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.
N1 - Publisher Copyright:
© 2017 American Physical Society.
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.
UR - http://www.scopus.com/inward/record.url?scp=85021327591&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021327591&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.118.252501
DO - 10.1103/PhysRevLett.118.252501
M3 - Article
C2 - 28696765
AN - SCOPUS:85021327591
SN - 0031-9007
VL - 118
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
M1 - 252501
ER -