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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

Submission summary

As Contributors: Stuart Pirrie · Robin Smith
Preprint link: scipost_201912_00001v1
Date accepted: 2020-01-08
Date submitted: 2019-12-01
Submitted by: Pirrie, Stuart
Submitted to: SciPost Physics Proceedings
Proceedings issue: 24th European Few Body Conference (University of Surrey, U.K.)
Discipline: Physics
Subject area: 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.

Current status:
Publication decision taken: accept

Editorial decision: For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)

Submission & Refereeing History

Submission scipost_201912_00001v1 on 1 December 2019

Reports on this Submission

Anonymous Report 1 on 2019-12-23 Invited Report


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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