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Clustering in $^{18}$O - absolute determination of branching ratios via high-resolution particle spectroscopy

by S. Pirrie, C. Wheldon, Tz. Kokalova, J. Bishop, R. Hertenberger, H.-F. Wirth, S.~Bailey, N. Curtis, D. Dell'Aquila, Th. Faestermann, D. Mengoni, R. Smith, D.Torresi, A. Turner

This Submission thread is now published as

Submission summary

Authors (as registered SciPost users): Stuart Pirrie · Robin Smith
Submission information
Preprint Link: scipost_201912_00001v1  (pdf)
Date accepted: 2020-01-08
Date submitted: 2019-12-01 01:00
Submitted by: Pirrie, Stuart
Submitted to: SciPost Physics Proceedings
Proceedings issue: 24th European Few Body Conference (EFB2019)
Ontological classification
Academic field: Physics
  • Nuclear Physics - Experiment
Approaches: Experimental, Computational


The determination of absolute branching ratios for high-energy states in light nuclei is an important and useful tool for probing the underlying nuclear structure of individual resonances: for example, in establishing the tendency of an excited state towards $\alpha$-cluster structure. Difficulty arises in measuring these branching ratios due to similarities in available decay channels, such as ($^{18}$O,$n$) and ($^{18}$O,$2n$), as well as differences in geometric efficiencies due to population of bound excited levels in daughter nuclei. Methods are presented using Monte Carlo techniques to overcome these issues.

Published as SciPost Phys. Proc. 3, 009 (2020)

Reports on this Submission

Anonymous Report 1 on 2019-12-23 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:scipost_201912_00001v1, delivered 2019-12-23, doi: 10.21468/SciPost.Report.1412


The paper is
- clear
- detailed
- well written.

It deserves publication in the proceedings book of 24th European Few-Body Conference.

However, some sentences should be spent in the final part about the foreseen results of this analysis and their implication on this interesting field.
Minor corrections suggested:

****In affiliations:
“3. … Fedorico”-> Federico

****In 1.Introduction
“The 18 O nucleus presents”-> presents itself
“indicates the potential of 12C” -> the potentiality
“Of proposed these rotational bands, two have proposed cluster …” -> Among the propounded rotational bands, two have been proposed as cluster structure
“a ratio of larger than”-> a ratio larger than

****In 2. Experimental method
“was incident on”-> was impinging on
“the correct reaction channel was observed”-> the correct reaction channel could be selected
“allowing for the detection of particles” -> allowing for particle detection
“Catania plot”-> Catania plot, later described in this paragraph

****In 3.1 Kinematic cones
“for more detail”-> for more details

****In 3.2.1 Determination…
“relies mostly…”-> relies mostly on
“to look as these states”-> to look at these states

****In Figure 3. Caption
Explain in the caption or somewhere in the text what is meant for pseudo-pixels

****In 3.2 2n-decay
“Nout – in the case…” -> Nout (in the case … 39%)

  • validity: -
  • significance: -
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

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