Article
Energy & Fuels
Dimiter Alexandrov
Summary: Replicable experimental results on low-energy nuclear fusion reactions demonstrate that helium (including He-3 and He-4 isotopes) can be synthesized through the interaction of deuterium nuclei with solids in the experimental system. The concentration of generated helium is found to increase with both the kinetic energy of the interacting deuterium nuclei and the temperature of the sample holder.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Editorial Material
Multidisciplinary Sciences
Jeff Tollefson, Elizabeth Gibney
Summary: Researchers at the US National Ignition Facility achieved a reaction that resulted in a net energy gain.
News Item
Multidisciplinary Sciences
Elizabeth Gibney
Summary: The Joint European Torus has set a new record by generating double the amount of energy from fusing atoms.
Article
Physics, Multidisciplinary
A. C. Dombos, D. Robertson, A. Simon, T. Kadlecek, M. Hanhardt, J. Gorres, M. Couder, R. Kelmar, O. Olivas-Gomez, E. Stech, F. Strieder, M. Wiescher
Summary: This study reports the direct measurement of resonance strengths for the 18O and 22Ne reaction, providing new data for several resonances. The results decrease the stellar reaction rate in the temperature range of stellar helium burning compared to previous works.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
D. S. Rosa, T. Frederico, G. Krein, M. T. Yamashita
Summary: In this study, we analytically solved the three-body mass-imbalanced problem with zero-range resonantly interacting particles in D dimensions. By applying the Bethe-Peierls boundary conditions for zero-energy two-body bound states in D dimensions, we derived the negative energy eigenstates of the three-body Schrodinger equation. The solution exhibits an Efimov-like discrete scaling factor dependence on dimension. The analytical form of the mass-imbalanced three-body bound-state wave function can be utilized to explore the effective dimension of asymmetric cold atomic traps near the Efimov limit for Feshbach resonances.
Article
Physics, Fluids & Plasmas
Austin Lo, Lee Bernstein
Summary: We demonstrate the generation of a nuclear-excited low-temperature plasma source using a high surface-to-volume ratio porous electrode structure within an ionizing radiation field. The energy absorption efficiency and specific ion output current are significantly higher in the porous electrode system compared to the solid electrode system. This research has important implications for plasma science and ionizing radiation applications.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
F. Salehi, M. Le, L. Railing, M. Kolesik, H. M. Milchberg
Summary: In this study, laser wakefield acceleration of high-quality electron beams up to 15 MeV at a 1-kHz repetition rate was demonstrated without the need for carrier-envelope phase stabilization. Low beam divergence was achieved through reduced sensitivity to laser carrier-envelope phase slip, using gas jet position control and laser polarization.
Article
Optics
T. Secker, D. J. M. Ahmed-Braun, P. M. A. Mestrom, S. J. J. M. F. Kokkelmans
Summary: The study shows that the realization of two-body multichannel interactions can affect the Efimov spectrum, especially for resonances of intermediate width. The deviations in the Efimov spectra are caused by trimer states in the closed interaction channels. In the broad resonance limit, all excited Efimov trimer energies approach the corresponding single-channel system levels.
Article
Optics
Shangguo Zhu, Zhenhua Yu, Shizhong Zhang
Summary: We studied the three-body recombination of identical fermionic atoms and derived an expression for the rate constant. Using a zero-range model for the p-wave interaction, we computed the corrections for temperature and interaction dependence.
Article
Optics
Yaakov Yudkin, Paul S. Julienne, Lev Khaykovich
Summary: This article investigates the influence of the near degeneracy of two near-degenerate two-body continua on the few-body physics in ultracold collisions of bosonic lithium atoms. A minimal model with two atomic continua and one closed molecular channel is used for analysis, allowing the study of the spin composition of loosely bound dimers and trimers. The results show qualitative agreement with the well-established coupled-channel calculation phenomenology of lithium in the two-body sector, while the Efimov trimer energy levels in the three-body sector follow a different functional form compared to a single continuum scenario. The study suggests that the experimentally observed exotic behavior of the first excited Efimov energy level is most likely caused by the short-range details of the interaction potential.
Article
Environmental Studies
Cristovao Araripe Marinho, Alberto Almeida Santos, Julio Vieira Neto, Osvaldo Luiz Goncalves Quelhas
Summary: The majority of films tend to portray nuclear energy in a negative light, with only a small percentage depicting it positively. Cinema has long associated the nuclear field with danger and tragedy.
ENERGY RESEARCH & SOCIAL SCIENCE
(2021)
Article
Optics
M. Iskin
Summary: This study explores the three-body problem in a generic multiband lattice, obtaining the exact solution of coupled integral equations through a variational approach and simplifying it to an eigenvalue problem. It reveals that energetically stable trimers are allowed in a two-band setting, with trimers having a nearly flat dispersion when formed in a flat band.
Article
Optics
R. M. Francisco, D. S. Rosa, T. Frederico
Summary: In this study, we investigate the spectrum and structure of two heavy bosonic impurities immersed in a light boson system with noninteger dimensions. The energies of consecutive many-body bound states, following an Efimov-type geometrical scaling law under resonant s-wave interaction, are found to be dependent on the mass asymmetry, number of light bosons, and effective dimension D. Additionally, we compute the wave function and explore its behavior under different system configurations. As an example, we consider mixtures of heavy cesium atoms interacting with lithium atoms, which are currently of experimental interest.
Review
Energy & Fuels
Wuqing Du, Wei You, Zhenqing Xu
Summary: China's commercial nuclear energy developments have seen improvements in key indicators over the past four decades, and the legal system regulating commercial nuclear energy has also evolved in three phases. While the legal needs of nuclear energy development, operation, supervision and regulation have been largely met, there are still some issues that need to be addressed.
Editorial Material
Multidisciplinary Sciences
Jun Cao
Summary: An unusual measurement from a nuclear reactor led to a three-year hunt for the elusive sterile neutrino. The search definitively proves that sterile neutrinos do not exist, yet the anomaly continues to persist.
Article
Physics, Multidisciplinary
Lucas Platter
Article
Physics, Nuclear
J. Braun, H. -W. Hammer, L. Platter
EUROPEAN PHYSICAL JOURNAL A
(2018)
Article
Physics, Nuclear
Samuel B. Emmons, Chen Ji, Lucas Platter
Summary: In this study, the longitudinal structure function of the deuteron is calculated up to next-to-next-to-leading order within the framework of pionless effective field theory. These calculations are used to determine the two-photon polarizability contribution to the Lamb shift in muonic deuterium, allowing for the extraction of the nuclear charge radius of the deuteron. The analytical expressions for relevant transition matrix elements and the longitudinal structure function, as well as numerical results for the corresponding contributions to the Lamb shift, are presented. The impact of relativistic and higher-order effects is also discussed, with the findings showing agreement with previous calculations and an explanation for the accuracy of the current calculation.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Wael Elkamhawy, Zichao Yang, Hans-Werner Hammer, Lucas Platter
Summary: The research team calculated the rate of the rare decay Be-11 into Be-10 + p + e(-) + (nu) over bar (e) using Halo effective field theory to describe beta-delayed proton emission. They assumed a resonance in the Be-10-p system consistent with a recent experiment, obtaining a branching ratio and predicting a resonance width. The experimental results and resonance parameters were found to be consistent, and it was demonstrated that no exotic mechanisms are needed to explain the experimental decay rate.
Article
Physics, Multidisciplinary
Daniel Odell, Manuel Pavon Valderrama, Lucas Platter
Summary: Effective field theories require regularization and renormalization to make accurate predictions. Although regularization is not essential for the observable predictions of EFTs, the details of regulatory dependence can provide insights into the inner workings of an EFT. By quantitatively comparing the inferred residual cutoff dependence from different regulators, we demonstrate that cutoff variations provide limited information about uncertainties and power counting (at least in practical settings).
Article
Physics, Nuclear
Chinmay Mishra, A. Ekstrom, G. Hagen, T. Papenbrock, L. Platter
Summary: This study investigates the effects of different potentials on nucleon-nucleon interactions, revealing a surprisingly low breakdown momentum and demonstrating how accuracy and renormalization group invariance of phase shifts can be improved by adding contact terms.
Article
Physics, Nuclear
Zichao Yang, Emanuele Mereghetti, Lucas Platter, Matthias R. Schindler, Jared Vanasse
Summary: The electric dipole moments (EDMs) of three-nucleon systems are calculated in pionless effective field theory. Both one-body contributions from permanent proton and neutron EDMs and two-body contributions from charge-parity-odd nucleon-nucleon interactions are considered. The momentum dependence of the electric dipole form factor in the Wigner limit is found to be similar to the charge form factor, indicating proper renormalization.
Article
Optics
Daniel Odell, Arnoldas Deltuva, Lucas Platter
Summary: In this study, the potential use of a pure van der Waals potential as a starting point for an effective field theory to describe three-body processes in ultracold atomic systems is evaluated using a system of three He-4 atoms. The results demonstrate that the approach is effective and shows good agreement with realistic potential results. Additionally, it is shown that no three-body force is required at leading order in this effective field theory approach, and a universal correlation between three-body observables exists in the absence of an Efimov three-body parameter under universal van der Walls physics.
Article
Optics
Marcel Schmidt, H-W Hammer, L. Platter
Article
Physics, Nuclear
Hilla De-Leon, Lucas Platter, Doron Gazit
Article
Physics, Nuclear
D. Odell, A. Deltuva, J. Bonilla, L. Platter
Article
Physics, Nuclear
Bijaya Acharya, Lucas Platter, Gautam Rupak
Article
Physics, Nuclear
M. Schmidt, L. Platter, H-W Hammer
Article
Physics, Nuclear
Bijaya Acharya, Andreas Ekstrom, Lucas Platter
Article
Optics
Samuel B. Emmons, Daekyoung Kang, Bijaya Acharya, Lucas Platter
