Thu·Apr 29, 2021Thursday·April 29, 2021

1. 01*

   Measurement of the differential cross sections of the Sigma-p elastic scattering in momentum range of 470 to 850 MeV/c

   J-PARC E40 Collaboration: K. Miwa🇯🇵 · J. K. Ahn🇰🇷 · Y. Akazawa🇯🇵 · T. Aramaki🇯🇵 · S. Ashikaga🇯🇵 · S. Callier🇫🇷 · N. Chiga🇯🇵 · S. W. Choi🇰🇷 · H. Ekawa🇯🇵 · P. Evtoukhovitch🇷🇺 · N. Fujioka🇯🇵 · M. Fujita🇯🇵 and 59 other authors

   A high statistics $\Sigma p$ scattering experiment has been performed at the J-PARC Hadron Experimental Facility. Data for momentum-tagged ${\Sigma }^{-}$ running in a liquid hydrogen target were accumulated by detecting the ${\pi }^{-}p\to K^{+}{\Sigma }^{-}$ reaction with a high intensity ${\pi }^{-}$ beam of 20 M/spill. Differential cross sections of the ${\Sigma }^{-}p$ elastic scattering were derived with a drastically improved accuracy by identifying the largest statistics of about 4,500 events from 1.72 $\times$ $10^7$ ${\Sigma }^{-}$. The derived differential cross section shows a clear forward-peaking angular distribution for a ${\Sigma }^{-}$ momentum range from 470 to 850 MeV/$c$. The accurate data will impose a strong constraint on the theoretical models of the baryon-baryon interactions.

   nucl-exPRC(2021)·58 citations
2. 02*

   Investigating neutron transfer in the ${}^9$Be + ${}^{197}$Au system

   Malika Kaushik🇮🇳 · S.K. Pandit🇮🇳 · V.V. Parkar🇮🇳 · G. Gupta🇮🇳 · Swati Thakur🇮🇳 · V. Nanal🇮🇳 · H. Krishnamoorthy🇮🇳 · A. Shrivastava🇮🇳 · C.S. Palshetkar🇮🇳 · K. Mahata🇮🇳 · K. Ramachandran🇮🇳 · S. Pal🇨🇦 · R.G. Pillay🇮🇳 · Pushpendra P. Singh🇮🇳

   In this work $\text{n}$-transfer and incomplete fusion cross sections for ${}^9$Be + ${}^{197}$Au system are reported over a wide energy range, E${}_{c.m.}$ $\approx$ 29-45 MeV. The experiment was carried out using activation technique and off-line gamma counting. The transfer process is found to be the dominant mode as compared to all other reaction channels. Detailed coupled reaction channel (CRC) calculations have been performed for $\text{n}$-transfer stripping and pickup cross sections. The measured 1$\text{n}$-stripping cross sections are explained with CRC calculations by including the ground state and the 2${}^{+}$ resonance state (E = 3.03 MeV) of ${}^8$Be. The calculations for 1$\text{n}$-pickup, including only the ground state of ${}^{10}$Be agree reasonably well with the measured cross sections, while it overpredicts the data at subbarrier energies. For a better insight into the role of projectile structure in the transfer process, a comprehensive analysis of 1$\text{n}$-stripping reaction has been carried out for various weakly bound projectiles on ${}^{197}$Au target nucleus. The transfer cross sections scaled with the square of total radius of interacting nuclei show the expected Q-value dependence of 1$\text{n}$-stripping channel for weakly bound stable projectiles.

   nucl-exnucl-thPRC(2021)·23 citations
3. 03*

   Neutron form factor measurements at MAMI

   B. S. Schlimme🇩🇪

   Measurements of the electric and the magnetic neutron form factors have been performed at the Mainz Microtron for more than 20 years. These MAMI experiments are reviewed in the context of measurements from other groups, and future measurements at MAMI are outlined.

   nucl-ex1 citation
4. 04*

   Operation and characterization of a windowless gas jet target in high-intensity electron beams

   B. S. Schlimme🇩🇪 · S. Aulenbacher🇩🇪 · P. Brand🇩🇪 · M. Littich🇩🇪 · Y. Wang🇺🇸 · P. Achenbach🇩🇪 · M. Ball🇩🇪 · J. C. Bernauer🇺🇸 · M. Biroth🇩🇪 · D. Bonaventura🇩🇪 · D. Bosnar🇭🇷 · S. Caiazza🇩🇪 and 45 other authors

   A cryogenic supersonic gas jet target was developed for the MAGIX experiment at the high-intensity electron accelerator MESA. It will be operated as an internal, windowless target in the energy-recovering recirculation arc of the accelerator with different target gases, e.g., hydrogen, deuterium, helium, oxygen, argon, or xenon. Detailed studies have been carried out at the existing A1 multi-spectrometer facility at the electron accelerator MAMI. This paper focuses on the developed handling procedures and diagnostic tools, and on the performance of the gas jet target under beam conditions. Considering the special features of this type of target, it proves to be well suited for a new generation of high-precision electron scattering experiments at high-intensity electron accelerators.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2021)·32 citations
5. 05*

   Systematic high-level design of a fifth order Continuous-Time CRFF Delta Sigma ADC

   Abderrahmane Ghimouz🇫🇷 · Fatah Rarbi🇫🇷 · Olivier Rossetto🇫🇷

   In this paper we present the development of a Systematic high level design model based on MATLAB scripts. It is integrated into a graphical behavioral model toolbox for the synthesis and simulation of a Continuous-Time Delta Sigma ADC. For this, we decided to use a Model-based design approach which it is adopted to address problems associated with designing complex control and signal processing systems such as the case of Continuous-Time Delta Sigma ADC. The goal of our study is the design of a 10 bit ENOB ADC for energy measurement systems used in particle identification through a new generation of detectors based on diamond. Results of the synthesis of a proposed fifth order Continuous-Time Delta Sigma ADC modulator for 10-bit ENOB ADC based on a Cascaded Resonators Feedforward architecture and simulations of the dispersion of its components (due to fabrication process) using the proposed tool are demonstrated and discussed.

   ↳ physics.ins-detnucl-ex0 citations
6. 06*

   Passive low-energy nuclear recoil detection with color centers

   Bernadette K. Cogswell🇺🇸 · Apurva Goel🇺🇸 · Patrick Huber🇺🇸

   Crystal damage events such as tracks and point defects have been used to record and detect radiation for a long time and recently they have been proposed as a means for dark matter detection. Color centers can be read out optically and we propose a scheme based on selective plane illumination microscopy for sub-micron imaging of large volumes corresponding to kilogram mass detectors. This class of detectors would be passive and would operate at room temperature. We apply these concepts to the detection of reactor neutrinos using coherent elastic neutrino nucleus scattering (CEvNS). Crystal damage formation energies are intrinsically on the order of 25eV, resulting in similarly low nuclear recoil thresholds. This would enable the first observation of reactor neutrino CEvNS with detectors as small as 10g. Additionally, a competitive search for spin-dependent dark matter scattering down to a dark matter mass of 0.3GeV could be possible. Passive crystal detectors might also be attractive for nuclear non-proliferation safeguards if used to monitor reactor power and to put limits on plutonium production. The passive nature and small footprint of the proposed detectors implies that these might fit well within accepted reactor safeguards operations.

   ↳ physics.ins-dethep-exhep-phnucl-exPhys.Rev.Applied(2021)·21 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.