Article
Nuclear Science & Technology
Yu-Chen Dong, Tian-Hao Wang, Wolfgang Kreuzpaintner, Xiao-Tao Liu, Ze-Hui Li, Yu-Dong Kang, Jun-Pei Zhang, Long Tian, Chu-Yi Huang, Bo Bai, Xin Tong
Summary: A miniaturized neutron spin flipper based on a high-Tc superconductor film has been developed, utilizing non-adiabatic spin flipping and the Meissner effect for magnetic field shielding. This flipper provides a universal neutron spin flip capability over a wide wavelength range. The compact design with a vacuum heat shield and low-power refrigerator allows for efficient operation in a small size.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Article
Quantum Science & Technology
Ivana Dimitrova, Stuart Flannigan, Yoo Kyung Lee, Hanzhen Lin, Jesse Amato-Grill, Niklas Jepsen, Ieva Cepaite, Andrew J. Daley, Wolfgang Ketterle
Summary: By manipulating the spin states of ultracold atoms in an optical lattice system, a transition from a fully magnetized state to a correlated zero-magnetization state has been achieved, and the formation of correlations has been demonstrated. These findings highlight the potential and challenges for preparing many-body eigenstates of spin Hamiltonians through adiabatic preparation protocols.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jiahui Zhang, Nida Naim, Li Deng, Yueping Niu, Shangqing Gong
Summary: In this paper, the non-Hermitian stimulated Raman shortcut-to-adiabatic passage (NH-STIRSAP) is used to create ultracold deeply-bound molecules. By assuming large single-photon detuning and/or strong loss rate of the excited level, the NH three-level system can be simplified to an effective two-level system. The NH-STIRSAP achieves complete population transfer from the Feshbach to the ground level, greatly improving the creation efficiency of ultracold deeply-bound molecules. The robustness and fast transfer speed of NH-STIRSAP facilitate the creation and detection of these molecules.
RESULTS IN PHYSICS
(2023)
Article
Instruments & Instrumentation
Tingting Wang, Xiaoqing Tu, Yan Wang, Xinxi Li, Jian Gong, Guangai Sun
Summary: This study presents the design and simulations of the spin-echo small-angle neutron scattering (SESANS) spectrometer at the China Mianyang research reactor. Monte Carlo simulations were conducted to determine the technical parameters of key components. The optimized ampere-turns and magnetic field homogeneity were determined through finite element simulations and testing. A multilayer flipper-permalloy was designed and tested for neutron experiments. The construction of the SESANS is currently underway and is expected to be completed by the end of 2021.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Physics, Multidisciplinary
Iwan Setiawan, Riska Ekawita, Ryan Sugihakim, Bobby Eka Gunara
Summary: We discussed the use of the fast-forward method proposed by Masuda and Nakamura to accelerate the adiabatic quantum dynamics of the XY spin model. The accelerated scheme involves adding a driving Hamiltonian to the original Hamiltonian and increasing the speed with a large time-scaling factor and an adiabatic parameter. By assuming the driving Hamiltonian consists of pair-wise exchange interaction and a magnetic field, the fast-forward driving is achieved for adiabatic states. We applied this method to the XY spin model on the Kagome lattice and found that adding the XY pair-wise exchange interaction of nearest and next-nearest neighbors as a driving interaction accelerates the adiabatic motion, ensuring complete fidelity of accelerated states.
Article
Physics, Nuclear
J. M. Alarcon, J. A. Oller
Summary: We investigate the effect of P-wave interactions on the energy of a degenerate gas of spin-1/2 fermions. By summing the ladder diagrams, we calculate the energy per particle in the many-body system and obtain a renormalized result. It is found that the resonance poles caused by P-wave interactions contradict the Hermiticity of the Hamiltonian, resulting in the instability of unpolarized spin-1/2 fermionic normal matter.
Article
Quantum Science & Technology
R. Badea, M. S. Wolf, J. Berezovsky
Summary: We study experimentally and numerically the implementation of 7r/2 rotations of a single nitrogen-vacancy defect spin state near a magnetic vortex core. The controlled dynamics of the vortex core can offer rapidly-tunable magnetic fields for spin qubit control, but the non-equilibrium dynamics of the vortex core complicate high-fidelity gate operations. The complex profile of the driven vortex core fringe field leads to unpredictable enhancement of Zeeman splitting and Rabi frequency, and the gyrotropic dynamics of the vortex core result in a complicated evolution of the spin state. Adiabatic passage protocol is shown to improve the fidelity of pi/2 rotations by enhancing spin splitting and Rabi frequency while suppressing unwanted vortex dynamics.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Rebekah Hermsmeier, Jacek Klos, Svetlana Kotochigova, Timur V. Tscherbul
Summary: It is possible to efficiently control ultracold chemical reactions by choosing the internal hyperfine and rovibrational states of the reactants and inducing magnetic Feshbach resonances. The reaction rates are sensitive to the initial hyperfine states of the reactants, and fully spin-polarized states can significantly suppress the reaction. Magnetic Feshbach resonances can also change reaction rate coefficients by several orders of magnitude.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jacopo Valsecchi, Malgorzata G. Makowska, Youngju Kim, Seung Wook Lee, Christian Grunzweig, Florian M. Piegsa, Michel A. Thijs, Jeroen Plomp, Markus Strobl
Summary: The study demonstrates how a polarized beam in Talbot-Lau interferometric imaging can be utilized to analyze strong magnetic fields, and the potential of spin analyzed dark-field contrast imaging for probing polarization dependent small-angle scattering and magnetic microstructures is highlighted.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Jedrzej A. Jawor, Thomas M. Tauris
Summary: The study investigates the spin evolution of magnetars and potential evolutionary links to other species of neutron stars. By synthesizing magnetar populations and comparing them to observations, it is found that the B-field decay must be exponential or superexponential, and the initial spin period should be less than 2 seconds. Additionally, magnetars may be linked to XDINSs evolutionarily, but are unlikely to evolve into RRATs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
F. Anzuini, A. Melatos, C. Dehman, D. Vigano, J. A. Pons
Summary: This study discusses the need for internal heating sources in neutron star models to reconcile theoretical cooling rates with observational data, focusing on moderately magnetized, isolated thermally emitting stars. By considering different internal heating mechanisms, the study finds that neutron star models can match observations of such stars through proper internal heating.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Materials Science, Characterization & Testing
Christian X. Young, Chloe A. Browning, Ryan J. Thurber, Matthew R. Smalley, Michael J. Liesenfelt, Jason P. Hayward, Nicole Mcfarlane, Michael P. Cooper, Jeff R. Preston
Summary: The development of a scalable flat-panel neutron radiography device is crucial for meeting the nondestructive testing needs of the expanding industrial market. By using a specific detector and readout module, images from gamma and neutron sources were successfully generated, demonstrating high spatial resolution capabilities.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2023)
Article
Physics, Nuclear
D. A. Testov, A. Boso, S. M. Lenzi, F. Nowacki, F. Recchia, G. de Angelis, D. Bazzacco, G. Colucci, M. Cottini, F. Galtarossa, A. Goasduff, A. Gozzelino, G. Jaworski, P. R. John, S. Lunardi, R. Menegazzo, D. Mengoni, A. Mentana, V Modamio, A. Nannini, D. R. Napoli, M. Palacz, M. Rocchini, M. Siciliano, J. J. Valiente-Dobon
Summary: In this study, Mirror Energy Differences (MED) between excited states in the A=31, T=1/2 mirror pair S-31 and P-31 were measured up to high spin yrast states of positive and negative parity. The MED values were described in the framework of the shell model with main contributions from the Coulomb interaction, but the isospin symmetry breaking term was also found to be important for reproducing experimental findings.
Article
Physics, Multidisciplinary
Xiaojian Bai, Shang-Shun Zhang, Zhiling Dun, Hao Zhang, Qing Huang, Haidong Zhou, Matthew B. Stone, Alexander Kolesnikov, Feng Ye, Cristian D. Batista, Martin Mourigal
Summary: Neutron-scattering measurements on FeI2 reveal a dispersive band of mixed dipolar-quadrupolar fluctuations just above its ground state, an exotic magnetic excitation without a classical counterpart. This excitation arises from anisotropic exchange interactions that hybridize overlapping modes carrying fundamentally different quantum numbers. Our work highlights the possibility of quantum excitations without classical counterparts even in the presence of fully developed magnetic order.
Article
Astronomy & Astrophysics
Kostas Glampedakis, Arthur G. Suvorov
Summary: This study investigates three accreting X-ray pulsars and models their observed spin-up rates using standard torque models. The inclusion of a physically motivated phenomenological parameter enhances the disc-integrated accretion torque, making the 'new' torque models compatible with observed spin-up rates and inferred magnetic fields. Additional physics effects, such as the presence of a multipolar magnetic field and general relativistic gravity, are also discussed.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Physics, Nuclear
A. Addazi, K. Anderson, S. Ansell, K. S. Babu, J. L. Barrow, D. Baxter, P. M. Bentley, Z. Berezhiani, R. Bevilacqua, R. Biondi, C. Bohm, G. Brooijmans, L. J. Broussard, J. Cedercall, C. Crawford, P. S. B. Dev, D. D. DiJulio, A. D. Dolgov, K. Dunne, P. Fierlinger, M. R. Fitzsimmons, A. Fomin, M. J. Frost, S. Gardiner, S. Gardner, A. Galindo-Uribarri, P. Geltenbort, S. Girmohanta, P. Golubev, E. Golubeva, G. L. Greene, T. Greenshaw, V Gudkov, R. Hall-Wilton, L. Heilbronn, J. Herrero-Garcia, A. Holley, G. Ichikawa, T. M. Ito, E. Iverson, T. Johansson, L. Jonsson, Y-J Jwa, Y. Kamyshkov, K. Kanaki, E. Kearns, Z. Kokai, B. Kerbikov, M. Kitaguchi, T. Kittelmann, E. Klinkby, A. Kobakhidze, L. W. Koerner, B. Kopeliovich, A. Kozela, V Kudryavtsev, A. Kupsc, Y. T. Lee, M. Lindroos, J. Makkinje, J. Marquez, B. Meirose, T. M. Miller, D. Milstead, R. N. Mohapatra, T. Morishima, G. Muhrer, H. P. Mumm, K. Nagamoto, A. Nepomuceno, F. Nesti, V. V. Nesvizhevsky, T. Nilsson, A. Oskarsson, E. Paryev, R. W. Pattie, S. Penttil, H. Perrey, Y. N. Pokotilovski, I Potashnikovav, K. Ramic, C. Redding, J-M Richard, D. Ries, E. Rinaldi, N. Rizzi, N. Rossi, A. Ruggles, B. Rybolt, V Santoro, U. Sarkar, A. Saunders, G. Senjanovic, A. P. Serebrov, H. M. Shimizu, R. Shrock, S. Silverstein, D. Silvermyr, W. M. Snow, A. Takibayev, I Tkachev, L. Townsend, A. Tureanu, L. Varriano, A. Vainshtein, J. de Vries, R. Wagner, R. Woracek, Y. Yamagata, S. Yiu, A. R. Young, L. Zanini, Z. Zhang, O. Zimmer
Summary: The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation, aiming to discover and characterize mixing in the neutron, antineutron, and sterile neutron sectors. This experiment addresses open questions related to baryogenesis, dark matter, and new physics scales, and has the potential to significantly increase sensitivity in neutron conversion probability tests.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Instruments & Instrumentation
K. Kuk, C. Cude-Woods, C. R. Chavez, J. H. Choi, J. Estrada, M. Hoffbauer, S. E. Holland, M. Makela, C. L. Morris, E. Ramberg, E. R. Adamek, T. Bailey, M. Blatnik, L. J. Broussard, M. A-P Brown, N. B. Callahan, S. M. Clayton, S. Currie, B. W. Filippone, E. M. Fries, P. Geltenbort, F. Gonzalez, M. T. Hassan, L. Hayen, K. P. Hickerson, A. T. Holley, T. M. Ito, C-Y Liu, P. Merkel, R. Musedinovic, C. O'Shaughnessy, R. W. Pattie, B. Plaster, D. J. Salvat, A. Saunders, E. Sharapov, X. Sun, Z. Tang, W. Wei, J. W. Wexler, A. R. Young, Zhehui Wang
Summary: UCN projection imaging demonstrated using boron-coated back-illuminated CCD camera and Los Alamos UCN source. Direct detection of neutron capture byproducts and reduced thermal noise in scientific CCD camera results in significant improvement in signal-to-noise ratio. bCCD with sub-pixel resolution, spatial resolution less than 100 μm, and large area is suitable for quantum science of UCN.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Physics, Multidisciplinary
F. M. Gonzalez, E. M. Fries, C. Cude-Woods, T. Bailey, M. Blatnik, L. J. Broussard, N. B. Callahan, J. H. Choi, S. M. Clayton, S. A. Currie, M. Dawid, E. B. Dees, 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. Sharapov, S. Slutsky, V Su, X. Sun, C. Swank, Z. Tang, W. Uhrich, J. Vanderwerp, P. Walstrom, Z. Wang, W. Wei, A. R. Young
Summary: This study reports an improved measurement of the free neutron lifetime using the UCN τ apparatus, with a value of τ(n) = 877.75 seconds obtained through multiple data acquisition campaigns.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
L. J. Broussard, J. L. Barrow, L. DeBeer-Schmitt, T. Dennis, M. R. Fitzsimmons, M. J. Frost, C. E. Gilbert, F. M. Gonzalez, L. Heilbronn, E. B. Iverson, A. Johnston, Y. Kamyshkov, M. Kline, P. Lewiz, C. Matteson, J. Ternullo, L. Varriano, S. Vavra
Summary: There is an unexplained > 4 sigma discrepancy between beam and bottle measurements of the neutron lifetime. A new proposed model suggests that conversions of neutrons into mirror neutrons can increase the apparent neutron lifetime by 1% via a small mass splitting between the two states. However, a search performed at a higher magnetic field excludes this explanation for the neutron lifetime discrepancy.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Prajwal Mohanmurthy, Albert R. Young, Jeff A. Winger, Geza Zsigmond
Summary: Baryon number violation is important for baryogenesis. The existence of mirror particles could lead to oscillation between neutrons and mirror-neutrons. Recent analysis of experiments searching for oscillation have found anomalies that could indicate the detection of neutron-mirror-neutron oscillation.
Article
Nuclear Science & Technology
Ekaterina Korobkina, Igor Berkutov, Robert Golub, Paul Huffman, Clark Hickman, Kent Leung, Graham Medlin, Matthew J. Morano, Thomas Rao, Cole Teander, Christian White, Albert R. Young
Summary: This study experimentally investigated the growth of a large ortho-deuterium crystal in a UCN source cryostat, and found that the crystal's quality, shape, and changes during annealing were highly dependent on the temperature profile of the cryostat walls.
JOURNAL OF NEUTRON RESEARCH
(2022)
Article
Instruments & Instrumentation
F. Backman, J. Barrow, Y. Bessler, A. Bianchi, C. Bohm, G. Brooijmans, H. Calen, J. Cederkall, J. I. M. Damian, E. Dian, D. D. Di Julio, K. Dunne, L. Eklund, M. J. Ferreira, P. Fierlinger, U. Friman-Gayer, C. Happe, M. Holl, T. Johansson, Y. Kamyshkov, E. Klinkby, R. Kolevatov, A. Kupsc, B. Meirose, D. Milstead, A. Nepomuceno, T. Nilsson, A. Oskarsson, H. Perrey, K. Ramic, B. Rataj, N. Rizzi, V Santoro, S. Silverstein, W. M. Snow, A. Takibayev, R. Wagner, M. Wolke, S. C. Yiu, A. R. Young, L. Zanini, O. Zimmer
Summary: The NNBAR experiment at the European Spallation Source aims to search for free neutrons converting to antineutrons with significantly improved sensitivity compared to previous searches. This paper discusses progress towards a conceptual design report for NNBAR, detailing the design of various components such as moderator, neutron reflector, beamline, shielding and annihilation detector. Simulations used in the study help form a model that will be used to optimize the experiment design and quantify its sensitivity.
JOURNAL OF INSTRUMENTATION
(2022)
Article
Instruments & Instrumentation
R. Wagner, J. Barrow, C. Bohm, G. Brooijmans, H. Calen, J. Cederkall, J. Collin, K. Dunne, L. Eklund, P. Fierlinger, U. Friman-Gayer, M. Frost, M. Holl, T. Johansson, Y. Kamyshkov, E. Klinkby, A. Kupsc, B. Meirose, D. Milstead, A. Nepomuceno, T. Nilsson, A. Oskarsson, H. Perrey, B. Rataj, N. Rizzi, V. Santoro, S. Silverstein, A. Takibayev, M. Wolke, S. C. Yiu, A. R. Young, L. Zanini, O. Zimmer
Summary: The NNBAR experiment at the European Spallation Source aims to detect the conversion of free neutrons to antineutrons, with a sensitivity improvement three orders of magnitude higher than the previous search. This paper presents simulations of the neutron optical reflector, a key component of the experiment, and discusses the expected gains in sensitivity.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Engineering, Electrical & Electronic
Zhehui Wang, Christophe Dujardin, Matthew S. Freeman, Amanda E. Gehring, James F. Hunter, Paul Lecoq, Wei Liu, Charles L. Melcher, C. L. Morris, Martin Nikl, Ghanshyam Pilania, Reeju Pokharel, Daniel G. Robertson, Daniel J. Rutstrom, Sky K. Sjue, Anton S. Tremsin, S. A. Watson, Brenden W. Wiggins, Nicola M. Winch, Mariya Zhuravleva
Summary: Radiographic imaging and tomography (RadIT) has evolved from Rontgen's X-ray work in 1895 and now encompasses a wide range of IT modalities. It plays a critical role in medical diagnosis and industrial applications, while also serving as a powerful tool for scintillator discovery and development.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2023)
Article
Instruments & Instrumentation
Guangliang Yang, Josh Schoetker, Dan Poulson, Elena Guardincerri, J. M. Durham, Sven Vogel, Shaun Hoerner, Derek Aberle, Ke-Xun Sun, C. L. Morris, Ralf Kaiser, Andrew Osborne
Summary: Cosmic ray muons are massive charged particles that can penetrate through dense material, making them ideal for nondestructive imaging. A Giant Muon Tracker was used to measure muon tracks passing through samples and validate a Monte Carlo simulation. The imaging results from the simulation and experiment showed excellent agreement.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Physics, Nuclear
Leendert Hayen, Jin Ha Choi, Dustin Combs, Stefan Baessler, Noah Birge, Leah J. Broussard, Christopher B. Crawford, Nadia Fomin, Michael Gericke, Francisco Gonzalez, Aaron Jezghani, Nick Macsai, Mark Makela, David G. Mathews, Russell Mammei, Mark McCrea, August Mendelsohn, Austin Nelsen, Grant Riley, Tom Shelton, Sky Sjue, Erick Smith, Albert R. Young, Bryan Zeck
Summary: The Nab experiment at Oak Ridge National Laboratory aims to measure the beta-antineutrino angular correlation following neutron decay with a precision of approximately 0.1%. Proton momentum is reconstructed through time-of-flight measurements, with careful control of potential systematic biases due to detector effects at the nanosecond level. This study presents a comprehensive simulation effort to provide precise pulse shapes and discusses relevant systematic effects and potential measurement schemes.
Article
Instruments & Instrumentation
S. Lin, J. K. Baldwin, M. Blatnik, S. M. Clayton, C. Cude-Woods, S. A. Currie, B. Filippone, E. M. Fries, P. Geltenbort, A. T. Holley, W. Li, C. -Y. Liu, M. Makela, C. L. Morris, R. Musedinovic, C. O'Shaughnessy, R. W. Pattie, D. J. Salvat, A. Saunders, E. I. Sharapov, M. Singh, X. Sun, Z. Tang, W. Uhrich, W. Wei, B. Wolfe, A. R. Young, Z. Wang
Summary: This study utilizes physics-informed deep learning to enhance the experimental position resolution of ultracold neutron (UCN) measurements, achieving sub-micron spatial resolutions. Synthetic hit images with ground-truth position labels are generated using open-source software, and a fully-connected neural network is trained to learn the mapping from input hit images to output hit position.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Proceedings Paper
Nuclear Science & Technology
A. Kozela, K. Bodek, J. Choi, L. DeKeukeleere, K. Dhanmeher, M. Engler, G. Gupta, K. Lojek, K. Pysz, D. Ries, D. Rozpedzik, N. Severijns, T. Soldner, B. Wloch, N. Yazdandoost, A. R. Young, J. Zejma
Summary: In this study, a Mott polarimetry and the combination of the time of flight method were applied to measure the transverse polarization components of electrons from free neutron decay and reconstruct the momentum of protons. This allowed access to eleven correlation coefficients of the neutron beta-decay. The successful measurement of some of these coefficients provides unique access to exotic scalar and tensor couplings of weak interactions and offers new constraints on their imaginary part.
28TH INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, INPC 2022
(2023)
Article
Physics, Nuclear
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
Summary: In the past two decades, there have been new measurements and reanalysis of older measurements of the neutron lifetime. These measurements have revealed a significant discrepancy between different techniques used. In this paper, we introduce a new measurement method and present a result that is consistent with previous studies.
