. Ramsey, D. J. Salvat, A. Saunders, E. I. Sharapov, S. Slutsky, V. Su, X. Sun, C. Swank, Z. Tang, W. Uhrich, J. Vanderwerp, P. Walstrom, Z. Wang, W. Wei, A. R. Young

The past two decades have yielded several new measurements and reanalyses of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff6426b82b1f3f2a9694e9c61d9b6c96
http://arxiv.org/abs/2205.02323

Position-sensitive detection of ultracold neutrons with an imaging camera and its implications to spectroscopy

Autor: E. B. Dees, John Ramsey, Robert W. Pattie, D. J. Morley, Mark Makela, Jose Ortiz, B. A. Zeck, E. I. Sharapov, J. Wexler, S. J. Seestrom, Albert Young, Scott Currie, K. K. H. Leung, Zhehui Wang, C. Cude-Woods, Charles L. Morris, Evan R. Adamek, N. B. Callahan, S. M. Clayton, Peter Geltenbort, Leah Broussard, Alexander Saunders, Kevin Hickerson, Tanner L. Womack, Mark A. Hoffbauer, Takeyasu M. Ito, X. Ding, Wanchun Wei, Chen-Yu Liu, Z. Tang, Sky Sjue, A. T. Holley

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 830:36-43

Position-sensitive detection of ultracold neutrons (UCNs) is demonstrated using an imaging charge-coupled device (CCD) camera. A spatial resolution less than 15 $\mu$m has been achieved, which is equivalent to an UCN energy resolution below 2 pico-el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea7a8d20bccc941a3c78509b38fca068
https://doi.org/10.1016/j.nima.2016.05.058

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

Autor: Z, Tang, M, Blatnik, L J, Broussard, J H, Choi, S M, Clayton, C, Cude-Woods, S, Currie, D E, Fellers, E M, Fries, P, Geltenbort, F, Gonzalez, K P, Hickerson, T M, Ito, C-Y, Liu, S W T, MacDonald, M, Makela, C L, Morris, C M, O'Shaughnessy, R W, Pattie, B, Plaster, D J, Salvat, A, Saunders, Z, Wang, A R, Young, B A, Zeck

Publikováno v: Physical review letters. 121(2)

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::11fc630124ffe99698c6ee612c99c162
https://pubmed.ncbi.nlm.nih.gov/30085691

Performance of the upgraded ultracold neutron source at Los Alamos National Laboratory and its implication for a possible neutron electric dipole moment experiment

Autor: S. K. L. Sjue, C. Cude-Woods, C.-Y. Liu, N. B. Callahan, Aaron Sprow, Peter Geltenbort, Stuart Macdonald, Robert W. Pattie, D. E. Fellers, D. J. Salvat, Scott Currie, Z. Tang, S. M. Clayton, J. H. Choi, Andy Saunders, Charles L. Morris, A. R. Young, Takeyasu M. Ito, Wanchun Wei, X. Ding, John Ramsey, Mark Makela, H. L. Weaver, Evan R. Adamek, Steve K. Lamoreaux, Edward I. Sharapov

Publikováno v: Physical Review C
Physical Review C, American Physical Society, 2018, 97 (1), pp.012501. ⟨10.1103/PhysRevC.97.012501⟩
Phys.Rev.C
Phys.Rev.C, 2018, 97 (1), pp.012501. ⟨10.1103/PhysRevC.97.012501⟩
Phys.Rev.C, 2018, 97 (1), pp.012501. 〈10.1103/PhysRevC.97.012501〉

The ultracold neutron (UCN) source at Los Alamos National Laboratory (LANL), which uses solid deuterium as the UCN converter and is driven by accelerator spallation neutrons, has been successfully operated for over 10 years, providing UCN to various

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24281d319f837a14796309fafc907edd
https://hal.archives-ouvertes.fr/hal-01703829

Evaluation of commercial nickel-phosphorus coating for ultracold neutron guides using a pinhole bottling method

Autor: C. Cude-Woods, Christopher Morris, D. J. Salvat, B. A. Zeck, Scott Currie, Z. Tang, N. B. Callahan, Wanchun Wei, Th. Brenner, Yasuhiro Masuda, John Ramsey, Robert W. Pattie, Aaron Brandt, Leah Broussard, Alexander Saunders, Chen-Yu Liu, S. M. Clayton, Mark Makela, T. Lauer, Peter Geltenbort, Juri Schroffenegger, Albert Young, Zhehui Wang, Erik B. Watkins, Jaroslaw Majewski, Takeyasu M. Ito, Evan R. Adamek

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2017, 872, pp.64-73. ⟨10.1016/j.nima.2017.07.051⟩
Nucl.Instrum.Meth.A
Nucl.Instrum.Meth.A, 2017, 872, pp.64-73. ⟨10.1016/j.nima.2017.07.051⟩
Nucl.Instrum.Meth.A, 2017, 872, pp.64-73. 〈10.1016/j.nima.2017.07.051〉

We report on the evaluation of commercial electroless nickel phosphorus (NiP) coatings for ultracold neutron (UCN) transport and storage. The material potential of 50~$\mu$m thick NiP coatings on stainless steel and aluminum substrates was measured t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b843f1735343c3a2776b9ea9869d3408
http://arxiv.org/abs/1703.00508