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Neutron research

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Displaying 476 - 500 of 1582

Progress Towards Operation of a Deuterium Cold Neutron Source at the NCNR

June 1, 2020
Author(s)
John M Jurns, Michael Middleton, Robert E. Williams
The NIST Center for Neutron Research (NCNR) operates a 20 MW research reactor that produces neutrons for a suite of 30 neutron scattering instruments. 70% of these instruments use cold neutrons (E 2), which is in turn cooled by a recently commissioned 7 kW

Advances in Translational Nanotechnology: Challenges and Opportunities

May 28, 2020
Author(s)
Shyam S. Mohapatra, Robert D. Frisina, Subhra Mohapatra, Kevin B. Sneed, Eleni Markoutsa, Tao Wang, Rinku Dutta, Ratka Damnjanovic, Manh-Huong Phan, Daniel J. Denmark, Manas R. Biswal, Andrew R. McGill, Ryan Green, Mark Howell, Payal Ghosh, Alejandro Gonzalez, Nadia Tasnim Ahmed, Brittney Borresen, Mitchell Farmer, Melissa Gaeta, Krishna Sharma, Christen Bouchard, Danielle Gamboni, Jaime Martin, Bianca Tolve, Mandip Singh, Jack W. Judy, Chenzhong Li, Swadeshmukul Santra, Sylvia Daunert, Elnaz Zeynaloo, Ryan M. Gelfand, Steven Lenhert, Eric S. McLamore, Dong Xiang, Victoria Morgan, Lisa E. Friedersdorf, Ratnesh Lal, Thomas J. Webster, David Hoogerheide, Thanh Duc Nguyen, Martin J. D'Souza, Mustafa Culha, Pierre P. Kondiah, Donald K. Martin

Polymer Dynamics in Block Copolymer Electrolytes Detected by Neutron Spin Echo

May 19, 2020
Author(s)
Whitney S. Loo, Antonio Faraone, Lorena S. Grundy, Kevin W. Gao, Nitash P. Balsara
Polymer chain dynamics of a nanostructured block copolymer electrolyte are investigated by neutron spin-echo spectroscopy. Monomeric friction, determined by fitting the short-time data to the Rouse model, increases with increasing salt concentration. Tube

Non-fuel Antineutrino Contributions in the High Flux Isotope Reactor

May 14, 2020
Author(s)
PROSPECT COLLABORATION, Jerome LaRosa, Hans Pieter Mumm, Svetlana Nour, Mark Tyra, Denis E. Bergeron
Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties starting to surpass those from theory, it is important to carefully consider all sources of e in making theoretical predictions

In Situ Neutron Scattering of Antibody Adsorption during Protein A Chromatography

April 26, 2020
Author(s)
Maria Papachristodoulou, James Doutch, Hoi Sang Beatrice Leung, Andy Church, Thomas Charleston, Luke A. Clifton, Paul Butler, Christopher J. Roberts, Daniel G. Bracewell
A deeper understanding of the nano and mesoscale structure of chromatographic adsorbents and the distribution of proteins within the media, is critical to a mechanistic understanding of separation processes using these materials. Characterisation of the

Spatial Distribution of PEO-PPO-PEO Block copolymer and PEO Homopolymer in Lipid Bilayers

April 7, 2020
Author(s)
Mihee Kim, Frank Heinrich, Greg Haugstad, Guichuan Yu, Guangcui Yuan, Sushil K. Satija, Wenjia Zhang, Hannah S. Seo, Joseph M. Metzger, Samira M. Azarin, Timothy P Lodge, Benjamin J. Hackel, Frank S. Bates
Maintaining the integrity of cell membranes is indispensable for cellular viability. Poloxamer 188 (P188), a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer with a number average molecular weight of 8

Inter-Kramers Transitions and Spin-Phonon Couplings in a Lanthanide-Based Single-Molecule Magnet

April 6, 2020
Author(s)
Duncan H. Moseley, Shelby E. Stavretis, Zhenhua Zhu, Mei Guo, Craig Brown, Mykhaylo Ozerov, Yongqiang Cheng, Luke L. Daemen, Rachael Richardson, Gary Knight, Komalavalli Thirunavukkuarasu, Anibal J. Ramirez-Cuesta, Jinkui Tang, Zi-Ling Xue
Spin-phonon coupling plays a critical role in magnetic relaxation in single-molecule magnets (SMMs) and molecular qubits. Yet, few studies of its nature have been conducted. Phonons here refer to both intermolecular and intramolecular vibrations. In the

Metastability and Reversibility of Anionic Redox-Based Cathode for High-Energy Rechargeable Batteries

March 25, 2020
Author(s)
Bao Qiu, Minghao Zhang, Seung-Yong Lee, Haodong Liu, Thomas A. Wynn, Lijun Wu, Yimei Zhu, Wen Wen, Craig Brown, Dong Zhou, Zhaoping Liu, Ying Shirley Meng
Great focus has been placed on the advancement of anionic redox, to which Li-rich layered oxide cathodes high capacities - currently exceeding 300 mAh g -1 - are attributed. With almost doubled capacity compared with present cathode materials, performance

Interleaflet Coupling of n-Alkane Incorporated Bilayers

March 14, 2020
Author(s)
Hatsuho Usuda, Mafumi Hishida, Elizabeth Kelley, Yasuhisa Yamamura, Michihiro Nagao, Kazuya Saito
The relationship between the membrane bending modulus (k) and compressibility modulus (KA) depends on the extent of coupling between the two monolayers (leaflets). Using neutron spin echo (NSE) spectroscopy, we investigate the effects of n-alkanes on the
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