Fri·Jul 14, 2017Friday·July 14, 2017

1. 01*

   Deep-inelastic multinucleon transfer processes in the ${}^{16}$O+${}^{27}$Al reaction

   B. J. Roy🇮🇳 · Y. Sawant · P. Patwari · S. Santra🇮🇳 · A. Pal · A. Kundu · D. Chattopadhyay · V. Jha · S. K. Pandit🇮🇳 · V. V. Parkar🇮🇳 · K. Ramachandran🇮🇳 · K. Mahata🇮🇳 and 7 other authors

   The reaction mechanism of deep-inelastic multinucleon transfer processes in the ${}^{16}$O+${}^{27}$Al reaction at an incident ${}^{16}$O energy ($E_{\mathrm{lab}}=134$ MeV) substantially above the Coulomb barrier has been studied both experimentally and theoretically. Elastic-scattering angular distribution, total kinetic energy loss spectra and angular distributions for various transfer channels have been measured. The $Q$-value- and angle-integrated isotope production cross sections have been deduced. To obtain deeper insight into the underlying reaction mechanism, we have carried out a detailed analysis based on the time-dependent Hartree-Fock (TDHF) theory. A recently developed method, TDHF+GEMINI, has been applied to evaluate production cross sections for secondary products. From a comparison between the experimental and theoretical cross sections, we find that the theory qualitatively reproduces the experimental data. Significant effects of secondary light-particle emissions are demonstrated. Possible interplay between fusion-fission, deep-inelastic, multinucleon transfer and particle evaporation processes are discussed.

   nucl-exnucl-thPRC(2018)·12 citations
2. 02*

   Sensitivity of jet substructure to jet-induced medium response

   José Guilherme Milhano🇵🇹 · Urs Achim Wiedemann🇨🇭 · Korinna Christine Zapp🇨🇭

   Jet quenching in heavy ion collisions is expected to be accompanied by recoil effects, but unambiguous signals for the induced medium response have been difficult to identify so far. Here, we argue that modern jet substructure measurements can improve this situation qualitatively since they are sensitive to the momentum distribution inside the jet. We show that the groomed subjet shared momentum fraction $z_g$, and the girth of leading and subleading subjets signal recoil effects with dependencies that are absent in a recoilless baseline. We find that recoil effects can explain most of the medium modifications to the $z_g$ distribution observed in data. Furthermore, for jets passing the Soft Drop Condition, recoil effects induce in the differential distribution of subjet separation $\Delta R_{12}$ a characteristic increase with $\Delta R_{12}$, and they introduce a characteristic enhancement of the girth of the subleading subjet with decreasing $z_g$. We explain why these qualitatively novel features, that we establish in \textsc{Jewel+Pythia} simulations, reflect generic physical properties of recoil effects that should therefore be searched for as telltale signatures of jet-induced medium response.

   ↳ hep-phnucl-exnucl-thPLB(2018)·111 citations
3. 03*

   The Edwards Accelerator Laboratory at Ohio University

   Zach Meisel🇺🇸 · C. R. Brune🇺🇸 · S. M. Grimes · D. C. Ingram · T. N. Massey🇺🇸 · A. V. Voinov🇺🇸

   The Edwards Accelerator Laboratory at Ohio University is the hub for a vibrant program in low energy nuclear physics. Research performed with the lab's 4.5MV tandem accelerator spans a variety of topics, including nuclear astrophysics, nuclear structure, nuclear energy, homeland security, and materials science. The Edwards Lab hosts a variety of capabilities, including unique features such as the beam swinger with neutron time-of-flight tunnel and the integrated condensed matter physics facility, enabling experiments to be performed with low-to-medium mass stable ion beams using charged-particle, gamma, and neutron spectroscopy. This article provides an overview of the current and near-future research program in low energy nuclear physics at Ohio University, including a brief discussion of the present and planned technical capabilities.

   ↳ physics.ins-detnucl-exPhys.Procedia(2017)·17 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.