A search for 0νββ decay of 124Sn with tin-loaded liquid scintillator

Hwang, Mun Kyung; Kwon, Y.; Kim, H.J.; Kwak, Jungwon; Kim, S.C.; Kim, S.K.; Kim, T.Y.; Kim, S.Y.; Lee, H.S.; Lee, Mi Jung; Myung, S. S.; Kim, Y.D.; Lee, J.I.; Kang, W. G.; Hahn, I. S.; Lee, M.H.

doi:10.1016/j.astropartphys.2009.05.001

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…As we mentioned in the Introduction, double-beta decay modes of 124 Sn were recently investigated experimentally by several groups [28][29][30][31]. The emphasis was on decays to the excited states, but no signal has been seen so far.…”

Section: Nuclear Matrix Elements Formentioning

confidence: 99%

“…As a consequence, the phase space factor (see below) for 2νββ decay of 124 Sn is about ten times larger than that of 76 Ge, while the 0νββ phase space factor of 124 Sn is about four times larger than that of 76 Ge. Double-beta decay modes of 124 Sn were also recently investigated experimentally by several groups [28][29][30][31], but no signal has been seen so far. The best upper limit obtained was about 1×10…”

Section: Introductionmentioning

confidence: 99%

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Shell model predictions forSn124double-βdecay

Horoi¹,

Neacsu²

2016

Phys. Rev. C

129

194

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Neutrinoless double-beta (0νββ) decay is a promising beyond Standard Model process. Twoneutrino double-beta (2νββ) decay is an associated process that is allowed by the Standard Model, and it was observed in about 10 isotopes, including decays to the excited states of the daughter.124 Sn was the first isotope whose double-beta decay modes were investigated experimentally, and despite few other recent efforts, no signal has been seen so far. Shell model calculations were able to make reliable predictions for 2νββ decay half-lives. Here we use shell model calculations to predict the 2νββ decay half-life of 124 Sn. Our results are quite different from the existing quasiparticle randomphase approximation (QRPA) results, and we envision that they will be useful for guiding future experiments. We also present shell model nuclear matrix elements for two potentially competing mechanisms to the 0νββ decay of 124 Sn.

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Section: Nuclear Matrix Elements Formentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shell model predictions forSn124double-βdecay

Horoi¹,

Neacsu²

2016

Phys. Rev. C

129

194

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“…However, to accumulate adequate detection events to provide sufficient statistics in a reasonable time period, the liquid scintillator must contain the candidate isotope at concentrations in the range of 0.1–10 wt.% [ 5 ] without severe degradation of the optical properties of the liquid scintillator. Several research groups have developed metal-loaded liquid scintillators by dissolving organometallic molecules that contain the candidate isotope [ 5 , 6 , 7 , 8 ]; however, the excited state can be quenched by these incorporated molecules, resulting in the reduction of the scintillation light yield. Moreover, the concentration of candidate isotopes is limited by the solubility of the metal compound and some of the incorporated molecules may be degraded via photo-induced oxidation in the presence of oxygen [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Liquid Scintillators Loaded with 6-Phenylhexanoic Acid-Modified ZrO2 Nanoparticles for Observation of Neutrinoless Double Beta Decay

et al. 2021

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The observation of neutrinoless double beta decay is an important issue in nuclear and particle physics. The development of organic liquid scintillators with high transparency and a high concentration of the target isotope would be very useful for neutrinoless double beta decay experiments. Therefore, we propose a liquid scintillator loaded with metal oxide nanoparticles containing the target isotope. In this work, 6-phenylhexanoic acid-modified ZrO2 nanoparticles, which contain 96Zr as the target isotope, were synthesized under sub/supercritical hydrothermal conditions. The effects of the synthesis temperature on the formation and surface modification of the nanoparticles were investigated. Performing the synthesis at 250 and 300 °C resulted in the formation of nanoparticles with smaller particle sizes and higher surface modification densities than those prepared at 350 and 400 °C. The highest modification density (3.1 ± 0.2 molecules/nm2) and Zr concentration of (0.33 ± 0.04 wt.%) were obtained at 300 °C. The surface-modified ZrO2 nanoparticles were dispersed in a toluene-based liquid scintillator. The liquid scintillator was transparent to the scintillation wavelength, and a clear scintillation peak was confirmed by X-ray-induced radioluminescence spectroscopy. In conclusion, 6-phenylhexanoic acid-modified ZrO2 nanoparticles synthesized at 300 °C are suitable for loading in liquid scintillators.

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“…Searches for β + EC and EC-EC processes in 112 Sn were also carried out by Kidd et al [25] and Barabash et al [26,27] using enriched material obtaining the best half-life limit of 10 21 years. The Kims collaboration [28] gave a half-life limit 2.0×10 20 years for neutrino-less double beta decay of 124 Sn using tin-loaded liquid…”

Section: Introductionmentioning

confidence: 99%

Preliminary study of feasibility of an experiment looking for excited state double beta transitions in tin

Das¹,

Ghorui²,

Raina³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tAn attempt to study the feasibility of a new experiment to search for double beta decay in 112 Sn and 124 Sn was carried out by using ultra-low background HPGe detector (244 cm 3 ) inside the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). A small sample of natural Sn was examined for 2367.5 h. The radioactive contamination of the sample has been estimated. The data has also been considered to calculate the present sensitivity for the proposed search; half-life limits $ 10 17 -10 18 years for β þ EC and EC-EC processes in 112 Sn and $ 10 18 years for β À β À transition in 124 Sn were measured. In the last section of the paper the enhancement of the sensitivity for a proposed experiment with larger mass to reach theoretically estimated values of half-lives is discussed.

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A search for 0νββ decay of 124Sn with tin-loaded liquid scintillator

Cited by 11 publications

References 32 publications

Shell model predictions forSn124double-βdecay

Shell model predictions forSn124double-βdecay

Fabrication of Liquid Scintillators Loaded with 6-Phenylhexanoic Acid-Modified ZrO2 Nanoparticles for Observation of Neutrinoless Double Beta Decay

Preliminary study of feasibility of an experiment looking for excited state double beta transitions in tin

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