Article
Physics, Multidisciplinary
E. Lopez-Saavedra, S. Almaraz-Calderon, B. W. Asher, L. T. Baby, N. Gerken, K. Hanselman, K. W. Kemper, A. N. Kuchera, A. B. Morelock, J. F. Perello, E. S. Temanson, A. Volya, I Wiedenhover
Summary: In this study, a near-threshold proton resonance in B-11 was observed using the inverse kinematics method and a beam of the radioactive isotope Be-10. The results indicate that this resonance state exhibits the characteristics of a threshold resonance, making it an ideal case for studying quantum near-threshold many-body dynamics of unstable states.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
Nguyen Le Anh, Bui Minh Loc, Naftali Auerbach, Vladimir Zelevinsky
Summary: The excitation function of proton elastic scattering from Be-10 at keV energy is calculated using the method of self-consistent Skyrme Hartree-Fock in the continuum. The calculation successfully reproduces the narrow near-threshold proton-emitting resonance (E-x = 11.4 MeV, gamma = 6 keV, and quantum number J(pi) = 1/2+) in B-11 relevant to the beta-delayed proton emission of Be-11. This supports the recent experimental result of Ayyad et al. at the ReA3 reaccelerator facility of the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University. The resonance is interpreted as the s1/2 single-proton resonance state in the Skyrme Hartree-Fock mean-field theory.
Article
Chemistry, Multidisciplinary
Chen Cao, Ji-Hua Tan, Ze-Lin Zhu, Jiu-Dong Lin, Hong-Ji Tan, Huan Chen, Yi Yuan, Man-Kit Tse, Wen-Cheng Chen, Chun-Sing Lee
Summary: By intramolecular cyclization in a carbonyl/N resonant core (QAO), a deep-blue emitter (CZ2CO) with a peak wavelength of 440 nm and an ultranarrow spectral FWHM of 16 nm (0.10 eV) was developed. CZ2CO exhibits excellent performance that complies with the BT.2020 standard. Additionally, a hyper-fluorescent device based on CZ2CO achieves a high maximum external quantum efficiency (EQE(max)) of 25.6% and maintains an EQE of 22.4% at a practical brightness of 1000 cd m(-2).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jorgen Skibsted, SeyedHosein Payandeh, Morten B. Ley, Torben R. Jensen
Summary: Isotropic and anisotropic couplings between the B-11 nuclear spin and the electron spin of paramagnetic electrons were observed in B-11 MAS NMR spectra of alpha-Pr(BH4)(3) and LiCe(BH4)(3)Cl. The isotropic and anisotropic paramagnetic interactions were found to be approximately 5 and 4 times larger for alpha-Pr(BH4)(3) compared to LiCe(BH4)(3)Cl, which mainly reflects the difference in electron spin for the Pr3+ and Ce3+ ions and the relative distances between ions in the compounds.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Y. Ayyad, W. Mittig, T. Tang, B. Olaizola, G. Potel, N. Rijal, N. Watwood, H. Alvarez-Pol, D. Bazin, M. Caamano, J. Chen, M. Cortesi, B. Fernandez-Dominguez, S. Giraud, P. Gueye, S. Heinitz, R. Jain, B. P. Kay, E. A. Maugeri, B. Monteagudo, F. Ndayisabye, S. N. Paneru, J. Pereira, E. Rubino, C. Santamaria, D. Schumann, J. Surbrook, L. Wagner, J. C. Zamora, V Zelevinsky
Summary: A narrow near-threshold proton-emitting resonance (E-x = 11.4 MeV, J(pi) = 1/2(+), and Gamma(p) = 4.4 keV) was directly observed in B-11 via proton resonance scattering. The good agreement between both experimental results confirms the existence of such exotic decay and the particular behavior of weakly bound nuclei coupled to the continuum.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics
S. Gustafson, Li Wang
Summary: Chiral magnetic skyrmions are topological solitons that arise in ferromagnets with micromagnetic energy including a chiral (Dzyaloshinskii-Moriya) interaction term. When the chiral interaction is small, skyrmions on R-2 with co-rotational symmetry are close to harmonic maps. This study provides another quantitative proof of recent skyrmion stability results.
JOURNAL OF FUNCTIONAL ANALYSIS
(2021)
Article
Astronomy & Astrophysics
Kiminad A. Mamo, Ismail Zahed
Summary: In this study, the diffractive photoproduction of J/'P on a nucleon is analyzed using a holographic QCD model. The predictions for this process are refined with new lattice data, and the scalar and mass radii of the nucleon are estimated using the results.
Article
Engineering, Electrical & Electronic
Satadal Dutta, Raymond J. E. Hueting, Gerard J. Verbiest
Summary: In this study, we present an avalanche-mode light-emitting transistor (AMLET) in silicon, which emits light with a record low bandwidth. The AMLET achieves high optical power efficiency through a combination of a resonant cavity and carrier injection, providing new possibilities for improving the performance of silicon optical interconnects and sensors.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Materials Science, Multidisciplinary
P. Rodionovs, M. Kemere, A. Antuzevics, A. Sarakovskis, A. Fedotovs, U. Rogulis
Summary: In this study, we investigated the luminescence properties of Fe-doped CaAl12O19 using optical and electron paramagnetic resonance techniques. Our results revealed that Fe3+ emits intense luminescence in the infrared region under ultraviolet excitation, and additional blue and near-infrared luminescence bands appear at low temperatures. The luminescence intensity and decay time were found to depend on temperature and Fe3+ concentration.
Review
Optics
Maria Vasilopoulou, Azhar Fakharuddin, F. Pelayo Garcia de Arquer, Dimitra G. Georgiadou, Hobeom Kim, Abd Rashid bin Mohd Yusoff, Feng Gao, Mohammad Khaja Nazeeruddin, Henk J. Bolink, Edward H. Sargent
Summary: Near-infrared light-emitting diodes fabricated by solution-processed means using organic semiconductors, halide perovskites, and colloidal quantum dots have become a promising technological platform for various applications including biomedical, night vision, surveillance, and optical communications. Despite achieving high external quantum efficiencies exceeding 20%, challenges remain in achieving high radiance, reducing efficiency roll-off, and extending operating lifetime. This review summarizes recent advances in emissive materials synthetic methods and device key attributes contributing to improved performance of the fabricated light-emitting devices.
Article
Chemistry, Multidisciplinary
Mingming Jiang, Kai Tang, Peng Wan, Tong Xu, Haiying Xu, Caixia Kan
Summary: Exciton-polariton light-emitting diodes (LEDs) were successfully fabricated using high quality whispering gallery mode (WGM) microcavities naturally formed by hexagon-shaped Ga-doped ZnO microwires and p-GaAs templates. The exciton-polariton coupling strength in single microwire-based LEDs can be tuned by adjusting the microcavity size.
Article
Physics, Multidisciplinary
Putong Wang, Xiangai Deng, Zhiguo Ma, Changbo Fu, Lulin Fan, Qingsong Wang, Jiancai Xu, Tongjun Xu, Liangliang Ji, Baifei Shen, Yancheng Liu, Xiguang Cao, Guoqiang Zhang, Yugang Ma
Summary: Due to the harsh radiation environment of strong laser plasma, most semiconductor-based detectors cannot work well. Therefore, developing new detecting techniques with higher detection thresholds and highly charged particle resolution is crucial for investigating nuclear fusion reactions in laser-plasma environments. The CR-39 detector, which is mainly sensitive to ions and insensitive to backgrounds such as electrons and photons, has been widely used for detecting charged particles in laser-plasma environments. This study focuses on reducing the proton sensitivity of CR-39 by using a potassium-ethanol-water (PEW) etching solution in order to raise the detection threshold for the research of laser-induced (11) B(p, a)2a reaction.
FRONTIERS IN PHYSICS
(2023)
Article
Chemistry, Physical
Jianhua Lin, Liuyan Zhou, Long Ren, Yuyu Shen, Yanling Chen, Jie Fu, Lei Lei, Renguang Ye, Degang Deng, Shiqing Xu
Summary: This study introduces a new wide band NIR luminescent phosphor with extensive application prospects. It has a wide emission spectrum, high quantum efficiency, and good thermal stability, making it suitable for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Winn Huynh, Jordan W. Taylor, W. Hill Harman, Matthew P. Conley
Summary: Interactions between transition metals and Lewis acids (M -> Z linkages) are of academic significance and practical importance. The study examined solid-state B-11{H-1} NMR spectra of metal complexes containing a phosphine substituted 9,10-diboraanthracene ligand (B2P2), revealing differences in C-Q and omega values between planar and tetrahedral boron environments. The presence of a M -> BR3 linkage was found to relate to the reduction in C-Q and B-11 NMR shielding properties.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Jiaojie Yang, Peihua He, Yijie Xie, Qiang Chen, Quan Dong, Wendong Nie, Fengli Yang, Wei Wang, Fu Du, Jiaqing Peng, Xinyu Ye
Summary: A brand-new blue phosphor NaSrScSi2O7: Eu2+ with high absorption efficiency and wide emission band has been successfully prepared. The phosphor exhibits excellent performance in the near-ultraviolet absorption and short-wavelength blue light emission. Packaged white light-emitting diode devices using this phosphor show lower correlated color temperature and improved color rendering index, indicating its potential prospects for applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Nuclear
Raghu Bollapragada, Matt Menickelly, Witold Nazarewicz, Jared O'Neal, Paul-Gerhard Reinhard, Stefan M. Wild
Summary: This paper discusses the calibration of a computationally expensive nuclear physics model, focusing on the performance of optimization-based training algorithms when training data and concurrent model evaluations are limited. Using the Fayans energy density functional model as a case study, considerations for tuning in different computational settings are analyzed and illustrated.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
A. Koszorus, X. F. Yang, W. G. Jiang, S. J. Novario, S. W. Bai, J. Billowes, C. L. Binnersley, M. L. Bissell, T. E. Cocolios, B. S. Cooper, R. P. de Groote, A. Ekstrom, K. T. Flanagan, C. Forssen, S. Franchoo, R. F. Garcia Ruiz, F. P. Gustafsson, G. Hagen, G. R. Jansen, A. Kanellakopoulos, M. Kortelainen, W. Nazarewicz, G. Neyens, T. Papenbrock, P. -G. Reinhard, C. M. Ricketts, B. K. Sahoo, A. R. Vernon, S. G. Wilkins
Summary: Nuclear charge radii serve as sensitive probes of the nucleon-nucleon interaction and nuclear matter properties, posing a challenge for nuclear theory. Experimental evidence suggests a new magic neutron number at N=32 in the calcium region, with unexpectedly large increases in charge radii raising questions about nuclear size evolution in neutron-rich systems. Advanced nuclear theories offer different explanations for the odd-even variations and notable increase in charge radii beyond N=28, highlighting limitations in our understanding of neutron-rich systems and issues in current nuclear theory models.
Article
Physics, Multidisciplinary
A. Hamaker, E. Leistenschneider, R. Jain, G. Bollen, S. A. Giuliani, K. Lund, W. Nazarewicz, L. Neufcourt, C. R. Nicoloff, D. Puentes, R. Ringle, C. S. Sumithrarachchi, I. T. Yandow
Summary: This study provides evidence of a deformed double-shell closure in Zr-80 through high-precision mass measurements, showing that it is more strongly bound than previously thought. The findings suggest that there are still challenges in the field of nuclear physics, which require a combination of new observations and theoretical advancements for resolution.
Article
Physics, Multidisciplinary
S. Malbrunot-Ettenauer, S. Kaufmann, S. Bacca, C. Barbieri, J. Billowes, M. L. Bissell, K. Blaum, B. Cheal, T. Duguet, R. F. Garcia Ruiz, W. Gins, C. Gorges, G. Hagen, H. Heylen, J. D. Holt, G. R. Jansen, A. Kanellakopoulos, M. Kortelainen, T. Miyagi, P. Navratil, W. Nazarewicz, R. Neugart, G. Neyens, W. Noertershauser, S. J. Novario, T. Papenbrock, T. Ratajczyk, P. G. Reinhard, L. Rodriguez, R. Sanchez, S. Sailer, A. Schwenk, J. Simonis, V Soma, S. R. Stroberg, L. Wehner, C. Wraith, L. Xie, Z. Y. Xu, X. F. Yang, D. T. Yordanov
Summary: Collinear laser spectroscopy was used to study the nuclear charge radii of nickel isotopes. Three ab initio methods were compared, with agreement in differential radii but only the NNLOsat method showing consistent absolute radii. The Skyrme functional SV-min was found to match experimental results more closely in nuclear density functional theory.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz
Summary: The study focused on the parity-violating asymmetry A(PV) in Pb-208 using modern relativistic and nonrelativistic energy density functionals. By optimizing new functionals, predictions were made for the neutron skin thickness and symmetry-energy slope in Pb-208. The results were consistent with astrophysical data and differed from those obtained using a specific set of relativistic functionals.
PHYSICAL REVIEW LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Mengzhi Chen, Tong Li, Bastian Schuetrumpf, Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: The HFBFFT solver, based on Sky3D code, is developed to study the weakly bound nuclei affected by the quasiparticle continuum space. It solves the underlying equations directly in the canonical basis using fast Fourier transform, and implements measures like soft energy cutoff and pairing annealing to address the problems encountered in the pairing collapse. The accuracy and performance of HFBFFT have been tested and compared with other HFB codes for various nuclei.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Felix Sommer, Kristian Konig, Dominic M. Rossi, Nathan Everett, David Garand, Ruben P. de Groote, Jason D. Holt, Phillip Imgram, Anthony Incorvati, Colton Kalman, Andrew Klose, Jeremy Lantis, Yuan Liu, Andrew J. Miller, Kei Minamisono, Takayuki Miyagi, Witold Nazarewicz, Wilfried Noertershaeuser, Skyy V. Pineda, Robert Powel, Paul-Gerhard Reinhard, Laura Renth, Elisa Romero-Romero, Robert Roth, Achim Schwenk, Chandana Sumithrarachchi, Andrea Teigelhofer
Summary: Nuclear charge radii of Ni-55;56 were measured using collinear laser spectroscopy, and it was found that the trend of charge radii across shell closures is similar to that of calcium. The study also revealed the impact of M1 excitations between spin-orbit partners.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Multidisciplinary
Amber Boehnlein, Markus Diefenthaler, Nobuo Sato, Malachi Schram, Veronique Ziegler, Cristiano Fanelli, Morten Hjorth-Jensen, Tanja Horn, Michelle P. Kuchera, Dean Lee, Witold Nazarewicz, Peter Ostroumov, Kostas Orginos, Alan Poon, Xin-Nian Wang, Alexander Scheinker, Michael S. Smith, Long-Gang Pang
Summary: The advances in machine learning methods have broadened their applicability in scientific research, including nuclear physics, which has been greatly transformed by these techniques.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz
Summary: The recent experimental determination of the parity violating asymmetry APV in 48Ca and 208Pb at Jefferson Lab is important for understanding the arrangement of neutrons and protons inside atomic nuclei. To assess the impact of these measurements, a rigorous theoretical investigation and evaluation of associated uncertainties were conducted. The study concluded that accurate description of APV in 48Ca and 208Pb cannot be achieved by their models.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
V Cirigliano, Z. Davoudi, J. Engel, R. J. Furnstahl, G. Hagen, U. Heinz, H. Hergert, M. Horoi, C. W. Johnson, A. Lovato, E. Mereghetti, W. Nazarewicz, A. Nicholson, T. Papenbrock, S. Pastore, M. Plumlee, D. R. Phillips, P. E. Shanahan, S. R. Stroberg, F. Viens, A. Walker-Loud, K. A. Wendt, S. M. Wild
Summary: This article presents the results of a study on the calculation of nuclear matrix elements for neutrinoless double-beta decay. It discusses recent progress, uncertainty quantification, and future plans to provide accurate and precise matrix elements.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Physics, Nuclear
Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: In this study, the impact of local shell effects on the statistical correlations between quadrupole deformations and charge radii in Er, Yb, and Hf isotopes is investigated. The results show that the correlations between nuclear deformations and charge radii are affected by the underlying shell structure, and the correlation range is rather short even for well deformed nuclei.
Article
Physics, Nuclear
Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: Differences in charge radii of mirror nuclei are suggested to contain information on the slope of the symmetry energy. However, statistical correlation analysis shows that the difference in charge radii, Delta R-ch(mir), is an inferior indicator compared to other observables such as neutron skin or electric dipole polarizability. The presence of pairing correlations and low-lying proton continuum affects Delta R-ch(mir). Therefore, the precise data on mirror charge radii cannot provide a stringent constraint on the slope of the symmetry energy L.
Article
Physics, Nuclear
Markus Kortelainen, Zhonghao Sun, Gaute Hagen, Witold Nazarewicz, Thomas Papenbrock, Paul-Gerhard Reinhard
Summary: The radii of nuclear charge distributions provide information about the forces inside the atomic nucleus. The global behavior of nuclear charge radii is determined by nuclear matter properties, while the local trends are influenced by the motion of protons and neutrons. By analyzing even-even nuclei from calcium to zinc, two advanced theories based on nuclear interactions reveal a universal pattern and demonstrate the impact of nuclear properties and shell structure on the differential charge radii.
Article
Physics, Nuclear
Jhilam Sadhukhan, Samuel A. Giuliani, Witold Nazarewicz
Summary: This paper introduces a global modeling approach to fission fragment distributions and investigates the effects of odd-even staggering in charge yields and neutron evaporation. The results show that this approach can accurately predict the mass and charge yields of fissioning nuclei, including the odd-even staggering. The method also successfully describes the isotopic yields and provides insights into the fragment distributions of neutron-rich and superheavy systems.
Article
Physics, Nuclear
J. Wylie, J. Okolowicz, W. Nazarewicz, M. Ploszajczak, S. M. Wang, X. Mao, N. Michel
Summary: Single-nucleon knockout reaction studies of proton-dripline nuclei C-9 and O-13 suggest suppression of spectroscopic factors, with continuum effects strongly affecting well-bound orbits in dripline systems but having less impact on weakly bound states.
