Tue·Jan 9, 2024Tuesday·January 9, 2024

1. 01*

   Search for a critical point of strongly-interacting matter in central ${}^{40}$Ar +${}^{45}$Sc collisions at 13$A$-75$A$ GeV/$c$ beam momentum

   The NA61/SHINE Collaboration: H. Adhikary · P. Adrich · K. K. Allison · N. Amin · E. V. Andronov · T. Antićić · I. -C. Arsene · M. Bajda · Y. Balkova · M. Baszczyk · D. Battaglia · A. Bazgir and 144 other authors

   The critical point of strongly interacting matter is searched for at the CERN SPS by the NA61/SHINE experiment in central ${}^{40}$Ar +${}^{45}$Sc collisions at 13$A$, 19$A$, 30$A$, 40$A$, and 75$A$ GeV/$c$. The dependence of the second-order scaled factorial moments of proton multiplicity distributions on the number of subdivisions in transverse momentum space is measured. The intermittency analysis uses statistically independent data sets for every subdivision in transverse and cumulative-transverse momentum variables. The results obtained do not indicate the searched intermittent pattern. An upper limit on the fraction of correlated protons and the intermittency index is obtained based on a comparison with the Power-law Model.

   nucl-exhep-exEPJC(2024)·22 citations
2. 02*

   Measurement of ${}^{144}$Sm(p,$\gamma$) cross-section at Gamow energies

   Tanmoy Bar · Dipali Basak🇮🇳 · Lalit Kumar Sahoo · Sukhendu Saha · Jagannath Datta · Sandipan Dasgupta🇮🇳 · Chinmay Basu

   The cross-section measurement of ${}^{144}$Sm(p, $\gamma$)${}^{145}$Eu (T${}_{1/2}=$5.93(4) days) reaction has been performed at proton energies around 2.6, 3.1, 3.7, 4.1, 4.2, 4.7, 5.1, 5.5, 5.9, 6.4, 6.8 MeV using the activation technique. These energies correspond to the Gamow window for 3, 4 GK and a partial portion for 2 GK. ${}^{144}$Sm has been chosen for the present study because of its significantly higher abundance compared to the other neighboring $p$-nuclides (Z $>$ 50). The astrophysical $S-$factor of this reaction has been measured for the first time at E${}_p^{cm}=$ 2.57$\pm$0.13 MeV, $S-$ factor$=$2.542$\pm$1.152($\times$10${}^{10}$) MeV-b. Cross-section data were compared with the previously measured experimental data from literature and the theoretical predictions obtained using Hauser-Feshbach statistical model codes TALYS 1.96 and NON-SMOKER. A satisfactory agreement between experimental data and theoretical results was observed. Molecular deposition technique was used to prepare the ${}^{144}$Sm targets having thickness between 100$-$350 $\mu$g/cm${}^2$ on Al backing. Obtained results were utilized to predict the reaction rates for ${}^{144}$Sm (p, $\gamma$) and ${}^{145}$Eu ($\gamma$, p) reactions using TALYS 1.96 and the reciprocity theorem.

   nucl-exastro-ph.SRJ.Phys.G(2024)·6 citations
3. 03*

   Systematic shell-model study of ${}^{99-129}$Cd isotopes and isomers in neutron-rich ${}^{127-131}$In isotopes

   Deepak Patel🇮🇳 · Praveen C. Srivastava🇮🇳 · Noritaka Shimizu🇯🇵 · Yutaka Utsuno🇯🇵

   Systematic shell-model calculations are presented for odd-mass Cd isotopes with $N=51-81$ utilizing a combination of a $G$-matrix interaction and a semiempirical one. The excited energy spectra and electromagnetic transition probabilities are compared with the recently available experimental data. We have found that the observed quadrupole moments in the $11/2_1^{-}$ states that linearly change with the neutron number are well accounted for by the dominance of prolate shapes throughout the Cd isotope chain. We have also described the properties of several isomeric states in neutron-rich ${}^{127-131}$In isotopes that were recently observed in Jyväskylä.

   ↳ nucl-thnucl-exPRC(2024)·5 citations
4. 04*

   Characterizing the initial and final state effects in isobaric collisions at energies available at the BNL Relativistic Heavy Ion Collider

   Niseem Magdy🇺🇸

   The Multi-Phase Transport model (AMPT) is employed to predict Symmetric Correlations (SC), Asymmetric Correlations (ASC), Normalized Symmetric Correlations (NSC), and Normalized Asymmetric Correlations (NASC) in ${}^{96}Ru{+}^{96}Ru$ and ${}^{96}Zr{+}^{96}Zr$ collisions at 200~GeV. Our study offers insights into the behavior of SC, ASC, NSC, and NASC, considering various nuclear structure scenarios to account for differences between the two isobars. Additionally, we emphasize the importance of detailed experimental measurements as they will serve as a critical constraint for refining the predictions of theoretical models.

   ↳ nucl-thnucl-exPRC(2024)·6 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.