Electric dipole polarizability of Ca 40

R. W. Fearick; P. Von Neumann-Cosel; S. Bacca; J. Birkhan; F. Bonaiti; I. Brandherm; G. Hagen; H. Matsubara; W. Nazarewicz; N. Pietralla; V. Yu Ponomarev; P. G. Reinhard; X. Roca-Maza; A. Richter; A. Schwenk; J. Simonis; A. Tamii

doi:10.1103/PhysRevResearch.5.L022044

Electric dipole polarizability of Ca 40

R. W. Fearick, P. Von Neumann-Cosel, S. Bacca, J. Birkhan, F. Bonaiti, I. Brandherm, G. Hagen, H. Matsubara, W. Nazarewicz, N. Pietralla, V. Yu Ponomarev, P. G. Reinhard, X. Roca-Maza, A. Richter, A. Schwenk, J. Simonis, A. Tamii

Theoretical and Computational Physics

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Abstract

The electric dipole strength distribution in Ca40 between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at very forward angles. Combined with total photoabsorption data at higher excitation energy, this enables an extraction of the electric dipole polarizability αD(40Ca)=1.92(17) fm3. Together with the measured αD in Ca48, it provides a stringent test of modern theoretical approaches, including coupled-cluster calculations with chiral effective field theory interactions and state-of-the art energy density functionals. The emerging picture is that for this medium-mass region dipole polarizabilities are well described theoretically, with important constraints for the neutron skin in Ca48 and related equation of state quantities.

Original language	English
Article number	L022044
Journal	Physical Review Research
Volume	5
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevResearch.5.L022044
State	Published - Apr 2023

Funding

Acknowledgments. This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Project-ID 279384907, SFB 1245, through the Cluster of Excellence “Precision Physics, Fundamental Interactions, and Structure of Matter” ( EXC 2118/1, Project ID 39083149); by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Awards No. DE-SC0013365 and No. DE-SC0023175 (NUCLEI SciDAC-5 collaboration); under the Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC (Oak Ridge National Laboratory); and by the University of Cape Town. Computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) programme. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.

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Fearick, R. W., Von Neumann-Cosel, P., Bacca, S., Birkhan, J., Bonaiti, F., Brandherm, I., Hagen, G., Matsubara, H., Nazarewicz, W., Pietralla, N., Ponomarev, V. Y., Reinhard, P. G., Roca-Maza, X., Richter, A., Schwenk, A., Simonis, J., & Tamii, A. (2023). Electric dipole polarizability of Ca 40. Physical Review Research, 5(2), Article L022044. https://doi.org/10.1103/PhysRevResearch.5.L022044

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title = "Electric dipole polarizability of Ca 40",

abstract = "The electric dipole strength distribution in Ca40 between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at very forward angles. Combined with total photoabsorption data at higher excitation energy, this enables an extraction of the electric dipole polarizability αD(40Ca)=1.92(17) fm3. Together with the measured αD in Ca48, it provides a stringent test of modern theoretical approaches, including coupled-cluster calculations with chiral effective field theory interactions and state-of-the art energy density functionals. The emerging picture is that for this medium-mass region dipole polarizabilities are well described theoretically, with important constraints for the neutron skin in Ca48 and related equation of state quantities.",

author = "Fearick, {R. W.} and {Von Neumann-Cosel}, P. and S. Bacca and J. Birkhan and F. Bonaiti and I. Brandherm and G. Hagen and H. Matsubara and W. Nazarewicz and N. Pietralla and Ponomarev, {V. Yu} and Reinhard, {P. G.} and X. Roca-Maza and A. Richter and A. Schwenk and J. Simonis and A. Tamii",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

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Fearick, RW, Von Neumann-Cosel, P, Bacca, S, Birkhan, J, Bonaiti, F, Brandherm, I, Hagen, G, Matsubara, H, Nazarewicz, W, Pietralla, N, Ponomarev, VY, Reinhard, PG, Roca-Maza, X, Richter, A, Schwenk, A, Simonis, J & Tamii, A 2023, 'Electric dipole polarizability of Ca 40', Physical Review Research, vol. 5, no. 2, L022044. https://doi.org/10.1103/PhysRevResearch.5.L022044

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AU - Fearick, R. W.

AU - Von Neumann-Cosel, P.

AU - Bacca, S.

AU - Birkhan, J.

AU - Bonaiti, F.

AU - Brandherm, I.

AU - Hagen, G.

AU - Matsubara, H.

AU - Nazarewicz, W.

AU - Pietralla, N.

AU - Ponomarev, V. Yu

AU - Reinhard, P. G.

AU - Roca-Maza, X.

AU - Richter, A.

AU - Schwenk, A.

AU - Simonis, J.

AU - Tamii, A.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2023/4

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N2 - The electric dipole strength distribution in Ca40 between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at very forward angles. Combined with total photoabsorption data at higher excitation energy, this enables an extraction of the electric dipole polarizability αD(40Ca)=1.92(17) fm3. Together with the measured αD in Ca48, it provides a stringent test of modern theoretical approaches, including coupled-cluster calculations with chiral effective field theory interactions and state-of-the art energy density functionals. The emerging picture is that for this medium-mass region dipole polarizabilities are well described theoretically, with important constraints for the neutron skin in Ca48 and related equation of state quantities.

AB - The electric dipole strength distribution in Ca40 between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at very forward angles. Combined with total photoabsorption data at higher excitation energy, this enables an extraction of the electric dipole polarizability αD(40Ca)=1.92(17) fm3. Together with the measured αD in Ca48, it provides a stringent test of modern theoretical approaches, including coupled-cluster calculations with chiral effective field theory interactions and state-of-the art energy density functionals. The emerging picture is that for this medium-mass region dipole polarizabilities are well described theoretically, with important constraints for the neutron skin in Ca48 and related equation of state quantities.

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Electric dipole polarizability of Ca 40

Abstract

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