Cryogenic Detectors for Rare Alpha Decay Search: A New Approach

Casali, N.; Dubovik, A.M.; Nagorny, S.; Nisi, S.; Orio, F.; Pattavina, L.; Pirro, S.; Schäffner, K.; Tupitsyna, I.A.; Yakubovskaya, A.

doi:10.1007/s10909-016-1507-y

Cited by 16 publications

(14 citation statements)

References 21 publications

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“…A search for 146 Sm could still be pursued in existing detectors that have been doped with Sm or containing Sm as a contaminant. As an example, a ZnWO 4 scintillating bolometer doped with enriched 148 Sm was used in [17] [17]. After enrichment, the 147 Sm was depleted by a factor 0.06 (from 14.99% to 0.91%) and 144 Sm was depleted by a factor 0.02 (from 3.07% to 0.06%).…”

Section: Limits From Sm-doped Detectorsmentioning

confidence: 99%

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
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146 Nd is one of only four (over a total of 35 existing) 2β − decay isotope candidates whose half-lives currently lack experimental limits. The α activity of the 146 Sm daughter nuclide allows placement of limits on the 2β decay using the 146 Nd/ 142 Nd abundance ratio (T ββ 1/2 > ∼ 3×10 9 yr) or direct search for 146 Sm with accelerator mass spectrometers (T ββ 1/2 > ∼ 4.5×10 19 yr). With a similar approach, a modest (∼ Gyr) first limit on half-lives for the other unexplored 2β unstable isotopes and competitive limits (few 10 13 yr) for 98 Mo and 122 Sn are also given. Finally, it is shown how the limit T 0νǫβ + 1/2 > ∼ 10 15 yr for the unexplored 144 Sm 0νǫβ + decay may be obtained from the data of a GSO crystal scintillator.

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Section: Limits From Sm-doped Detectorsmentioning

confidence: 99%

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
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“…3 was recrystallized to study the impact of the second crystallization on the radioactive contamination of cadmium tungstate crystals. As regards the zinc tungstate (ZnWO 4 ) crystal scintillators, they are promising detectors to search for double beta decay [12,13], dark matter [14,15,16], eka-elements [17], and investigation of rare alpha decays [18]. The detector has a very low level of radioactive contamination [19].…”

Section: Introductionmentioning

confidence: 99%

Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization

Barabash

Belli²,

Bernabei

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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“…Recently, the half-life of the α decay of 148 Sm was measured at LNGS with improved accuracy by using a ZnWO 4 scintillating bolometer doped with Sm, isotopically enriched in 148 Sm to 95.54% [69]. A ZnWO 4 : 148 Sm cylindrical crystal with a mass of 22.014 g was used as low temperature scintillating bolometer.…”

Section: Sm α Decaymentioning

confidence: 99%

Experimental searches for rare alpha and beta decays

et al. 2019

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The current status of the experimental searches for rare alpha and beta decays is reviewed. Several interesting observations of alpha and beta decays, previously unseen due to their large half-lives (10 15 − 10 20 yr), have been achieved during the last years thanks to the improvements in the experimental techniques and to the underground locations of experiments that allows to suppress backgrounds. In particular, the list includes first observations of alpha decays of 151 Eu, 180 W (both to the ground state of the daughter nuclei), 190 Pt (to excited state of the daughter nucleus), 209 Bi (to the ground and excited states of the daughter nucleus). The isotope 209 Bi has the longest known half-life of T 1/2 ≈ 10 19 yr relatively to alpha decay. The beta decay of 115 In to the first excited state of 115 Sn (Eexc = 497.334 keV), recently observed for the first time, has the Q β value of only (147 ± 10) eV, which is the lowest Q β value known to-date. Searches and investigations of other rare alpha and beta decays ( 48 Ca, 50 V, 96 Zr, 113 Cd, 123 Te, 178m2 Hf, 180m Ta and others) are also discussed.

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Cryogenic Detectors for Rare Alpha Decay Search: A New Approach

Cited by 16 publications

References 21 publications

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
View full text Add to dashboard Cite

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
View full text Add to dashboard Cite

Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization

Experimental searches for rare alpha and beta decays

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Cryogenic Detectors for Rare Alpha Decay Search: A New Approach

Cited by 16 publications

References 21 publications

Nd146,Sm144 , and other unexplored 2Nozzoli1 2018Phys. Rev. C6031View full textAdd to dashboardCite

Nd146,Sm144 , and other unexplored 2Nozzoli1 2018Phys. Rev. C6031View full textAdd to dashboardCite

Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization

Experimental searches for rare alpha and beta decays

Contact Info

Product

Resources

About

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
View full text Add to dashboard Cite

Nd146,Sm144 , and other unexplored 2
Nozzoli
¹

2018
Phys. Rev. C
6
0
3
1
View full text Add to dashboard Cite