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Title: Proton superfluidity and charge radii in proton-rich calcium isotopes

Abstract

We report that one of the most important global properties of the atomic nucleus is its size. Experimentally determined nuclear charge radii carry unique information on the nuclear force and complex dynamics of protons and neutrons moving inside the nucleus. The intricate behaviour of charge radii along the chain of Ca isotopes, including the unexpectedly large charge radius of neutron-rich 52Ca, poses a daunting challenge for nuclear theory. Here we present the measurements of the charge radii of proton-rich isotopes 36,37,38Ca, whose properties are impacted by the interplay between nuclear superfluidity and weak binding. Calculations carried out within nuclear density functional theory show that the combination of a novel interaction and a state-of-the-art theoretical method can successfully explain the behaviour of charge radii from the lightest to the heaviest Ca isotopes. Lastly, through this model, we show how the new data on 36,37,38Ca elucidate the nature of nucleonic pairing in weakly bound proton-rich isotopes.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [2];  [1];  [2];  [1]; ORCiD logo [3];  [4];  [1];  [1]; ORCiD logo [4];  [2];  [5];  [4];  [4];  [1];  [6];  [1]
  1. Michigan State Univ., East Lansing, MI (United States)
  2. Augustana College, Sioux Falls, SD (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Technische Universität Darmstadt (Germany)
  5. Universität Erlangen (Germany)
  6. TRIUMF, Vancouver, BC (Canada)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1528704
Grant/Contract Number:  
AC05-00OR22725; NA0002924; SC0013365; SC0018083
Resource Type:
Accepted Manuscript
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 15; Journal Issue: 5; Journal ID: ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Miller, Andrew J., Minamisono, Kei, Klose, A., Garand, David, Kujawa, C., Lantis, J. D., Liu, Yuan, Maaß, B., Mantica, P. F., Nazarewicz, W., Nörtershäuser, W., Pineda, S. V., Reinhard, P. -G., Rossi, D. M., Sommer, F., Sumithrarachchi, C., Teigelhöfer, A., and Watkins, J. Proton superfluidity and charge radii in proton-rich calcium isotopes. United States: N. p., 2019. Web. doi:10.1038/s41567-019-0416-9.
Miller, Andrew J., Minamisono, Kei, Klose, A., Garand, David, Kujawa, C., Lantis, J. D., Liu, Yuan, Maaß, B., Mantica, P. F., Nazarewicz, W., Nörtershäuser, W., Pineda, S. V., Reinhard, P. -G., Rossi, D. M., Sommer, F., Sumithrarachchi, C., Teigelhöfer, A., & Watkins, J. Proton superfluidity and charge radii in proton-rich calcium isotopes. United States. doi:10.1038/s41567-019-0416-9.
Miller, Andrew J., Minamisono, Kei, Klose, A., Garand, David, Kujawa, C., Lantis, J. D., Liu, Yuan, Maaß, B., Mantica, P. F., Nazarewicz, W., Nörtershäuser, W., Pineda, S. V., Reinhard, P. -G., Rossi, D. M., Sommer, F., Sumithrarachchi, C., Teigelhöfer, A., and Watkins, J. Mon . "Proton superfluidity and charge radii in proton-rich calcium isotopes". United States. doi:10.1038/s41567-019-0416-9.
@article{osti_1528704,
title = {Proton superfluidity and charge radii in proton-rich calcium isotopes},
author = {Miller, Andrew J. and Minamisono, Kei and Klose, A. and Garand, David and Kujawa, C. and Lantis, J. D. and Liu, Yuan and Maaß, B. and Mantica, P. F. and Nazarewicz, W. and Nörtershäuser, W. and Pineda, S. V. and Reinhard, P. -G. and Rossi, D. M. and Sommer, F. and Sumithrarachchi, C. and Teigelhöfer, A. and Watkins, J.},
abstractNote = {We report that one of the most important global properties of the atomic nucleus is its size. Experimentally determined nuclear charge radii carry unique information on the nuclear force and complex dynamics of protons and neutrons moving inside the nucleus. The intricate behaviour of charge radii along the chain of Ca isotopes, including the unexpectedly large charge radius of neutron-rich 52Ca, poses a daunting challenge for nuclear theory. Here we present the measurements of the charge radii of proton-rich isotopes 36,37,38Ca, whose properties are impacted by the interplay between nuclear superfluidity and weak binding. Calculations carried out within nuclear density functional theory show that the combination of a novel interaction and a state-of-the-art theoretical method can successfully explain the behaviour of charge radii from the lightest to the heaviest Ca isotopes. Lastly, through this model, we show how the new data on 36,37,38Ca elucidate the nature of nucleonic pairing in weakly bound proton-rich isotopes.},
doi = {10.1038/s41567-019-0416-9},
journal = {Nature Physics},
number = 5,
volume = 15,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 11, 2020
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