Towards nuclear structure with radioactive muonic atoms: The nuclear charge radius of radioactive isotopes from measurements of muonic X-rays

A. Skawran, A. Adamczak, A. Antognini, N. Berger, T. E. Cocolios, R. Dressler, C. Düllmann, R. Eichler, P. Indelicato, K. Jungmann, K. Kirch, A. Knecht, J. J. Krauth, J. Nuber, A. Papa, R. Pohl, M. Pospelov, E. Rapisarda, D. Renisch, P. ReiterN. Ritjoho, S. Roccia, N. Severijns, S. Vogiatzi, F. Wauters, L. Willman

Research output: Contribution to journalArticlepeer-review

Abstract

The muX project at the Paul Scherrer Institut aims to perform highresolution muonic atom X-ray spectroscopy for the extraction of nuclear charge radii of radioactive isotopes that can be handled only in microgram quantities. Measurements of the absolute charge radii of high-Z radioactive elements are complementary to the measurements of relative differences in mean-square radii along the isotopic chain available from laser spectroscopy. One of the major limitations of atomic structure calculations is related with the uncertainty of the nuclear charge radius. This is the case for the extraction of the Weinberg angle from atomic parity violation in 226Ra. A new approach to solve previous limitations of muonic atom X-ray spectroscopy experiments is the application of multiple muon transfer reactions in a high-pressure hydrogen gas cell with a small admixture of deuterium. The validity of this method has been demonstrated with a measurement with only 5 μg of gold.

Original languageEnglish (US)
Article number42
JournalNuovo Cimento della Societa Italiana di Fisica C
Volume42
Issue number2-3
DOIs
StatePublished - Mar 2019
Externally publishedYes

Bibliographical note

Funding Information:
*** The authors acknowledge the IN2P3/STFC French/UK Ge Pool for providing several Ge detectors. Fruitful discussions with P. Kammel are gratefully acknowledged. The experiment was performed at the πE1 beam line of PSI. We would like to thank the accelerator and support groups for the excellent conditions. Technical support by F. Barchetti, F. Burri, M. Meier, L. Noorda and A. Stoykov from PSI and B. Zehr from the IPP workshop at ETHZ is gratefully acknowledged. We thank A.Weber from PSI for making the Au coating on the Cu foil. This work was supported by the Paul Scherrer Institut through the Career Return Programme, by the Swiss National Science Foundation through the Marie Heim-Vögtlin grant No. 164515 and the SNF project grant No. 200021 165569 and by a KU Leuven START grant.

Funding Information:
The authors acknowledge the IN2P3/STFC French/UK Ge Pool for providing several Ge detectors. Fruitful discussions with P. Kammel are gratefully acknowledged. The experiment was performed at the ?E1 beam line of PSI. We would like to thank the accelerator and support groups for the excellent conditions. Technical support by F. Barchetti, F. Burri, M. Meier, L. Noorda and A. Stoykov from PSI and B. Zehr from the IPP workshop at ETHZ is gratefully acknowledged. We thank A.Weber from PSI for making the Au coating on the Cu foil. This work was supported by the Paul Scherrer Institut through the Career Return Programme, by the Swiss National Science Foundation through the Marie Heim-V?gtlin grant No. 164515 and the SNF project grant No. 200021-165569 and by a KU Leuven START grant.

Publisher Copyright:
© 2019 Societa Italiana di Fisica. All rights reserved.

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