Wed·May 22, 2024Wednesday·May 22, 2024

1. 01*

   Electric field induction in quark-gluon plasma due to thermoelectric effects

   Kamaljeet Singh🇮🇳 · Jayanta Dey🇮🇳 · Raghunath Sahoo🇮🇳

   Relativistic heavy-ion collisions produce quark-gluon plasma (QGP), which is locally thermalized. Due to electrically charged particles (quarks), QGP exhibits interesting thermoelectric phenomena during its evolution, resulting in an electromagnetic (EM) field in the medium. In this study, for the first time, we estimate the induced electric field in QGP due to the thermoelectric effect. This phenomenon can induce an EM field even in QGP produced by the head-on heavy-ion collision. In peripheral heavy-ion collisions, the presence of a spectator current generates a transient magnetic field at the early stage, which disrupts the isotropy of the induced electric field. For the numerical estimation, we use a quasiparticle-based model that incorporates the lattice quantum chromodynamics equation of state for QGP. The induced electric field is estimated with cooling rates derived from Gubser hydrodynamic flow. Thermoelectric coefficients such as Seebeck, magneto-Seebeck, and Nernst coefficients play a crucial role in determining the induced field. Additionally, we account for the temperature evolution of QGP using different hydrodynamic cooling rates to calculate the transport coefficients. We also estimate the transport coefficients and the induced electric field in the presence of an external time-varying magnetic field, including the quantum effect of Landau quantization, and explore the effects of the intensity and decay parameter of the magnetic field on the induced electric field. Our findings reveal that the space-time profile of the induced electric field is zero at the center and increases as we go away from the center. During the early stages of evolution, the electric field can reach a maximum value of $eE\approx 1m_{\pi }^2$, decreasing in strength over time.

   ↳ hep-phhep-exhep-thnucl-ex+1PRD(2024)·16 citations
2. 02*

   Prompt fission neutron spectra of 240Pu(n, F)

   V.M. Maslov

   Variation of fission neutron spectra of 240Pu (sf) and 240Pu (n, F) for E up to 20 MeV predicted.Features of angle-integrated prompt fission neutron spectra of 240Pu (n, F) stem from simultaneous analysis of data for 238U (n, F), 239Pu (n, F) and available data on 240Pu (n, F) prompt fission neutron spectra.The data on average energies of 240Pu (n, F) prompt fission neutron spectra support the approach pursued in case of 238U (n, F) and 239Pu (n, F). Soft influence of exclusive neutron spectra on prompt fission neutron spectra observed in case of 240Pu (n, F) and 240Pu (n, xnf) at E = 7-8 MeV. The largest relative amplitude of exclusive neutron spectra 240Pu (n, xnf) is envisaged at E = 6-6.25 MeV. Prompt fission neutron spectra of 240Pu (n, F) are harder than those of 238U (n,F), but softer than prompt fission neutron spectra for 239Pu(n, F). 240Pu (n, F) prompt fission neutron spectra 240Pu shape is rather close to that of 239Pu(n, F), though the contribution of pre-fission neutrons is relatively higher. Exclusive neutron spectra (n, xnf) are consistent with (n,F) cross sections of 237-240Pu(n, F), as well as neutron emissive spectra of 239Pu(n, xn) at E = 14 MeV. We predict the exclusive pre-fission neutron spectra, exclusive neutron spectra of (n,xn) reactions, average total kinetic energy TKE of fission fragments and products, partials of of average prompt fission neutron number and observed prompt fission neutron spectra.

   ↳ nucl-thnucl-ex0 citations
3. 03*

   Kaonic lead feasibility measurement at DA{\Phi}NE to solve the charged kaon mass discrepancy

   D. Bosnar🇭🇷 · L. Abbene🇮🇹 · C. Amsler🇦🇹 · F. Artibani🇮🇹 · M. Bazzi🇮🇹 · M. Bragadireanu🇷🇴 · A. Buttacavoli🇮🇹 · M. Cargnelli🇦🇹 · M. Carminati🇮🇹 · A. Clozza🇮🇹 · F.Clozza🇮🇹 · G. Deda🇮🇹 and 30 other authors

   An HPGe detector equipped with a transistor reset preamplifier and readout with a CAEN DT5781 fast pulse digitizer was employed in the measurement of X-rays from kaonic lead at the DA$\Phi$NE $e^{+}{e}^{-}$ collider at the Laboratori Nazionali di Frascati of INFN. A thin scintillator in front of a lead target was used to select kaons impinging on it and to form the trigger for the HPGe detector. We present the results of the kaonic lead feasibility measurement, where we show that the resolution of the HPGe detector in regular beam conditions remains the same as that without the beam and that a satisfactory background reduction can be achieved. This measurement serves as a test bed for future dedicated kaonic X-rays measurements for the more precise determination of the charged kaon mass.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2024)·4 citations
4. 04*

   Fluorescence Imaging of Individual Ions and Molecules in Pressurized Noble Gases for Barium Tagging in ${}^{136}$Xe

   NEXT Collaboration: N. Byrnes🇺🇸 · E. Dey🇺🇸 · F.W. Foss🇺🇸 · B.J.P. Jones🇺🇸 · R. Madigan🇺🇸 · A. McDonald🇺🇸 · R.L. Miller🇺🇸 · K.E. Navarro🇺🇸 · L.R. Norman🇺🇸 · D.R. Nygren🇺🇸 · C. Adams🇺🇸 · H. Almazán🇬🇧 and 102 other authors

   The imaging of individual Ba${}^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba${}^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba${}^{2+}$ ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1$\times$1~cm${}^2$ located inside 10~bar of xenon gas. This new form of microscopy represents an important enabling step in the development of barium tagging for neutrinoless double beta decay searches in ${}^{136}$Xe, as well as a new tool for studying the photophysics of fluorescent molecules and chemosensors at the solid-gas interface.

   ↳ physics.ins-dethep-exnucl-exNature Commun.(2024)·5 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.