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Determination of phase space region for cross-check validation of the neutron detection in the BINA experiments
by B. Włoch, K. Bodek, I. Ciepał, M. Eslami-Kalantari, J. Golak, N. Kalantar-Nayestanaki, G. Khatri, St. Kistryn, B. Kłos, A. Kozela, J. Kuboś, P. Kulessa, A. Łobejko, A. Magiera, H. Mardanpour, J. Messchendorp, I. Mazumdar, W. Parol, A. Ramazani-Moghaddam-Arani, D. Rozpędzik, R. Skibiński, I. Skwira-Chalot, E. Stephan, A. Wilczek, H. Witała, A Wrońska and J. Zejma
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Submission summary
| Authors (as registered SciPost users): | Bogusław Włoch |
| Submission information | |
|---|---|
| Preprint Link: | scipost_201911_00019v1 (pdf) |
| Date submitted: | 2019-11-07 01:00 |
| Submitted by: | Włoch, Bogusław |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 24th European Few Body Conference (EFB2019) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
Deuteron breakup reactions are basic laboratories for testing nuclear force models. Recent improvements in the data analysis allow for direct identification of neutrons in the BINA detection setup. This opens up the opportunity to study new aspects of few-nucleon system dynamics like charge dependence of nuclear force or Coulomb interaction. In this paper we determine regions along the kinematical curves where differential cross section of deuteron-proton breakup reactions can be measured by the proton-neutron and proton-proton coincidences simultaneously. This is particularly useful for validation of the neutron detection technique.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2019-11-24 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_201911_00019v1, delivered 2019-11-24, doi: 10.21468/SciPost.Report.1339
Strengths
1. This paper addresses experimental measurements of a fundamental few-body process
2. The technique that is described is to ensure an accurate calibration of an important piece of apparatus
3. The technique for calibration is novel and well described.
Weaknesses
1. The work is at a quite preliminary stage and follow-up work is required, but it is a worthwhile step in advancement to report at this stage.
Report
This is an experimental paper concerning the accurate calibration of apparatus for measuring the breakup of deuterons in d+p or d+d scattering at 160 MeV. The apparatus is installed at KVI Groningen. A forward wall of detectors can record both protons and neutrons and the more backward angles are also covered almost completely by a ball of detectors for protons. The paper concerns kinematic calculations to identify and quantify the cross section for those events in which all three particles from d+p going to p+p+n are recorded in the detector array. The kinematic completeness then means that for these events the neutron detection can be accurately calibrated from a comparison between the experimental measurements and the values calculated from the two accurate proton measurements.
Requested changes
There are a few typographical/grammatical changes that would improve the paper, but the readability is already excellent:
1. Last para of section 1: "A new generation of experiments..." and just before that, "like the coupled channel approach".
2. More than typographical but not critical: it would be good in the experimental setup to mention the thicknesses of the "thin" and "thick" scintillators.
3. Figure 1 caption, replace "adopted" by either "adapted" or "taken", whichever is accurate.
4. Section 3 first paragraph "...efficiency for neutron detection, estimated..."
5. After eq.1: "Examples of kinematics associated with different angular selections are..."
6. Following paragraph: "the following procedure has been developed"
7. Same paragraph: "and its energy exceeds..." and "Having these regions identified.."
8. It would be good to list the approximate thresholds for each type of particle.
9. Figure 3 caption: after "angles." add "(typical values for these angles are shown in fig. 4)" or similar.
10. In the conclusion: "possibility to extract the cross section", and "will be applied to the data", also "systematic uncertainties of the most important"
11. I suggest replacing "tools" after the above item 10 by either "variables" or "quantities".