Registration of a Quadrupole Transition in High-Energy ⁸⁸Sr⁺ Ions Obtained by Laser Ablation Method

Round 1

Reviewer 1 Report

Evgeniy Telnov at all shows in his paper the registration of a quadrupole transition in high-energy Sr+ ions. The ions are produced by laser ablation and loaded into a quadrupole Paul trap. The Sr+ ion is cooled down in this trap using laser cooling (422nm). The paper is well written, but I have some comments to make before I accept the paper for publication.

I want the authors to show how they load the trap. On one side they claim to have a vacuum better 10(-9) mbar. On the other side they do laser ablation to get their Sr+ ions in the trap. Maybe they can show a picture of how they do it.

Figure 2 is so not clear to me. The flashes should clearly indicate the transitions.

Figure 9 The authors claim that the centerline corresponds to 𝑣=444778.988(8)(90)𝐺𝐻𝑧. On the right side of the spectra, I see a couple of 260 Mhz and a second line at about 520 Mhz. Where do these lines come from? (They have about the same line with ?)

I like to ask the authors to show error bars  in Figure 8 and Figure 9

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments for author File: Comments.pdf

It is necessary to check the language and the usage of the symbols, like some unit, such as MHz, GHz, etc.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Excellent presentation. I have no recommendations.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The authors answered all the questions and revised the manuscript. It can be accepted now.

No.