Double beta decay and dark matter in the Gotthard germanium experiment

Treichel, M.; Boehm, F.; Broggini, C.; Reusser, D.; Fisher, P. H.; Fluri, L.; Gabathuler, K.; Henrikson, H.; Jörgens, V.; Mitchell, L.W.; Nussbaum, C.; Vuilleumier, J. L.

doi:10.1088/0954-3899/17/s/020

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The final result from 3,820 h of this essentially above-ground experiment was T 0ν 1/2 ≥1.9 • 10 22 yr (68% CL) [32]. The next experiment involving the Caltech group was in collaboration with the University of Neuchâtel and Paul Scherrer Institute [38]. It involved 8 high-purity 140-cm 3 Ge detectors, with a combined volume of 1,095 cm 3 or 5.83 kg.…”

Section: The Caltech and The Neuchâtel-caltech-psi Experimentsmentioning

confidence: 99%

The Search for Double Beta Decay With Germanium Detectors: Past, Present, and Future

Avignone

Elliott

2019

Front. Phys.

View full text Add to dashboard Cite

Section: The Caltech and The Neuchâtel-caltech-psi Experimentsmentioning

confidence: 99%

The Search for Double Beta Decay With Germanium Detectors: Past, Present, and Future

Avignone

Elliott

2019

Front. Phys.

View full text Add to dashboard Cite

“…The final result from 3820 h of this essentially above-ground experiment was T 0ν 1/2 ≥1.9 • 10 22 yr (68% CL) [32]. The next experiment involving the Caltech group was in collaboration with the University of Neuchâtel and Paul Scherrer Institute [38]. It involved 8 high-purity 140-cm 3 Ge detectors, with a combined volume of 1095 cm 3 or 5.83 kg.…”

Section: The Caltech and The Neuch âTel-caltech-psi Experimentsmentioning

confidence: 99%

Ge Detectors and $0νββ$: The Search for Double Beta Decay with Germanium Detectors: Past, Present and Future

Avignone,

Elliott

2019

Preprint

View full text Add to dashboard Cite

High Purity Germanium Detectors have excellent energy resolution; the best among the technologies used in double beta decay. Since neutrino-less double beta decay hinges on the search for a rare peak upon a background continuum, this strength has enabled the technology to consistently provide leading results. The Ge crystals at the heart of these experiments are very pure; they have no measurable U or Th contamination. The added efforts to reduce the background associated with electronics, cryogenic cooling, and shielding have been very successful, leading to the longevity of productivity. The first experiment published in 1967 by the Milan group of Fiorini, established the benchmark half-life limit > 3 × 10 20 yr. This bound was improved with the early work of the USC-PNNL, UCSB and Milan groups yielding limits above 10 23 yr. The Heidelberg-Moscow and USC-PNNL collaborations pioneered the use of enriched Ge for detector fabrication. Both groups also initiated techniques of analyzing pulse waveforms to reject γ-ray background. These steps extended the limits to just over 10 25 yr. In 2000, a subset of the Heidelberg-Moscow collaboration claimed the observation of double beta decay. More recently, the MAJORANA and GERDA collaborations have developed new detector technologies that optimize the pulse waveform analysis. As a result, the GERDA collaboration refuted the claim of observation with a revolutionary approach to shielding by immersing the detectors directly in radio-pure liquid argon. In 2018, the MAJORANA collaboration, using a classic vacuum cryostat and high-Z shielding, achieved a background level near that of GERDA by developing very pure materials for use nearby the detectors. Together, GERDA and MAJORANA have provided limits approaching 10 26 yr. In this article, we elaborate on the historical use of Ge detectors for double beta decay addressing the strengths and weaknesses. We also summarize the status and future as many MAJORANA and GERDA collaborators have joined with scientists from other efforts to give birth to the LEGEND collaboration. LEGEND will exploit the best features of both experiments to extend the half-life limit beyond 10 28 yr with a ton-scale experiment.

show abstract

Progress report on the search for cold dark matter using ultralow-background germanium detectors at homestake

Drukier

Avignone

Brodzinski

et al. 1992

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

Double beta decay and dark matter in the Gotthard germanium experiment

Cited by 4 publications

References 4 publications

The Search for Double Beta Decay With Germanium Detectors: Past, Present, and Future

The Search for Double Beta Decay With Germanium Detectors: Past, Present, and Future

Ge Detectors and $0νββ$: The Search for Double Beta Decay with Germanium Detectors: Past, Present and Future

Progress report on the search for cold dark matter using ultralow-background germanium detectors at homestake

Contact Info

Product

Resources

About