Electric Dipole Polarizability of Ca48 and Implications for the Neutron Skin

Birkhan, J.; Miorelli, M.; Bacca, S.; Bassauer, S.; Bertulani, C. A.; Hagen, G.; Matsubara, H.; von Neumann-Cosel, P.; Papenbrock, T.; Pietralla, N.; Ponomarev, V. Yu.; Richter, A.; Schwenk, A.; Tamii, A.

doi:10.1103/PhysRevLett.118.252501

Title: Electric Dipole Polarizability of ${}^{48}{Ca}$ and Implications for the Neutron Skin

Journal Article · 22 June 2017 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.118.252501 · OSTI ID:1394473

Birkhan, J. ^[1]; Miorelli, M. ^[2]; Bacca, S. ^[3]; Bassauer, S. ^[1]; Bertulani, C. A. ^[4]; Hagen, G. ^[5]; Matsubara, H. ^[6]; von Neumann-Cosel, P. ^[1]; Papenbrock, T. ^[5]; Pietralla, N. ^[1]; Ponomarev, V. Yu. ^[1]; Richter, A. ^[1]; Schwenk, A. ^[7]; Tamii, A. ^[8]

Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
TRIUMF, Vancouver, BC (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
Texas A & M Univ., Commerce, TX (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Osaka Univ. (Japan); Tokyo Women's Medical Univ. (Japan)
Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik; Max Planck Inst. fur Kernphysik, Heidelberg (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Osaka Univ. (Japan)

The electric dipole strength distribution in ⁴⁸Ca between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at forward angles. Combined with photoabsorption data at higher excitation energy, this enables the rst extraction of the electric dipole polarizability D(⁴⁸Ca) = 2:07(22) fm³. Remarkably, the dipole response of ⁴⁸Ca is found to be very similar to that of ⁴⁰Ca, consistent with a small neutron skin in ⁴⁸Ca. The experimental results are in good agreement with ab initio calculations based on chiral e ective eld theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in ⁴⁸Ca of 0:14 - 0:20 fm.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC05-00OR22725; FG02-08ER41533; FG02-96ER40963; SC0008499

OSTI ID:: 1394473

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 118; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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The nucleon effective mass and its isovector splitting Malik, Tuhin; Mondal, C.; Agrawal, B. K. arXiv https://doi.org/10.48550/arxiv.1811.09077	text	January 2018
Neutron skins of atomic nuclei: per aspera ad astra Thiel, M.; Sfienti, C.; Piekarewicz, J. arXiv https://doi.org/10.48550/arxiv.1904.12269	text	January 2019
Effects of nuclear symmetry energy and equation of state on neutron star properties Ji, Fan; Hu, Jinniu; Bao, Shishao arXiv https://doi.org/10.48550/arxiv.1910.02266	text	January 2019
$g$-matrix folding-model approach to reaction cross sections for scattering of Ca isotopes on a C target Tagami, Shingo; Tanaka, Masaomi; Takechi, Maya arXiv https://doi.org/10.48550/arxiv.1911.05417	text	January 2019