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, Particles & Fields
Tommaso Comellato, Matteo Agostini, Stefan Schoenert
Summary: The analysis of electrical signals produced by energy depositions in germanium detectors can distinguish events with different topologies, which is crucial for experiments searching for the neutrinoless double beta decay of Ge-76. Standard calibration procedures use a Th-228 source to tune selection criteria, but the energy spatial distributions of Th-228 events have subtle differences compared to double-beta decay events. This work characterizes these topological differences and evaluates calibration techniques using a Co-56 source, providing important insights for future experiments requiring reliable efficiency estimation.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Engineering, Aerospace
Ramanath Cowsik, Dawson Huth
Summary: We use a phenomenological approach in a minimal model to study the spectral intensity of secondary cosmic-ray particles such as positrons, antiprotons, Lithium, Beryllium, and Boron. Our analysis shows that at GeV energies, cosmic rays traverse a significant amount of matter in the regions surrounding their sources. This amount decreases with increasing cosmic-ray energy and becomes negligible beyond 100 GeV. In the interstellar medium, cosmic rays of all energies up to 105 GeV/n pass through approximately 1-2 g/cm2 of matter before entering the intergalactic medium. The bulk of positrons and antiprotons are generated in the interstellar medium. Additionally, cosmic-ray nuclei like C, N, and O produce additional amounts of Li, Be, and B nuclei with spectra similar to those of C, O, etc. The implications of these minimal model findings for gamma-ray observations and the importance of spatial and temporal discreteness of cosmic-ray sources for modeling cosmic-ray propagation are briefly discussed.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Instruments & Instrumentation
O. A. Shehu, B. P. Crider, T. Ginter, C. R. Hoffman, T. H. Ogunbeku, Y. Xiao, K. L. Childers, P. Chowdhury, C. Fry, E. Lamere, R. Lewis, S. N. Liddick, B. Longfellow, S. Lyons, S. K. Neupane, D. Perez-Loureiro, C. J. Prokop, A. L. Richard, U. Silwal, D. P. Siwakoti, D. C. Smith, M. K. Smith
Summary: This study provides fundamental data for producing isomer-enriched rare-isotope beams by investigating the isomeric content of a Cl-34 beam.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Astronomy & Astrophysics
Javier F. Acevedo, Amit Bhoonah, Joseph Bramante
Summary: This study explores a new signature of bosonic dark matter interacting with the interstellar medium and places constraints on the fraction of boson star dark matter through calculations of diffuse photon flux.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Chemistry, Physical
Sefa Sayin, Meryem Seferinoglu, Emin Yeltepe, Berkay Cetin, Senem Senturk Lule
Summary: This study provides a methodology to generate efficiency curve with simulations instead of experiments, reducing the need for additional experiments. The detection efficiency of HPGe detectors was calculated with high-level accuracy using the EGSnrc Monte Carlo code. Comparison with the MCNP6.2 code showed that both codes can generate reliable detection efficiency curves. The experimental results showed good agreement with the activity values calculated using simulated efficiencies.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Astronomy & Astrophysics
Jianhong Ruan, Zechun Zheng, Wei Zhu
Summary: The study suggests that high energy gamma-ray emissions from pulsars may be influenced by gluon condensation effects, which can be explored through the characteristic broken power law in the gamma-ray spectra observed from pulsars.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
Kevin J. Kelly, Manibrata Sen, Yue Zhang
Summary: The self-interacting neutrino hypothesis provides motivation for addressing the tension between the origin of sterile neutrino dark matter and indirect detection constraints, and can produce a variety of testable signals from laboratories to the cosmos. In certain models, there must be a lower bound on the amount of extra radiation in the early Universe, which will be further strengthened with an improved x-ray search at the Athena observatory. This intimate relationship will be unambiguously tested by the upcoming CMB Stage 4 project.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
S. Iimura, M. Rosenbusch, A. Takamine, Y. Tsunoda, M. Wada, S. Chen, D. S. Hou, W. Xian, H. Ishiyama, S. Yan, P. Schury, H. Crawford, P. Doornenbal, Y. Hirayama, Y. Ito, S. Kimura, T. Koiwai, T. M. Kojima, H. Koura, J. Lee, J. Liu, S. Michimasa, H. Miyatake, J. Y. Moon, S. Naimi, S. Nishimura, T. Niwase, A. Odahara, T. Otsuka, S. Paschalis, M. Petri, N. Shimizu, T. Sonoda, D. Suzuki, Y. X. Watanabe, K. Wimmer, H. Wollnik
Summary: The atomic masses of 55Sc, 56'58Ti, and 56-59V have been measured using a high-precision multireflection time-of-flight technique. By reducing the mass uncertainties, the study sheds new light on the N = 34 shell effect in Ti and V isotopes. The results indicate the nonexistence of the N = 34 empirical two-neutron shell gaps for Ti and V and identify an enhanced energy gap unique to Ca.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
I. Briki, M. Mazouz, L. Ghedira
Summary: We report measurements of the angular distributions of low momentum atmospheric muons at 38 m above sea level for zenith angles between -60 and 60 degrees in the south-north direction. The muon detection was performed using two NaI(Tl) scintillation detectors mounted in coincidence. The integrated and differential muon flux were determined by analyzing the deposited energy spectra in the scintillators backed up by a Geant4 simulation of the experimental setup. The results are consistent with the cosn(0) distribution and fill the gap in the geomagnetic cutoff rigidity interval 8 GV < Pc < 14 GV where no similar measurements were performed before. We found that n = 1.88 - 0.12 P mu c in the domain of muon momentum cutoff P mu c < 1 GeV/c. These measurements are useful for muon studies requiring accurate integrated flux.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Wei Zhu, Zechun Zheng, Peng Liu, Lihong Wan, Jianhong Ruan, Fan Wang
Summary: The gluon condensation in the proton serves as a dynamical model to explain a series of unsolved puzzles in sub-TeV gamma ray spectra.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
David F. Pollard, John Robinson, Hisako Shiona, Dan Smale
Summary: This study describes a change in operational instrument for the routine measurement of column-averaged dry-air mole fraction of several greenhouse gases at the Lauder Total Carbon Column Observing Network site, and the steps taken to demonstrate comparability between the two observation systems. The intercomparison found that the average difference between the two observing systems was well below the expected level of uncertainty for TCCON retrievals for all compared species. The study specifically noted that for X-CO2, the average difference was 0.0264 +/- 0.0465% (0.11 +/- 0.19 mu mol mol(-1)).
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Astronomy & Astrophysics
N. Dhital, P. Homola, D. Alvarez-Castillo, D. Gora, K. Almeida Cheminant, B. Poncyljusz, J. Medrala, G. Opila, A. Bhatt, B. Lozowski, T. Bretz, L. Del Peral, A. R. Duffy, A. C. Gupta, B. Hnatyk, P. Jagoda, M. Kasztelan, K. Kopanski, P. Kovacs, M. Krupinski, M. Medvedev, V Nazari, M. Niedzwiecki, D. Ostrogorski, M. Piekarczyk, M. D. Rodriguez Frias, K. Rzecki, K. Smelcerz, K. Smolek, J. Stasielak, O. Sushchov, T. Wibig, K. Wozniak, J. Zamora-Saa, Z. Zimboras, A. Tursunov
Summary: This study uses Monte Carlo simulations to investigate the cascade development of ultra-high energy photons in the solar magnetosphere, finding that the photons in the cascades have a spatial extension of millions of kilometers on a plane distant from the Sun by 1 AU. The study estimates the chance of detection and provides an optimistic estimate rate from a chosen ring-shaped region around the Sun.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Meteorology & Atmospheric Sciences
G. S. Diniz, I. S. Ferreira, Y. Wada, T. Enoto
Summary: Relativistic runaway electron avalanches involve a large multiplication of high-energy electrons, requiring a high electric field and energetic particles as seeds. This phenomenon is connected to terrestrial gamma-ray flashes and gamma-ray glows, possibly sharing a common source mechanism, but with distinct characteristics and timescales. The study shows that chain reactions from TGF byproducts can sustain gamma-ray glows and provide seeds for RREAs.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Engineering, Electrical & Electronic
N. Abgrall, J. M. Allmond, I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, F. E. Bertrand, B. Bos, M. Busch, M. Buuck, T. S. Caldwell, C. M. Campbell, Y. -D. Chan, C. D. Christofferson, Pinghan Chu, M. L. Clark, H. L. Crawford, C. Cuesta, J. A. Detwiler, A. Drobizhev, D. W. Edwins, Yu. Efremenko, H. Ejiri, S. R. Elliott, T. Gilliss, G. K. Giovanetti, M. P. Green, J. Gruszko, I. S. Guinn, V. E. Guiseppe, C. R. Haufe, R. J. Hegedus, R. Henning, D. Hervas Aguilar, E. W. Hoppe, A. Hostiuc, M. F. Kidd, I. Kim, R. T. Kouzes, A. M. Lopez, J. M. Lopez-Castano, E. L. Martin, R. D. Martin, R. Massarczyk, S. J. Meijer, S. Mertens, J. Myslik, T. K. Oli, G. Othman, W. Pettus, A. W. P. Poon, D. C. Radford, J. Rager, A. L. Reine, K. Rielage, N. W. Ruof, M. J. Stortini, D. Tedeschi, R. L. Varner, S. Vasilyev, B. R. White, J. F. Wilkerson, C. Wiseman, W. Xu, C. -H. Yu, B. X. Zhu, B. Shanks
Summary: In order to achieve high-resolution spectral analysis and efficient pulse shape discrimination in experiments, non-linearities in analog-to-digital conversion (ADC) were carefully measured and corrected, significantly reducing systematic energy uncertainty.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Andreas Jensen, Fedor Zhuravlev, Gregory Severin, Charlotte Busk Magnus, Jesper Fonslet, Ulli Koster, Mikael Jensen
APPLIED RADIATION AND ISOTOPES
(2020)
Article
Chemistry, Inorganic & Nuclear
C. Shaun Loveless, Boone E. Marois, Samuel J. Ferran, John T. Wilkinson, Logan Sutherlin, Gregory Severin, Jennifer A. Shusterman, Nicholas D. Scielzo, Mark A. Stoyer, David J. Morrissey, J. David Robertson, Graham F. Peaslee, Suzanne E. Lapi
APPLIED RADIATION AND ISOTOPES
(2020)
Article
Chemistry, Inorganic & Nuclear
E. Paige Abel, Hannah K. Clause, Gregory W. Severin
APPLIED RADIATION AND ISOTOPES
(2020)
Article
Instruments & Instrumentation
Katharina A. Domnanich, E. Paige Abel, Hannah K. Clause, Colton Kalman, Wesley Walker, Gregory W. Severin
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2020)
Article
Biology
Pil M. Fredericia, Mattia Siragusa, Ulli Koster, Gregory Severin, Torsten Groesser, Mikael Jensen
Summary: This study provides an experimental setup using Cs-131 and dosimetry for studying the relative biological effectiveness (RBE) of Auger emitters. The intracellular activity concentration of Cs-131 was measured over time to evaluate RBE-values. The findings are important for understanding the biological effects of Auger emitters in different cell lines.
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
(2023)
Article
Instruments & Instrumentation
E. Paige Abel, Katharina Domnanich, Colton Kalman, Wes Walker, Jonathan W. Engle, Todd E. Barnhart, Greg Severin
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2020)
Article
Chemistry, Multidisciplinary
E. Paige Abel, Katharina Domnanich, Hannah K. Clause, Colton Kalman, Wes Walker, Jennifer A. Shusterman, John Greene, Matthew Gott, Gregory W. Severin
Article
Chemistry, Inorganic & Nuclear
E. Paige Abel, Chloe Kleinfeldt, Morgan Kalman, Gregory W. Severin
Summary: Using a sample of 47Ca produced through isotope harvesting, branching ratios for different characteristic gamma rays were measured, as well as the branching ratio for 47Ca to 47Sc beta decay and from ground state to excited state. The measurements presented greatly increased precision compared to currently accepted values.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Multidisciplinary Sciences
Hannah K. Clause, Katharina A. Domnanich, Chloe Kleinfeldt, Morgan Kalman, Wesley Walker, Chirag Vyas, E. Paige Abel, Gregory W. Severin
Summary: This study demonstrates the feasibility of gas-phase isotope harvesting from irradiated accelerator cooling-water and successfully collects Kr-76 and Kr-77 to generate Br-76 and Br-77. This technology has the potential for wider applications.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
G. W. Severin, J. Fonslet, L. K. Kristensen, C. H. Nielsen, A. Jensen, A. Kjaer, A. P. Mazar, K. Johnston, U. Koster
Summary: This study used radiotracers to investigate the behavior of antibody ATN-291 in mice, and found no redistribution of radiotracers in tumor tissue, indicating that Nd-140 and Ce-134 could be potential PET-diagnostic matches for therapeutic radionuclides.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Katharina A. Domnanich, Gregory W. Severin
Summary: During the interaction between heavy-ion beams and beam-dump water, a wide variety of radionuclides are generated. In this study, the formation of hydrogen peroxide, molecular hydrogen, and molecular oxygen during high-intensity proton irradiation of a flowing-water isotope-harvesting target is investigated. The results show that homogeneous phase reactions have a significant impact on the overall chemical composition of the water in the high beam intensity regime.
Article
Chemistry, Inorganic & Nuclear
Jake A. Bence, Samridhi Satija, Katharina A. Domnanich, John D. Despotopulos, E. Paige Abel, Hannah K. Clause, Scott Essenmacher, Morgan Kalman, Chloe Kleinfeldt, Kelly N. Kmak, Tashi Parsons-Davis, Chirag K. Vyas, Wesley Walker, Nicholas D. Scielzo, Gregory W. Severin, Jennifer A. Shusterman
Summary: The viability of Zr-88 harvesting from solid components was investigated, and it was found that the recovery rate using solid-phase harvesting was over three times higher than in previous aqueous-phase experiments.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Multidisciplinary
Katharina A. Domnanich, Gregory W. Severin
Summary: At the Facility for Rare Isotope Beams (FRIB), interactions between heavy-ion beams and beam-dump water generate various radionuclides that can be obtained through isotope harvesting. However, irradiation of water leads to the formation of multiple radiolysis products. This study investigates the formation of hydrogen peroxide, molecular hydrogen, and molecular oxygen during high-intensity proton irradiation of a flowing-water isotope-harvesting target through experiments and simulations.
Article
Physics, Nuclear
Jennifer A. Shusterman, Nicholas D. Scielzo, E. Paige Abel, Hannah K. Clause, Nicolas D. Dronchi, Wesley D. Frey, Narek Gharibyan, Jason A. Hart, C. Shaun Loveless, Sean R. McGuinness, Logan T. Sutherlin, Keenan J. Thomas, Suzanne E. Lapi, J. David Robertson, Mark A. Stoyer, Eric B. Norman, Graham F. Peaslee, Gregory W. Severin, Dawn A. Shaughnessy
Summary: Isotope harvesting is a method to collect long-lived radioisotopes for subsequent research. The study demonstrated the process of collecting Zr-88 and Y-88 from a water target and using them for neutron-capture cross-section measurements. The results showed good agreement with previous findings and revealed the largest resonance integral measured for Zr-88.
Article
Chemistry, Multidisciplinary
Katharina A. Domnanich, Chirag K. Vyas, E. Paige Abel, Colton Kalman, Wesley Walker, Gregory W. Severin
NEW JOURNAL OF CHEMISTRY
(2020)
