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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei IV
HK 18.4: Vortrag
Dienstag, 31. März 2020, 18:00–18:15, J-HS H
Laser Spectroscopy of Nickel 56 and a new Charge Exchange Cell — •Felix Sommer1, Nathan Everett2, David Garand2, Ruben De Groote3, Phillip Imgram1, Colton Kalman2, Jeremy Lantis2, Yuan Liu4, Andrew Klose5, Paul Mantica2, Andrew Miller2, Kei Minamisono2, Witold Nazarewicz2, Wilfried Nörtershäuser1, Robert Powel2, Paul-Gerhard Reinhard6, Elisa Romero-Romero7, Dominic Rossi1, Achim Schwenk1, Chandana Sumithrarachchi2, and Andrea Teigelhöfer8 — 1TU Darmstadt, DE — 2NSCL, US — 3Oak Ridge Laboratory, US — 4University of Jyväskylä, FI — 5Augustana University, US — 6Universität Erlangen-Nürnberg, DE — 7University of Tennessee, US — 8TRIUMF, CA
We present laser spectroscopic measurements of Nickel charge radii at and across the n=28 shell closure. Using the BECOLA experiment at NSCL, we achieved the first laser spectroscopic measurements of Nickel 55 and 56. Values for the difference in rms charge radii have been extracted for these isotopes and showcase the evolution across the shell closure. The results allow a comparison of ab initio calculations for Nickel 56 with those of Nickel 68 at the sub shell closure n=40. The measurements were done on the atomic system using a charge exchange cell, since no suitable transition is available in the ion. To extend future capabilities, we developed a new design that will allow the use of Magnesium vapor instead of the typically used alkalis.
This work was supported in part by NSF grant PHY-15-65546, U.S. DOE grant DE-NA0002924 and DFG grant SFB1245.