Precise Calibration of Laser Frequency for determination Sc Charge Radii
ORAL
Abstract
A kink structure is observed at the magic numbers in chains of charge radii but is missing at the neutron number $N \quad =$ 20 for $_{\mathrm{18}}$Ar, $_{\mathrm{19}}$K and $_{\mathrm{20}}$Ca. Determination of the charge radii of proton-rich $_{\mathrm{21}}$Sc isotopes across $N \quad =$ 20 are planned to address the disappearance of shell-closure signature. Collinear laser spectroscopy, which requires accurate and precise knowledge of laser frequency, will be used to deduce the charge radii. To calibrate the laser frequency, a Doppler-free spectroscopic measurement of molecular iodine is being implemented to measure precisely-known transitions in the visible to near-infrared wavelength region. The status of development and test results will be discussed.
*This work was supported in part by the National Science Foundation, Grant No. PHY-15-65546
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Authors
R. Powel
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
A. Klose
Dept. of Chemistry, Augustana Univ., Sioux Falls, SD 57197, USA
D. Garand
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
J. D. Lantis
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
A. J. Miller
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
K. Minamisono
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
W. Nazarewicz
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
S. Pineda
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
C. Sumithrarachchi
National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824
