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.
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. (2017). Electric Dipole Polarizability of <math display='inline'><mrow><mmultiscripts><mrow><mi>Ca</mi></mrow><mprescripts/><none/><mrow><mn>48</mn></mrow></mmultiscripts></mrow></math> and Implications for the Neutron Skin. Physical Review Letters, 118(25). https://doi.org/10.1103/PhysRevLett.118.252501
Birkhan, J., Miorelli, M., Bacca, S., et al., "Electric Dipole Polarizability of <math display='inline'><mrow><mmultiscripts><mrow><mi>Ca</mi></mrow><mprescripts/><none/><mrow><mn>48</mn></mrow></mmultiscripts></mrow></math> and Implications for the Neutron Skin," Physical Review Letters 118, no. 25 (2017), https://doi.org/10.1103/PhysRevLett.118.252501
@article{osti_1394473,
author = {Birkhan, J. and Miorelli, M. and Bacca, S. and Bassauer, S. and Bertulani, C. A. and Hagen, G. and Matsubara, H. and von Neumann-Cosel, P. and Papenbrock, T. and Pietralla, N. and others},
title = {Electric Dipole Polarizability of <math display='inline'><mrow><mmultiscripts><mrow><mi>Ca</mi></mrow><mprescripts/><none/><mrow><mn>48</mn></mrow></mmultiscripts></mrow></math> and Implications for the Neutron Skin},
annote = {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.},
doi = {10.1103/PhysRevLett.118.252501},
url = {https://www.osti.gov/biblio/1394473},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {25},
volume = {118},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2017},
month = {06}}
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
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