PaperPanorama

Nuclear Experiment·nucl-ex

Wed·Oct 7, 2026

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 01

    Evolution of high-spin states in neutron-rich Au isotopes approaching the shell closure

    Y. Cho · Y. H. Kim · A. Navin · M. Rejmund · A. Lemasson · D. Ramos · E. Clement · C. Yuan · M. Liu · P. van Isacker · A. N. Andreyev · J. Dudouet and 39 other authors

    \textbf{Background: } The nuclear structure in the region southwest of the doubly magic Pb is important to benchmark theoretical models relevant for neutron-rich heavy element formation and for the origin of the peak in the mass abundance distribution. Although neutron-rich Pb, Tl, and Hg () isotopes are relatively well studied, experimental data for neutron-rich Au isotopes () remain largely limited due to experimental challenges. \textbf{Purpose: } The purpose of this work is to investigate the evolution of the high-spin structure in neutron-rich Au isotopes near the shell closure and to characterize the underlying shell-model configurations, with a particular focus on the roles of the high- unique-parity and orbitals. \textbf{Methods: } Neutron-rich Au isotopes were produced using multi-nucleon transfer reactions of Pt(Xe, I)Au at a beam energy of 7 MeV/u. %between a 7 MeV/u Xe beam and a Pt target at GANIL. Prompt and delayed -ray spectroscopy of isotopically identified reaction products was performed with a unique experimental setup combining the VAMOS++ large acceptance magnetic spectrometer, the AGATA HPGe -ray tracking array, and the CATLIFE detection system.

    nucl-exPhys. Rev. C 114, 034313 (2026)
  2. 02

    First Measurement of Compton Scattering on at HIS

    J. Zhou · E. Mancil · M.W. Ahmed · B. Crowe · G. Feldman · F.Q.L. Friesen · H. Gao · D. Godagama · H.W. Grießhammer · D. Hornidge · C.R. Howell · S. Jia and 18 other authors

    The world's first Compton scattering measurements on a He target were performed to probe neutron electromagnetic polarizabilities. Differential cross sections were measured at laboratory angles of , , , , , using circularly polarized, quasi-monoenergetic photon beams at weighted mean energy values of 61.5 and 97.1 MeV from the High Intensity -ray Source at the Triangle Universities Nuclear Laboratory. Comparisons with chiral effective field theory show good agreement at 97.1 MeV but over-prediction at 61.5 MeV, motivating further theoretical development.

    nucl-ex
  3. 03

    Charge exchange reactions with central and tensor interactions and nuclear matrix elements associated with double-beta-decay neutrinos and astro neutrinos

    Hiroyasu Ejiri · Yoritaka Iwata

    Nuclear matrix elements (NMEs) for neutrinoless beta-beta decays (DBD) and inverse-beta decays (IBD) are crucial for studying neutrino properties beyond and within the standard model by using DBDs and IBDs. The charge exchange nuclear reaction (CER) is a realistic probe for studying experimentally these NMEs. The present work shows for the first time an experimental way to extract the Gamow-Teller (GT) and tensor (T) NMEs associated with DBDs and IBDs from the q (momentum transfer) dependence of the CER cross-section by taking into accounts explicitly both the central and tensor interactions. The present method was applied for CERs on 71Ga used for the solar-neutrino and the Ga anomaly and on 100Mo and 128Te used for DBD and IBD. Impacts of the CER with the tensor interaction on the DBD and IBD NME studies are discussed.

    nucl-ex
  4. 04

    A rotation-based Hall-probe magnetic compass

    B. Wojtsekhowski🇺🇸 · C. Cuevas🇺🇸 · R. Dawson · W. Henry🇺🇸 · N. Liyanage🇺🇸 · G. Ron🇮🇱 · J. Wilson🇺🇸

    In many physics and space experiments the direction of a magnetic field must be known to one milliradian or better. We have developed a new type of magnetic compass, based on rotation, in which a spinning Hall probe (HP) produces an alternating signal proportional to the component of the magnetic field transverse to the axis of rotation. Aligning the rotation axis so that this signal vanishes gives the direction of the field. The device requires no calibration and is insensitive to electronics drift. A spinning-HP compass was built and used in a recent experiment at Jefferson Lab, where it determined the direction of the 25~G holding field of a polarized He target to about 1~mrad; the direction of the rotation axis was transferred to the laboratory frame with a laser and a flat mirror attached to the rotor. A second implementation of the rotation approach, a spinning field concentrator (SFC) with a stationary Hall probe, was also built. With 10 seconds of averaging the SFC compass resolves a transverse field of 18~G, corresponding to a directional resolution of 70~rad in a field of 0.25 G, close to the Earth's field.

    ↳ physics.ins-dethep-exnucl-ex0 citations
  5. 05

    Neutral Pseudoscalar Mesons, Hadron Light-by-Light Scattering, and the Muon Anomalous Magnetic Moment

    Cong-Cong Ye · Yu-Chen Hu · Minghui Ding · Craig D. Roberts

    Continuum Schwinger function methods\linebreak (CSM) are used to provide estimates of pseudoscalar meson pole contributions - , , , , - to the muon anomalous magnetic moment. The analysis framework is benchmarked via successful applications to an array of other meson and nucleon properties. It uses the leading order CSM truncation, augmented by a parametrisation of non-Abelian anomaly effects, to deliver an internally consistent treatment of all the pseudoscalar--two-photon transition form factors required to complete such a calculation. Employing those form factor predictions, the following results are obtained (units ): - a value lower than some other contemporary estimates; ; and a value of that is negligible. The total contribution is . Our analysis suggests that this pole contribution to is still not known with precision better than 5\%.

    ↳ hep-phhep-exhep-latnucl-ex+1