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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.