Nuclear emulsion with molybdenum filling for observation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0005.gif" overflow="scroll"><mml:mi mathvariant="normal">β</mml:mi><mml:mi mathvariant="normal">β</mml:mi></mml:math> decay

Ashitkov, V. D.; Bagulya, A.; Barabash, A. S.; Bradnová, V.; Chernyavsky, M. M.; Коновалов, С. И.; Okateva, N.; Orlova, G. I.; Polukhina, N.; Pozharova, E. A.; Smirnitsky, V. A.; Starkov, N.; Vladimirov, M. S.; Umatov, V. I.

doi:10.1016/j.nima.2010.03.149

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…The feasibility of using nuclear emulsions with molybdenum filling to search for ββ decay was shown in [1]. Assessment of the background conditions done in [2] showed the possibility of achieving the sensitivity to 0νββ decay of 100 Mo at the level of ∼ 1.5 • 10 24 years in one year of measurements for 1 kg of 100 Mo.…”

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confidence: 99%

Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Barabash

Bradnová

Dubinina

et al. 2012

Bull. Lebedev Phys. Inst.

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The path lengths of monochromatic muons emerging in the π → µνµ decay were measured by the coordinate method with the view to determine their energy by path length. The dispersion of muon energy measurements by this method was σµ = (0.11 ± 0.01) MeV, which corresponds to the accuracy of σ ≈ 2.7% of the energy of a charged particle estimated by its path length in nuclear emulsion. The developed method will enable measurements of electron energies in 2β decay (∼ 3 MeV) to an accuracy of σ ≈ 5%.

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confidence: 99%

Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Barabash

Bradnová

Dubinina

et al. 2012

Bull. Lebedev Phys. Inst.

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“…Using emulsion chambers layered with ββ decay source foils was discussed in [3]. We proposed an experiment [4] which made use of a nuclear emulsion with molybdenum ( 100 Mo) filling for ββ decay observation. The main advantage of this technique is the visualization of events and the possibility to measure all decay characteristics: total energy, energy of every electron and a decay angle between electrons.…”

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confidence: 99%

“…In our experiment, fine powder (Mo, 2 − 4 µm) was mixed with nuclear emulsion during its preparation. Details of preliminary tests and estimates of expected results of using nuclear emulsions with 100 Mo filling were published in [4].…”

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confidence: 99%

“…The present work provides the results of assessing the possibility of excluding some backgrounds that simulate ββ decay in the configuration of the experiment proposed in [4]. Figure 1 shows a real micrograph of conglomerates (stucktogether grains) of fine-grain commercial Mo powder in nuclear emulsion and a simulation of the escape of two electrons with various energies from Mo.…”

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Measurement of $ββ$ Decay-Simulating Events in Nuclear Emulsion with Molybdenum Filling

Ashitkov,

Barabash,

Bradnova

et al. 2011

Preprint

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The measurement of positron-nucleus collisions was used to estimate the possibility of suppressing background events that simulate ββ decay in the emulsion region adjacent to molybdenum conglomerates. The range of the escape of two relativistic particles from the interaction was found to be < d >= (0.60 ± 0.03) µm, which approximately corresponds to the grain size of developed nuclear emulsion. No correlation of the values of d with the angle between two relativistic particles was observed. It was shown that it was possible to exclude ββ decay background from electrons emerging in the decay of elements of naturally occurring radioactive chains. The background from β decays of 90 Sr and 40 K available in emulsion around Mo conglomerates was determined by the ratio of the volume (∼ d 3 ) to the total volume of emulsion and was found to be 1.5 • 10 −2 . It was shown that the backgrounds from 40 K, 90 Sr and natural radioactivity could be significantly suppressed and would not limit the sensitivity of the experiment with 1 kg 100 Mo.

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Measurements of events simulating 2β-decay using a nuclear photoemulsion with molybdenum filling

Ashitkov

Barabash

Bradnová

et al. 2011

Bull. Lebedev Phys. Inst.

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Nuclear emulsion with molybdenum filling for observation of ββ decay

Abstract: The usage of nuclear emulsion with molybdenum filling for observation of ββ decay are shown to be possible. Estimates for 1 kg of 100 Mo with zero background give the sensitivity for the 0νββ decay of 100 Mo at the level of ∼ 1.5 · 10 24 y for 1 year of measurement.

Cited by 3 publications

References 9 publications

Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Measurement of $ββ$ Decay-Simulating Events in Nuclear Emulsion with Molybdenum Filling

Measurements of events simulating 2β-decay using a nuclear photoemulsion with molybdenum filling

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