Physics of Particles and Nuclei Letters This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Model for the Conversion of Beta Spectra from Fission Products of Uranium and Plutonium Isotopes into Antineutrino Spectra
AbstractA technique is developed for reconstructing reactor antineutrino spectra from fission products of uranium and plutonium isotopes. Cumulative antineutrino spectra of\(^{{235}}{\text{U}}\),\(^{{239}}{\text{Pu}}\), and\(^{{241}}{\text{Pu}}\) thermal-neutron fission products and\(^{{238}}{\text{U}}\) fast-neutron fission products are calculated using the presented reconstruction algorithm and the cumulative beta spectra measured at the Institut Laue –Langevin, Technical University of Munich, and National Research Center “Kurchatov Institute.” Approximations used in the model are described, errors of the results a...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Radiobiological Effects of the Combined Action of 1- β-D-Arabinofuranosylcytosine and Proton Radiation on B16 Melanoma in vivo
AbstractTaking into account the previously obtained data on the ability of 1- β-D-arabinofuranosylcytosine (AraC) to significantly increase the number of DNA double-strand breaks after cell culture exposure to ionizing radiation in vitro, the aim of this study was to evaluate the combined action of this compound and proton radiation at a focal dose of 10 Gy on of B16 melanoma growth and a number of processes associated with the radiation response of the tumor —in comparison with those after single irradiation with a proton beam in vivo. Significant tumor growth inhibition was established in both groups of irradiated an...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Color Screening from Flux Tube in (2 + 1)-Flavour QCD
In this study, we analyse the dependence of the penetration length and the effective mass, the flux tube width and the free energy on temperature and\(q\bar {q}\) separation. From the results of the non-vanishing penetration length and effective mass, we observe screening of the color electric field. The free energy exhibits that the screening phenomenon depends on interquark distance and temperature. For width of the flux tube, we observe quantum widening up to\(R = 1.5\) fm at all temperatures which are in close vicinity to the deconfinement transition temperature\({{T}_{{\text{c}}}}\). (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Modeling Coupling and Its Correction in Siberian Circular Photon Source
AbstractUsing the MADX options, the stages of orbit correction and then optics correction were simulated, taking into account the specified tolerances for the positioning of magnetic elements and girders in the Siberian Circular Photon Source (SKIF, the Russian acronym). Numerical modeling of hte effect of residual perturbations of the guide field on the vertical emittance and vertical size of the beam has been carried out. A generalized method of skew-quadrupole coupling correction in SKIF has been developed and verified by simulation, which allows simulteneously minimizing the vertical dispersion and compensating for the...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Investigation of Single Proton Knockout from 26P Nucleus on 9Be Target at 65 MeV/n Beam Energy
AbstractSingle proton knockout from proton-rich26P nucleus has been investigated theoretically at 65  MeV/n beam energy on9Be target for stripping and diffraction dissociation mechanisms using Eikonal approximation. The single proton breakup cross sections, longitudinal and transverse momentum distribution of core fragment are calculated using MOMDIS code. Ground as well as recently observed projectile and core excited states are taken into consideration for qualitative examination of their effects on the single proton breakup cross section and full width half maxima (FWHM) width of momentum distribution. The proton break...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Cross Energy and Anisotropy of Prompt Atmospheric Neutrino and Muon Fluxes
AbstractWe have performed a novel calculation of the “prompt” component of atmospheric leptons—muon neutrinos and muons arising in the decays of charmed particles. The same model of the hadron cascade is used in our calculation as in the calculation of the characteristics of “conventional” atmospheric neutrinos and muons (from the decays of π,K-mesons). The cross sections for the production of the charmed hadrons (D, Λc) in pA and πA collisions are calculated within the quark–gluon string model (QGSM), whose parameters have taken into account recent measurements of cross sections of the charmed meson product...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Calculation of the Magnet of the MAVR Spectrometer and Proposals for Its Modernization
AbstractCalculations have been made for the existing magnet of the MAVR spectrometer and the results are compared with experimental data. A model of a new magnet is proposed that makes it possible to increase the maximum magnetic rigidity of particles up to 2.5 T m. The quality of focusing of beams of different rigidity onto the plane of the detectors for two models is compared. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Cherenkov Radiators Based on Diamond and Corundum Crystals
AbstractThe Vavilov –Cherenkov effect is a well-known phenomenon widely used in various fields, including the diagnostics of charged particle beams. The possibility of separating Vavilov–Cherenkov radiation (VCR) and luminescent light is critical for the development of a new generation of optical methods in the dia gnostics of low-energy beams. This paper presents the first experimental results on the detection of VCR from an electron beam with an energy of 5.7 MeV passing through diamond and corundum (sapphire) crystals. It is shown that Cherenkov and luminescent light have different glow times for a corundum crystal,...
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

Tests of the Prototype Chamber of the Cryogenic Moderator of the DARIA Compact Neutron Source
We present experimental results on the loading/unloading working fluid of the cryogenic moderator of a DARIA compact neutron source. A technology for loading liquid nonirradiated mesitylene into a specially designed prototype of the cryogenic moderator chamber and a technology for unloading irradiated mesitylene with a different absorbed dose of ionizing radiation are proposed and experimentally validated. During the experiments, the chamber prototype worked flawlessly in conditions as close as possible to real operating conditions of the cryogenic moderator of a compact neutron source. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - February 1, 2023 Category: Physics Source Type: research

The Study of Multi-Nucleon Transfer Reactions for Synthesis of New Heavy and Superheavy Nuclei
AbstractThe standard reaction methods, such as fragmentation, fission or fusion used to synthesis exotic nuclei have reached their experimental limits. Multi-nucleon transfer (MNT) reactions are discussed as the potential method to reach the still unknown region of exotic proton/neutron rich heavy and superheavy nuclei. Studies of MNT reactions to follow this goal are presently a hot topic in diverse laboratories worldwide. At the velocity filter SHIP of GSI Darmstadt, our high sensitivity lead for the first time in collisions of48Ca +248Cm to the discovery of five new isotopes withZ\( \geqslant \) 92 produced in MNT react...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research

Manifestation of Reflection-Asymmetric Deformation in the Structure of Superheavy Nuclei
AbstractThe characteristics of of alternating parity bands in transfermium nuclei withZ = 102 –110 are calculated. The energy values of the lowest negative parity states and transitional dipole, quadrupole, and octupole moments are predicted. Assessments of the critical angular momenta at which the transition from oscillatory motion to stable reflection-asymmetric deformation occurs are pe rformed. The calculations are carried out using the cluster model of a dinuclear system. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research

Investigation of Light Collection in Scintillation Cubes of the SFGD Detector
AbstractThis paper presents the results of measuring the parameters of scintillation cubes, which are elements of the active target of the upgraded near detector of the T2K experiment, with the scintillation of a polystyrene-based organic scintillator being excited by an ultraviolet LED. Most attention is paid to the study of light leaks through the side faces of the cubes. The measurement results show that an average value of the coefficient characterizing light leaks through one face of the cube is 0.026. The effect of heating scintillation cubes on the light collection from them and light leaks are studied. After keepin...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research

Restrictions Imposed by the Wave Function on the Results of Particle Momentum Measurements
AbstractIt is demonstrated with a particle in the one-dimensional configuration space (OCS) that knowledge of the wave function supposes more than statistical restrictions on the results of measurements. In particular, apart from the probability (density) field in the OCS, the wave function also suggests the existence of two fields that predict two (equiprobable) particle momentum values for each OCS point, and the average of these two momenta at each point is related only to the wave function phase, while their difference (coinciding with the Bohm quantum-mechanical potential) is related only to the wave function amplitud...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research

Flash Method of Proton Therapy
AbstractThe purpose of this review is to generalize the information available on the topic of the flash proton beam therapy method. Currently, research in this area is one of the flagships in the development of a proton therapy method for both medical centers and commercial companies that develop equipment and technologies for proton therapy. The published data on pioneering studies of proton irradiation by the flash method allow us to consider this method very promising for its development and use in medicine. At the same time, in this case, a large commercial component of this issue arises, since the promotion and develo...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research

Superluminal Particle Motion from the Hyperbolic Momentum Space Point of View
AbstractThe tachyon problem is considered on the basis of the kinematics of the extended hyperbolic space of relativistic momenta, including a two-sheet hyperboloid of momenta of subluminal particles, a cone of massless particles propagating at the speed of light, and a one-sheet hyperboloid of momenta of superluminal particles. The concept of mutually polar four-dimensional momenta is introduced. It is shown that the four-momentum corresponding to infinite velocity is polar to the rest frame on the upper part of a two-sheet hyperboloid . The Lorentz transformation is found that translates an arbitrary four-momentum of a t...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research