bluuebunny/crossref_metadata_2025_split huggingface dataset:
Semi-empirical evaluation of isospin mixing from forbidden E1 transitions
Authors: Bisoi Abhijit , Sapkota Y. , Sarkar S. , Saha Sarkar M. 
Published: September 2023

Abstract
ΔT = 0 electric dipole transitions in self conjugate nuclei, forbidden by isospin selection rules, are readily seen in nature. This implies that the states participating in these transitions may not be of pure isospin T. This work identifies some of these transitions in a few upper-sd shell self-conjugate nuclei and attempts to calculate the degree of isospin mixing in these nuclei by using the standard two-level mixing formalism in a semi-empirical approach. The physically observed E1 transitions are broken down into two theoretically allowed ΔT = 1 channels. These allowed components have been calculated within the shell model. Our results are consistent with both theoretical and experimental values found in the literature.
Nuclear-structure experiments at iThemba LABS to investigate discrepancies between (p, p′) and (γ, xn) data
Authors: Donaldson L M , Adsley P , Banu A , Bassauer S , Bastin B , Bertulani C A , Brümmer J W , Carter J , Cooper G R J , Fearick R W , Förtsch S V , Fujita H , Fujita Y , Hammache F , Harakeh M N , Henderson J , Jingo M , Jivan H , Kheswa B V , Kheswa N Y , Kleinig W , Kureba C O , Kvasil J , Latif M , Li K C W , Meyer A , Mira J P , Nemulodi F , Nesterenko V O , von Neumann-Cosel P , Neveling R , Papka P , Pellegri L , Pietralla N , Richter A , Yu Ponomarev V , Rebeiro B , Reinhard P -G , de Séréville N , Sideras-Haddad E , Smit F D , Smith M K , Swartz J A , Tamii A , Usman I T 
Published: September 2023

Abstract
The iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) is a centre of expertise and innovation in the field of nuclear-structure physics and is a leader in several high-impact studies. One of the highlights of these nuclear-structure experiments is the study of the broad structure of the IsoVector Giant Dipole Resonance (IVGDR) in the rare-earth region. Proton inelastic scattering experiments with Ep
= 200 MeV were performed on the even-even Nd isotope chain and 152Sm at very forward scattering angles including zero degrees with the K600 magnetic spectrometer. The evolution of the shape of the IVGDR in the transition from spherical to deformed nuclei was investigated. One of the goals of this highlighted study was to confirm the K-splitting observed in previous photo-absorption measurements from Saclay. Significant discrepancies were found between the direct (γ, xn) data obtained at Saclay and the equivalent photo-absorption cross sections obtained using (p, p′) data from the K600. Furthermore, discrepancies exist for several nuclei between photo-absorption data taken at the Saclay and Livermore laboratories. These discrepancies, possible reasons for them and future investigations will be presented and discussed.
Gamma-ray spectroscopy of exotic neutron-rich nuclei in the doubly magic 132Sn region
Authors: Parry T , Armstrong M , Podolyák Zs , Górska M , Acosta J , Chen Z Q , Jungclaus A , Wimmer K , Doornenbal P , Aoi N , Baba H , Bartram G , Browne F , Campbell C , Crawford H , De Witte H , Fransen C , Hess H , Iwazaki S , Kim J , Kohda A , Koiwai T , Mauss B , Moon B , Reiter P , Suzuki D , Taniuchi R , Thiel S , Tostevin J A , Yamamoto Y , Yaneva A , Yuan C 
Published: September 2023

Abstract
An experiment with the aim to obtain information on the excited states of neutron-rich nuclei with N~82 was performed at RIBF/RIKEN as part of the HiCARI campaign. The method to identify nuclei on ion-by-ion basis, including charge-state identification, is presented. The Doppler correction technique was validated using the test case of 131In, based on the prompt πp3/2 → πp1/2
transition at 988 keV. Preliminary analysis of the 130Cd spectrum is also presented.
Study of the d(d, p)
3H and d(d, n)
3He processes at low energies
Authors: Viviani M. , Girlanda L. , Kievsky A. , Logoteta D. , Marcucci L.E. 
Published: September 2023

Abstract
The processes d(d, p)
3H and d(d, n)
3 He at energies of interest for energy production and for big-bang nucleosynthesis are studied using the hyperspherical harmonic method. The interactions include modern two- and three-nucleon interactions, derived in chiral effective field theory. We report results for the astrophysical S-factor and the quintet suppression factor.
24Mg + 12C fusion reaching the no coupling limit far below the barrier
Authors: Del Fabbro M , Montagnoli G , Stefanini A M , Jiang C L , Hagino K , Niola F , Brugnara D , Čolović P , Colucci G , Corradi L , Depalo R , Fioretto E , Goasduff A , Pasqualato G , Scarlassara F , Szilner S , Zanon I 
Published: September 2023

Abstract
In the present work the fusion cross section of the 12C+24Mg system has been measured down to energies far below the coulomb barrier around 4μb. This system is slightly heavier than those of astrophysical interest, like 12C+12C and 16O+16O. The data points highlight the presence of hindrance in 12C+24Mg because the excitation function is over-estimated by standard Coupled-Channels calculations, and a clear maximum of the S factor has been observed. The cross section at hindrance threshold is found to be remarkably large (σ ≈0.75mb). The S-factor maximum is nicely fitted using both an empirical interpolation in the spirit of the adiabatic model, and the hindrance parametrisation. The data far below the barrier may suggest that the coupling strengths gradually decrease and vanish, so that the excitation function seems to be well reproduced by a simple one-dimensional tunnelling through the potential barrier in that energy range. On the other hand, the equally good fit obtained with the hindrance model, indicates that discriminating between the two approaches would require further precise measurements at slightly lower energies.
Pygmy dipole resonances: open problems
Authors: Lanza E. G. , Pellegri L. , Vitturi A. , Andrés M. V. 
Published: September 2023

Abstract
The low-lying dipole states, known as Pygmy Dipole Resonances (PDR) have been studied at length for several nuclei and several isotopes. Many properties have been acquired and understood by the theoretical and experimental studies of the isovector and isoscalar response of the PDR. Nevertheless, some unresolved questions still remain and two of them are briefly discussed in this contribution: the long standing question about the collective nature of this new mode and the presence of the PDR in deformed nuclei.
Investigations of the structures of the Ru isotopes: 98Ru
Authors: Garrett P.E. , Makhathini L. , Bark R.A. , Rodríguez T.R. , Valbuena S. , Bildstein V. , Bucher T.D. , Burbadge C. , Dubey R. , Faestermann T. , Hertenberger R. , Kamil M. , Lawrie E.A. , Leach K.G. , MacLean A.D. , Mehl C. , Mthembu S.H. , Mukwevho N.J. , Ngwetsheni C. , Ntshangase S.S. , Nzobadila Ondze J.C. , Rebeiro B. , Singh B. , Triambak S. , Vyfers E. , Wirth H.-F. 
Published: September 2023

Abstract
As part of a systematic study of the nuclear structure of the Ru isotopes, 98Ru was investigated via the β-decay of 98Rh at iThemba LABS, and the 100Ru(p, t) reaction at the Maier-Leibnitz Laboratory. The combined data results in significant revision of the previous spin assignments and clarification of the nature of levels in 98Ru, as well as providing insights into the evolution of the structures across the Ru isotopic chain.
Progress in Nuclear Astrophysics: a multi-disciplinary field with still many open questions
Authors: Goriely S , Choplin A , Ryssens W , Kullmann I 
Published: September 2023

Abstract
Nuclear astrophysics is a multi-disciplinary field with a huge demand for nuclear data. Among its various fields, stellar evolution and nucleosynthesis are clearly the most closely related to nuclear physics. The need for nuclear data for astrophysics applications challenges experimental techniques as well as the robustness and predictive power of present nuclear models. Despite impressive progress for the last years, major problems and puzzles remain. In the present contribution, only a few nuclear astrophysics specific aspects are discussed. These concern some experimental progress related to the measurement of key reactions of relevance for the so-called s-and p-processes of nucleosynthesis, the theoretical effort in predicting nuclear properties of exotic neutron-rich nuclei of interest for the r-process nucleosynthesis, and the recent introduction of machine learning techniques in nuclear astrophysics applications.
Searching optimum equations of state using internal magnetic fields with various shapes
Authors: Watanabe Chinatsu , Yoshinaga Naotaka , Ebata Shuichiro 
Published: September 2023

Abstract
Neutron stars (NSs) are highly magnetized rotating compact stars. Recently, three NSs around twice the solar mass have been found. Such massive NSs give strong constraints on equations of state (EoSs) of NS matter. In this study, we calculate masses and radii of NSs and compare them with the observed masses and radii of two NSs and the radius of a NS with 1. 4 M
⊙ for various EoSs with internal magnetic fields. In our calculation, to investigate the optimum EoS for the neutron matter with a strong magnetic field, we calculate the total masses and radii of NSs by changing the internal magnetic fields formulated by four free parameters. The predictions by several EoSs come into the range determined by observational constraints if suitable values of these free parameters are chosen.
Research on Emerging Medical radionuclides from the X-sections (REMIX): The Accelerator-based Production of 47Sc, 149Tb, 152Tb, 155Tb and 161Tb
Authors: Pupillo G , Anselmi-Tamburini U , Barbaro F , Bello M , Bortolussi S , Boschi A , Campostrini M , Canton L , Carante M P , Cazzola E , Cisternino S , Colombi A , Colucci M , Dominicis L De , Nardo L De , Duatti A , Fontana A , Gorgoni G , Groppi F , Haddad F , Manenti S , Martini P , Meléndez-Alafort L , Mou L , Nigron E , Rigato V , Sciacca G , Esposito J 
Published: September 2023

Abstract
The REMIX project is focused on the cyclotron-based production of 47Sc, 149Tb, 152Tb, 155Tb and 161Tb radionuclides, whose decay characteristics make them suitable for medical applications. This work will outline the main results achieved withing the REMIX collaboration, that is organized in the following Work Packages (WP): WP1. Target manufacturing (49Ti, 50Ti and 155Gd2O3) and characterization; WP2. Nuclear cross section (XS) measurements with 49Ti and 50Ti targets for 47Sc production; WP3. Nuclear XS measurements with natDy, 159Tb and natEu targets for xxTb production; WP4. Nuclear XS modeling for 47Sc and 155Tb production; WP5. Dosimetric calculations for 47Sc- and xxTb-labelled radiopharmaceuticals; WP6. 155Tb Thick Target Yield (TTY) measurements; WP7. Apparatus design and realization for irradiation tests with the LARAMED beamline. Since the LARAMED bunkers and ancillary laboratories are currently under completion at the INFN-LNL, the nuclear XS experiments are carried out in collaboration with the GIP ARRONAX facility (Saint-Herblain, France) and the Thick Target Yield (TTY) measurements are performed at the Sacro Cuore Don Calabria hospital (SCDCh, Negrar, Verona, Italy).
Directionality for nuclear recoils in a Liquid Argon TPC
Authors: Sanfilippo S , Agnes P , Ahmad I , Albergo S , Albuquerque I , Ave M , Bonivento W M , Bottino B , Cadeddu M , Caminata A , Canci N , Cappello G , Caravati M , Cataudella V , Cesarano R , Cicalò C , Covone G , Candia A de , Filippis G De , Rosa G De , Davini S , Dionisi C , Dolganov G , Fiorillo G , Franco D , Galbiati C , Gulino M , Ippolito V , Kemmerich N , Kimura M , Kuss M , Commara M La , Li X , Mari S M , Martoff C J , Matteucci G , Oleynikov V , Pallavicini M , Pandola L , Pino N , Rescigno M , Rode J , Sosa A , Suvorov Y , Testera G , Tricomi A , Wada M , Wang H , Wang Y , Zakhary P 
Published: September 2023

Abstract
Directional sensitivity to nuclear recoils would provide a smoking gun for a possible discovery of dark matter in the form of WIMPs (Weakly Interacting Massive Particles). A hint of directional dependence of the response of a dual-phase argon Time Projection Chamber (TPC) was found in the SCENE experiment. Given the potential importance of such a capability in the framework of dark matter searches, a new dedicated experiment, ReD (Recoil Directionality), was designed by the Global Argon Dark Matter Collaboration, in order to scrutinise this hint. A small dual-phase argon TPC was irradiated with neutrons produced by the p(7Li,7Be)n reaction using the 15 MV TANDEM accelerator of the INFN - Laboratori Nazionali del Sud, Catania, Italy, so as to produce argon nuclear recoils in the range (20 - 100) keV of interest for dark matter searches. Energy and direction of nuclear recoils are inferred by the detection of the elastically-scattered neutron by a set of scintillation detectors. Events were selected by gating of the associated 7Be, which is detected by a telescope of Si detectors.
Digital data acquisition for fast neutron metrology: defining the digital light output parameter
Authors: Buffler A , Babut R , Gressier V , Hutton T , Leadbeater T , Petit M , Sole C 
Published: September 2023

Abstract
The application of a CAEN DT5730 digitizer unit for fast neutron metrology and applications has been explored. The standard methods implemented to obtain a calibrated light output parameter from the integrated anode output has a high sensitivity to the selection of pulse integration time. We report on measurements made at the n-lab within the Department of Physics at the University of Cape Town which explored alternative approaches to determining the light output parameter with the digital acquisition system, aiming for a high degree of consistency.
Micro-scale particle tracking using hybrid detectors
Authors: van der Merwe R , Peterson S , Buffler A , van Heerden M , Hyslop N , Hutton T , Leadbeater T 
Published: September 2023

Abstract
Positron Emission Particle Tracking (PEPT) techniques allow the tracking of a radioactive tracer particle moving within a system of flow, enabling non-invasive study of dynamic systems. On the micro-scale, PEPT performance is limited by the achievable activity in radiolabelling a suitable tracer particle, and the fixed geometry of conventional detector systems. To enable application of PEPT towards these scales advanced instrumentation is required, and a hybrid detection system has been developed combining scintillator and semiconductor devices. A bismuth germanate oxide (BGO) scintillator array consisting of 1024 detector elements derived from CTI/Siemens PET scanners (512 pixels of 6.75 x 6.25 x 30 mm3 and 512 pixels of 4.1 x 4.0 x 30 mm3) forms a field of view of 150 x 196 x 101 mm3. A pair of pixelated cadmium zinc telluride room temperature semiconductors (9680 pixels of 1.8 x 1.8 x 0.5 mm3) form a high spatial resolution region of 62 x 42 x 20 mm3 placed within the larger field of view. The design choice maximizes absolute efficiency by merit of the scintillators and enhances spatial resolution through the semiconductors. Energy and timing resolutions of the BGO elements were determined, and sensitivity profiles of the system modelled numerically, enabling the characterization of the system absolute efficiency and spatial resolution. The results suggest the applicability of PEPT in the study of microscale flows for the first time, including investigating flows in capillaries and micro-fluidic devices.
Dynamics of physical flows measured by positron emission techniques
Authors: Leadbeater T , Buffler A , Peterson S , Hutton T , van Heerden M , Camroodien A , van der Merwe R , Hyslop N , McKnight A 
Published: September 2023

Abstract
Short lived positron emitting species are used to produce flow-following tracer particles to study flow dynamics in a technique known as positron emission particle tracking (PEPT). The photon pairs produced by positron annihilation are detected in time coincidence by arrays of high-speed position sensitive detectors. Reconstruction of consecutive annihilations are used to determine the near-instantaneous position of the tracer particle. Hence, the resulting bulk flow dynamics are derived, including residence times, velocities, accelerations, and related kinematic properties. The Department of Physics at the University of Cape Town uses PEPT to study dynamic physical processes, turbulent, and multiphase flows. Studies aim to address global challenge topics including problems in water scarce environments, reducing industrial wastes, and enhancing developments towards sustainable economies through improved process efficiencies and design led approaches. The PEPT Cape Town enterprise is discussed, including the development of flow metrology systems and complementary nuclear measurement techniques. Research encompasses four key themes: radioisotope tracer production, instrumentation & detector development, data acquisition & processing, and flow metrology.
First usage of Intra-Nuclear Cascade of Liège (INCL) model for nuclear transport of protons from neutrino-nucleus scattering
Authors: Ershova Anna 
Published: September 2023

Abstract
Neutrino oscillation physics enters the precision era, and the modeling of neutrino-nucleus interactions constitutes a challenging source of systematic uncertainty for such measurements. A new generation of detectors is being developed to measure the complete (exclusive) final state of particles resulting from neutrino interactions. To fully benefit from the improved detector capabilities, precise simulations of the nuclear effects on the final-state nucleons are needed. We have employed the Intra-Nuclear Cascade of Liège model to simulate the propagation of hadrons through the nuclear medium after the neutrino interaction to address this problem. We present a characterization of the hadronic final state after Final State Interactions (FSI) and comparisons to available measurements of transverse kinematic imbalance. The study presented here [1] is a crucial milestone towards the precise simulation of final state interactions in neutrino-nucleus interactions and a complete estimation of related uncertainties.
JUNO Experiment: Current Status and Physics
Authors: Liu Runxuan ,   on behalf of the
Published: September 2023

Abstract
JUNO is a 20 kt liquid scintillator detector located ∼650 m underground in Jiangmen, China. The construction will be finished in 2023. Its energy resolution can reach 3% at 1 MeV, which allows it to realize its main goal of determining the neutrino mass ordering (NMO) detecting antineutrinos from two nuclear power plants at 53 km baseline. Mass ordering is expected to have 3 σ of significance in 6 years of data taking. Meanwhile the measurement of oscillation parameters sin2
θ
12,

Δ

m

21

2

, and

|

Δ

m

32

2

|

will reach sub-percent precision. The Taishan Antineutrino Observatory will be placed ∼30 m from the core of one power plant, in order to measure the reactor antineutrino spectrum, as a reference spectrum for the determination of NMO in JUNO, with resolution better than 2% at 1 MeV. The OSIRIS pre-detector is designed to monitor the LS of JUNO during the several months of filling. With its massive LS volume and excellent energy resolution, JUNO will be able to explore many other neutrino, astro, and particle physics topics. For example, detection of supernova neutrinos, atmospheric neutrinos, solar neutrinos, and geoneutrinos. This paper reviews the current status of JUNO and introduces recent studies on JUNO’s potential in many different physics topics.
Study of weak magnetism by precision spectrum shape measurements in nuclear beta decay
Authors: Rozpedzik D , De Keukeleere L , Bodek K , Hayen L , Lojek K , Perkowski M , Severijns N 
Published: September 2023

Abstract
Nuclear beta decays play an important role in uncovering the nature of the weak interaction. The weak magnetism (WM) form factor, b
WM, is generally a small correction to the beta decay rate that arises at first order as an interference term between the dominant Gamow-Teller and the magnetic dipole contributions to the weak current. This form factor is still poorly known for nuclei with higher atomic number. We performed a careful analysis of the measured beta spectrum shape for Gamow-Teller transitions in 114In and 32P nuclei. The precision spectrum shape measurements were carried out using the miniBETA spectrometer consisting of a low-mass, low-Z multi-wire gas tracker and a plastic scintillator energy detector. The preliminary results for the weak magnetism extraction for 114In and 32P nuclei are presented.
Detection of recoil ion in the beta decay of laser oriented trapped radioactive isotopes for the MORA Project
Authors: Goyal Nishu , Daumas-Tschopp Sacha , De Oliveira Santos Francois , Delahaye Pierre , Flechard Xavier , Fontbonne Jean Marc , Lienard Etienne , Motilla Luis Miguel , Perronnel Jerome , Quemener Gilles , Singh Abhilasha 
Published: September 2023

Abstract
The Matter’s Origin from RAdioActivity (mora) project focuses on ion manipulation in traps and laser orientation methods for the searches of New Physics (np) in nuclear beta decay by precisely measuring the D correlation parameter. We predominantly have focussed here on the detection configuration of mora and alongside talked in detail about the Recoil Ion DEtection system (ride) and its characterization focusing mainly on the methods applied to achieve high order position correction.
Radiation protection basis of design for the South African isotope facility - SAIF
Authors: Beukes P R , Barnard A H , Strydom I L , Azaiez F , Wiedeking M 
Published: September 2023

Abstract
To expand on its research agenda and meet the growing demand for nuclear medicine products, the South African Isotope Facility (SAIF) was launched. This study focuses on Radiation Protection aspects for SAIF Phase 1, specifically the verification of existing- and basis of design for supplementary engineering controls for the retrofitted accelerator complex, housing an IBA C70 Cyclone 70 MeV H-minus cyclotron and four in-house designed high intensity particle beam target stations. For the dosimetric assessment, a selection of calibrated instruments were used to determine the ambient dose equivalent rate H*(10) at points of interest. Physical dose rate measurements were performed for various source terms (66 MeV p+ on Cu, Al, Mg, Ga and Li) and beam intensities up to tens of micro Amperes, beyond in-situ bulk shielding material, for compound shielded target stations and streaming through existing labyrinths. Comparisons are drawn between actual measurements and the FLUKA code. Primarily to determine the in-situ shielding characteristics of unverified bulk shielding material cast in the 1980s, as core drill samples yielded vastly divergent aggregate types and material densities.