Excitation of baryonic resonances in stable medium-mass nuclei of Sn

J L Rodriguez-Sanchez; J Benlliure; E Haettner; C Scheidenberger; J Vargas; Y Ayyad; H Alvarez-Pol; J Atkinson; T Aumann; S Beceiro-Novo; K Boretzky; M Caamaño; E Casarejos; D Cortina-Gil; P Diaz Fernandez; A Estrade; H Geissel; K Itahashi; A Kelic-Heil; H Lenske; Yu A Litvinov; C Paradela; D Perez-Loureiro; S Pietri; A Prochazka; T R Saito; M Takechi; Y K Tanaka; I Vidaña; H Weick; J S Winfield; the Super-FRS experiment collaboration

arXiv · 2006.04589

Excitation of baryonic resonances in stable medium-mass nuclei of Sn

View original source ↗Read source document ↗Export metadata ↓

Abstract

Isobaric charge-exchange reactions induced by beams of 112Sn have been investigated at the GSI facilities using the fragment separator FRS. The high-resolving power of this spectrometer makes it possible to obtain the isobaric charge-exchange cross sections with an accuracy of 3% and to separate quasi-elastic and inelastic contributions in the missing-energy spectra, in which the inelastic component is associated to the in-medium excitation of baryonic resonances such as the $\Delta$ resonance. We report on the results obtained for the (p,n) and (n,p) channels excited by using different targets that cover a large range in neutron excess.

Explore related subjects

nucl-ex

Keep this discovery

BibTeX RIS

J L Rodriguez-Sanchez, J Benlliure, E Haettner, C Scheidenberger, J Vargas, Y Ayyad, H Alvarez-Pol, J Atkinson, T Aumann, S Beceiro-Novo, K Boretzky, M Caamaño, E Casarejos, D Cortina-Gil, P Diaz Fernandez, A Estrade, H Geissel, K Itahashi, A Kelic-Heil, H Lenske, Yu A Litvinov, C Paradela, D Perez-Loureiro, S Pietri, A Prochazka, T R Saito, M Takechi, Y K Tanaka, I Vidaña, H Weick, J S Winfield, the Super-FRS experiment collaboration. 2020-06-04. Excitation of baryonic resonances in stable medium-mass nuclei of Sn. https://arxiv.org/abs/2006.04589

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Reinvestigation of the Yield of the Trinity Device

Previous published analyses of trinitite to determine the yield of the Trinity nuclear explosion used various estimates of the fraction of fission products that became incorporated in trinitite. Furthermore, these studies utilized nuclear data that has subsequently been revised. Utilizing a planar germanium detector, we observed gamma rays produced by the decays of both 137Cs and 239Pu from four samples of trinitite. From the observed 137Cs/239Pu ratios of and a simple analysis method based on current nuclear data and weapons debris studies, we find an average yield of 9.1+-4.5 kilotons from our four samples. While this result is substantially lower than the established total yield of 21 kilotons, it is in reasonable agreement that attributable to fissions in the 239Pu core alone.

nucl-ex↗

arXiv2026

Search for neutrinoless quadruple beta decay of $^{136}$Xe in PandaX-4T detector

The observation of neutrinoless quadruple beta decay (0$\nu$4$\beta$) in the absence of neutrinoless double beta decay (0$\nu$2$\beta$) has been argued to provide a strong indication that neutrinos are Dirac particles. We report a search for 0$\nu$4$\beta$ decay of $^{136}\text{Xe}$ using a total $^{136}\text{Xe}$ exposure of 148.4 kg$\cdot$yr, collected during the commissioning and the first science runs of the PandaX-4T experiment. No significant excess of events over the background is observed. A lower limit on the 0$\nu$4$\beta$ decay half-life of $^{136}\text{Xe}$ is set at 6.01 x $10^{24}$ yr at the 90% confidence level. This result establishes the most stringent constraint on this process in xenon, demonstrating the unique capability of the PandaX-4T detector in probing lepton number violation and shedding light on the fundamental nature of neutrinos.

nucl-ex↗

arXiv2026

Island of Inversion in neutron-rich cobalt isotopes revealed from mass measurements

Mass measurements of the ground and isomeric states of $^{68-70}$Co have been performed using the JYFLTRAP Penning-trap mass spectrometer at the IGISOL facility. The masses were measured, either for the first time for the isomeric states of $^{68}$Co and $^{70}$Co, or with greatly improved precision for the others, removing ambiguities in the mass surface beyond $N=40$. The ordering of the low and high-spin states in $^{68}$Co and $^{70}$Co has also been established. The results, supported by Large-Scale Shell Model and Discrete Non-Orthogonal Shell-Model calculations, show a gradual lowering of intruder states with increasing neutron number, eventually leading to an inversion in $^{70}$Co. These findings clarify previously proposed contradictory interpretations. Finally, we demonstrate the importance of including induced effective 3N forces for a consistent description of binding energies in the island of inversion near $N=40$.

nucl-ex↗