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Preparation of facilities for fundamental research with ultracold neutrons at PNPI

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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A. P. Serebrov, V. A. Mityuklyaev, A. A. Zakharov, A. N. Erykalov, M. S. Onegin, A. K. Fomin, V. A. Ilatovskiy, S. P. Orlov
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K. A. Konoplev, A. G. Krivshitch, V. M. Samsonov, V. F. Ezhov, V. V. Fedorov, K. O. Keshyshev, S. T. Boldarev, V. I. Marchenko

Nuclear Experiment · Submitted 28 Aug 2008

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim The WWR-M reactor of PNPI offers a unique opportunity to prepare a source for ultracold neutrons (UCN) in an environment of high neutron flux (about 3*10^12 n/cm^2/s) at still acceptable radiation heat release (about 4*10^-3 W/g).

how it is stated · asserted 0.84 read the record →

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arXiv ID0808.3978 (version 3)
Pith ID2B3XV5RI, Pith's permanent record of this paper and its review
CitationA. A. Zakharov, A. G. Krivshitch, A. K. Fomin, A. N. Erykalov, A. P. Serebrov, K. A. Konoplev, K. O. Keshyshev, M. S. Onegin, S. P. Orlov, S. T. Boldarev, V. A. Ilatovskiy, V. A. Mityuklyaev, V. F. Ezhov, V. I. Marchenko, V. M. Samsonov, V. V. Fedorov. "Preparation of facilities for fundamental research with ultracold neutrons at PNPI." arXiv:0808.3978 (2008). https://pith.science/paper/2B3XV5RI
Claim paper

The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,443 input tokens, $0.0003 reported.

What the abstract itself states, as probabilities: claims first 0.06 · states limitation 0.63 · human participants 0.02 · controlled comparison 0.27 · randomized assignment 0.01 · states quantitative result 0.96 · compares with prior results 0.88 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v3. Results and the main claim are underlined; .

The WWR-M reactor of PNPI offers a unique opportunity to prepare a source for ultracold neutrons (UCN) in an environment of high neutron flux (about 3*10^12 n/cm^2/s) at still acceptable radiation heat release (about 4*10^-3 W/g). It can be realized within the reactor thermal column situated close to the reactor core. With its large diameter of 1 m, this channel allows to install a 15 cm thick bismuth shielding, a graphite premoderator (300 dm^3 at 20 K), and a superfluid helium converter (35 dm^3). At a temperature of 1.2 K it is possible to remove the heat release power of about 20 W. Using the 4pi flux of cold neutrons within the reactor column can bring more than a factor 100 of cold neutron flux incident on the superfluid helium with respect to the present cold neutron beam conditions at the ILL reactor. The storage lifetime for UCN in superfluid He at 1.2 K is about 30 s, which is sufficient when feeding experiments requiring a similar filling time. The calculated density of UCN with energy between 50 neV and 250 neV in an experimental volume of 40 liters is about 10^4 n/cm^3. Technical solutions for realization of the project are discussed.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 The WWR-M reactor of PNPI offers a unique opportunity to prepare a source for ultracold neutrons (UCN) in an environment of high neutron flux (about 3*10^12 n/cm^2/s) at still acceptable radiation heat release (about 4*10^-3 W/g). background 0.71 0.24 0.19 asserted 0.84
s1 It can be realized within the reactor thermal column situated close to the reactor core. method 0.81 0.23 0.04 hedged possibility 0.57
s2 With its large diameter of 1 m, this channel allows to install a 15 cm thick bismuth shielding, a graphite premoderator (300 dm^3 at 20 K), and a superfluid helium converter (35 dm^3). method 0.95 0.26 0.06 asserted 0.75
s3 At a temperature of 1.2 K it is possible to remove the heat release power of about 20 W. result 0.66 0.46 0.06 hedged possibility 0.85
s4 Using the 4pi flux of cold neutrons within the reactor column can bring more than a factor 100 of cold neutron flux incident on the superfluid helium with respect to the present cold neutron beam conditions at the ILL reactor. result 0.83 0.48 0.21 hedged possibility 0.88
s5 The storage lifetime for UCN in superfluid He at 1.2 K is about 30 s, which is sufficient when feeding experiments requiring a similar filling time. result 0.57 0.49 0.14 asserted 0.96
s6 The calculated density of UCN with energy between 50 neV and 250 neV in an experimental volume of 40 liters is about 10^4 n/cm^3. result 1.00 0.79 0.20 asserted 0.97
s7 Technical solutions for realization of the project are discussed. contribution 0.51 0.45 0.04 asserted 0.63

What kind of paper the classifier reports this is: method or tool 0.71 · evidence from simulation or computation 0.56.

What was examined, and what was not

sources read
  • arXiv listing abstract v3
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

The WWR-M reactor of PNPI offers a unique opportunity to prepare a source for ultracold neutrons (UCN) in an environment of high neutron flux (about 3*10^12 n/cm^2/s) at still acceptable radiation heat release (about 4*10^-3 W/g). It can be realized within the reactor thermal column situated close to the reactor core. With its large diameter of 1 m, this channel allows to install a 15 cm thick bismuth shielding, a graphite premoderator (300 dm^3 at 20 K), and a superfluid helium converter (35 dm^3). At a temperature of 1.2 K it is possible to remove the heat release power of about 20 W. Using the 4pi flux of cold neutrons within the reactor column can bring more than a factor 100 of cold neutron flux incident on the superfluid helium with respect to the present cold neutron beam conditions at the ILL reactor. The storage lifetime for UCN in superfluid He at 1.2 K is about 30 s, which is sufficient when feeding experiments requiring a similar filling time. The calculated density of UCN with energy between 50 neV and 250 neV in an experimental volume of 40 liters is about 10^4 n/cm^3. Technical solutions for realization of the project are discussed.

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