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Production of hypernuclei from antiproton capture within a relativistic transport model.
Eur Phys J A Hadron Nucl
March 2024
CITENI, Campus Industrial de Ferrol, Universidade da Coruña, Ferrol, 15403 Spain.
Production yields of single- hypernuclei from simulated peripheral annihilations of antiprotons after capture on various target nuclei are reported. The initial annihilation process and the production of excited hypernuclei are estimated within the GiBUU transport framework, while their deexcitation process is treated with the ABLA++ code. The yield of excited hypernuclei range from 0.
View Article and Find Full Text PDFHigh-Precision Spectroscopy of ^{20}O Benchmarking Ab Initio Calculations in Light Nuclei.
Phys Rev Lett
December 2023
Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
The excited states of unstable ^{20}O were investigated via γ-ray spectroscopy following the ^{19}O(d,p)^{20}O reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2_{2}^{+} and 3_{1}^{+} states were firmly established. From the γ-ray branching and E2/M1 mixing ratios for transitions deexciting the 2_{2}^{+} and 3_{1}^{+} states, the B(E2) and B(M1) were determined.
View Article and Find Full Text PDFObservation of a Nuclear Recoil Peak at the 100 eV Scale Induced by Neutron Capture.
Phys Rev Lett
May 2023
Physik-Department, Technische Universität München, D-85748 Garching, Germany.
Coherent elastic neutrino-nucleus scattering and low-mass dark matter detectors rely crucially on the understanding of their response to nuclear recoils. We report the first observation of a nuclear recoil peak at around 112 eV induced by neutron capture. The measurement was performed with a CaWO_{4} cryogenic detector from the NUCLEUS experiment exposed to a ^{252}Cf source placed in a compact moderator.
View Article and Find Full Text PDFElectronic structure calculations and quantum dynamics of rotational deexcitation of CNNC by He.
Phys Chem Chem Phys
February 2022
Quantum Dynamics Lab, Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar 140001, India.
The quantum dynamics of rotational transitions of the diisocyanogen (CNNC) molecule undergoing collision with the helium (He) atom occurring in the interstellar medium (ISM) has been studied. The rotational deexcitation cross sections are extracted by first computing an potential energy surface of CNNC-He using the coupled-cluster with single and double and perturbative triple excitations with the F12a method (CCSD(T)-F12a) employing the aug-cc-pVTZ basis set. Utilizing the multipole expansions, collisional cross sections are determined for total energies of up to 1000 cm by the close coupling equations.
View Article and Find Full Text PDFSearch for Dark Matter Induced Deexcitation of ^{180}Ta^{m}.
Phys Rev Lett
May 2020
Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden Germany.
Weak-scale dark matter particles, in collisions with nuclei, can mediate transitions between different nuclear energy levels. In particular, owing to sizeable momentum exchange, dark matter particles can enable de-excitation of nuclear isomers that are extremely long lived with respect to regular radioactive decays. In this Letter, we utilize data from a past experiment with ^{180}Ta^{m} to search for γ lines that would accompany dark matter induced de-excitation of this isomer.
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