Mon·Jul 10, 2023Monday·July 10, 2023

1. 01*

   Measurement of the low-energy antitriton inelastic cross section

   ALICE Collaboration

   In this Letter, the first measurement of the inelastic cross section for antitriton$-$nucleus interactions is reported, covering the momentum range of $0.8\le p<2.4$ GeV/$c$. The measurement is carried out using data recorded with the ALICE detector in pp and Pb$-$Pb collisions at a centre-of-mass energy per nucleon of 13 TeV and 5.02 TeV, respectively. The detector material serves as an absorber for antitriton nuclei. The raw yield of (anti)triton nuclei measured with the ALICE apparatus is compared to the results from detailed ALICE simulations based on the GEANT4 toolkit for the propagation of (anti)particles through matter, allowing one to quantify the inelastic interaction probability in the detector material. This analysis complements the measurement of the inelastic cross section of antinuclei up to $A=3$ carried out by the ALICE Collaboration, and demonstrates the feasibility of the study of the isospin dependence of inelastic interaction cross section with the analysis techniques presented in this Letter.

   nucl-exhep-exPLB(2024)·8 citations
2. 02*

   Estimates of absolute branching fractions for the $f_0(1710)$ decays and radiative transitions $\psi (2S)\to \gamma f_0(1710)$ and ${\rm Y}(1S)\to \gamma f_0(1710)$

   N.N. Achasov🇷🇺 · G.N. Shestakov🇷🇺

   Using the result of the VES Collaboration for $Br(J/\psi \to \gamma f_0(1710))$, we estimate the absolute branching fractions for the $f_0(1710)$ decays into $\pi \pi$, $K\bar{K}$, $\eta \eta$, $\omega \omega$, and $\omega \varphi$. In addition, we estimate $Br(\psi (2S)\to \gamma f_0(1710))\approx 3.5\times 10^{-5}$ and $Br({\rm Y}(1S)\to \gamma f_0(1710))\approx 1\times 10^{-5}$.

   ↳ hep-phhep-exnucl-exnucl-thJETP Lett.(2023)·1 citation
3. 03*

   First bromine doped cryogenic implosion at the National Ignition Facility

   A. C. Hayes🇺🇸 · G. Kyrala · M. Gooden · J.B. Wilhelmy · L. Kot · P. Volegov · C. Wilde · B. Haines · Gerard Jungman · R.S. Rundberg · D.C. Wilson · C. Velsko and 20 other authors

   We report on the first experiment dedicated to the study of nuclear reactions on dopants in a cryogenic capsule at the National Ignition Facility (NIF). This was accomplished using bromine doping in the inner layers of the CH ablator of a capsule identical to that used in the NIF shot N140520. The capsule was doped with 3$\times$10${}^{16}$ bromine atoms. The doped capsule shot, N170730, resulted in a DT yield that was 2.6 times lower than the undoped equivalent. The Radiochemical Analysis of Gaseous Samples (RAGS) system was used to collect and detect ${}^{79}$Kr atoms resulting from energetic deuteron and proton ion reactions on ${}^{79}$Br. RAGS was also used to detect ${}^{13}$N produced dominantly by knock-on deuteron reactions on the ${}^{12}$C in the ablator. High-energy reaction-in-flight neutrons were detected via the ${}^{209}$Bi(n,4n)${}^{206}$Bi reaction, using bismuth activation foils located 50 cm outside of the target capsule. The robustness of the RAGS signals suggest that the use of nuclear reactions on dopants as diagnostics is quite feasible.

   ↳ physics.plasm-phnucl-exPhys.Plasmas(2023)·0 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.