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The muX project
by F. Wauters and A. Knecht on behalf of the muX collaboration
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Submission summary
| Authors (as registered SciPost users): | Andreas Knecht · Frederik Wauters |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202101_00014v1 (pdf) |
| Date submitted: | 2021-01-29 14:27 |
| Submitted by: | Wauters, Frederik |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | Review of Particle Physics at PSI (PSI2020) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
The muX project is conducting a series of muonic X-ray measurements in medium- and high-Z nuclei at PSI, utilizing a high-purity germanium detector array, in-beam muon de- tectors, and a modern digital data-acquisition system. A novel hydrogen transfer target was developed, enabling measurements with as little as a few micrograms of target ma- terial. First measurements with radioactive Cm and Ra targets were conducted, aimed at determining their nuclear charge radii. These serve as important input for upcoming atomic parity violation experiments. The apparatus is also used to perform a feasibility study of an atomic parity violation experiment with the 2s − 1s muonic X-ray transition. In addition, the setup has been made available for a wider range of nuclear, particle, and solid-state physics measurements.
Current status:
Reports on this Submission
Anonymous Report 2 on 2021-2-16 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202101_00014v1, delivered 2021-02-16, doi: 10.21468/SciPost.Report.2574
Report
The journal's criteria are well met with this article.
The manuscript describes a new series of experiments exploiting the perfect infrastructure and beam quality provided by the PSI beam lines.
I recommend for publication with minor changes.
Requested changes
1) Abstract
line 12/13
… A novel hydrogen transfer target was developed, ….
-> … A novel hydrogen target for muon transfer was developed, …
2) Introduction
line 22/23
… typically around n=14.
comment: n=14 holds only for the lightest elements. The start of the quantum cascade,
if electrons are still present, starts typically around n=14 x ne, where ne is the principle quantum
number of the outmost approximately complete electron shell. See e.g.
• X-ray transitions from antiprotonic noble gases
Eur. Phys. J. D 47, 11–26 (2008), DOI: 10.1140/epjd/e2008-00025-3
• Relevance of ionization and electron refilling to the observation of the M1 transition
(M1:2s-1s) in light muonic atoms
Phys. Rev. A 39 (1989) 161, doi: 10.1103/PhysRevA.39.1610
3) Experimental setup
lines 73/74: … a lead target mounted 74 away from the beam axis …
Comment: Is it possible to indicate the position of lead target in figure setup?
4) Experimental setup
Fig. 22.1 and 22.2 captions: muX elsewhere is always set in italic. For consistency -> muX?
5) Other measurements
Fig. 22.6 caption. Mention that the displayed spectrum is muKr explicitly in the caption or as insert in the plot.
6) Other measurements
line 159
comment: reference to Fig 22.7 in the text, e.g.
… of isotopes such as 130Te [30,31] and 82Se [32] (Fig. 22.7).
7) Conclusions and outlook
comment: The autors may consider to include a sentence that such measurements are
complementary to the structure studies with radioactive and antiprotons as planned
for the forthcoming FLAIR facility at GSI.
8) References
ref. [10] line 218
ra+ -> Ra+
Report 1 by Adrian Signer on 2021-2-9 (Invited Report)
- Cite as: Adrian Signer, Report on arXiv:scipost_202101_00014v1, delivered 2021-02-09, doi: 10.21468/SciPost.Report.2526
Report
We (the editors Cy Hoffman, Klaus Kirch, Adrian Signer) had the
opportunity to review an earlier draft of the article and were in
communication with the authors before the submission. All our comments
and suggestions have been taken into account. Hence, we think the
paper can now be published in the current form.
Frederik Wauters on 2021-02-17 [id 1249]
We thank the referee for the comments , corrections, and suggestions. The manuscript is adapted accordingly. If the 'Editorial Recommendation' allows it, we would like to resubmit.