Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin

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

doi:10.1103/PhysRevLett.118.252501

Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin

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

Research output: Contribution to journal › Article › peer-review

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Abstract

The electric dipole strength distribution in Ca48 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 first extraction of the electric dipole polarizability αD(Ca48)=2.07(22) fm3. Remarkably, the dipole response of Ca48 is found to be very similar to that of Ca40, consistent with a small neutron skin in Ca48. The experimental results are in good agreement with ab initio calculations based on chiral effective field theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in Ca48 of 0.14-0.20 fm.

Original language	English
Article number	252501
Journal	Physical Review Letters
Volume	118
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.118.252501
Publication status	Published - 23-06-2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.118.252501

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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. Y., Richter, A., Schwenk, A., & Tamii, A. (2017). Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin. Physical Review Letters, 118(25), Article 252501. https://doi.org/10.1103/PhysRevLett.118.252501

@article{00a11a8b774d4df5a646a270e925ed6e,

title = "Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin",

abstract = "The electric dipole strength distribution in Ca48 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 first extraction of the electric dipole polarizability αD(Ca48)=2.07(22) fm3. Remarkably, the dipole response of Ca48 is found to be very similar to that of Ca40, consistent with a small neutron skin in Ca48. The experimental results are in good agreement with ab initio calculations based on chiral effective field theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in Ca48 of 0.14-0.20 fm.",

author = "J. Birkhan and M. Miorelli and S. Bacca and S. Bassauer and Bertulani, {C. A.} and G. Hagen and H. Matsubara and {Von Neumann-Cosel}, P. and T. Papenbrock and N. Pietralla and Ponomarev, {V. Yu} and A. Richter and A. Schwenk and A. Tamii",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = jun,

day = "23",

doi = "10.1103/PhysRevLett.118.252501",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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}

Birkhan, J, Miorelli, M, Bacca, S, Bassauer, S, Bertulani, CA, Hagen, G, Matsubara, H, Von Neumann-Cosel, P, Papenbrock, T, Pietralla, N, Ponomarev, VY, Richter, A, Schwenk, A & Tamii, A 2017, 'Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin', Physical Review Letters, vol. 118, no. 25, 252501. https://doi.org/10.1103/PhysRevLett.118.252501

TY - JOUR

T1 - Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin

AU - Birkhan, J.

AU - Miorelli, M.

AU - Bacca, S.

AU - Bassauer, S.

AU - Bertulani, C. A.

AU - Hagen, G.

AU - Matsubara, H.

AU - Von Neumann-Cosel, P.

AU - Papenbrock, T.

AU - Pietralla, N.

AU - Ponomarev, V. Yu

AU - Richter, A.

AU - Schwenk, A.

AU - Tamii, A.

PY - 2017/6/23

Y1 - 2017/6/23

N2 - The electric dipole strength distribution in Ca48 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 first extraction of the electric dipole polarizability αD(Ca48)=2.07(22) fm3. Remarkably, the dipole response of Ca48 is found to be very similar to that of Ca40, consistent with a small neutron skin in Ca48. The experimental results are in good agreement with ab initio calculations based on chiral effective field theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in Ca48 of 0.14-0.20 fm.

AB - The electric dipole strength distribution in Ca48 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 first extraction of the electric dipole polarizability αD(Ca48)=2.07(22) fm3. Remarkably, the dipole response of Ca48 is found to be very similar to that of Ca40, consistent with a small neutron skin in Ca48. The experimental results are in good agreement with ab initio calculations based on chiral effective field theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in Ca48 of 0.14-0.20 fm.

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DO - 10.1103/PhysRevLett.118.252501

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VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

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Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin

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