Possible background reductions in double beta decay experiments

The background induced by radioactive impurities of $^{208}\rm Tl$ and $^{214}\rm Bi$ in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also be applied to other double beta decay experiments capable of measuring independently the energies of the two electrons.Comment: 15 pages, 13 figures, accepted in the Nuclear Instruments and Methods

Public Making: Artistic Strategies for Working with Museum Collections, Technologies and Publics

This paper discusses the principle of ‘Public Making’, a strategy of conducting a creative process while working in and with the public to build artistic work. By first laying out a conceptual and theoretical framework around our intentions, this essay goes on to describe our practice through a significant program of work carried out during 2014. Our work included an artistic residency, two installations and a durational performance. The paper culminates on reflections into how Public Making opens up the artistic process and allows for multiple forms of participatory engagement to occur. This work was carried out on a variety of occasions with various cultural institutions including museums, heritage sites and arts organisations. This concept of building and making in and with the public attempts to open the ‘black box’ of creation allowing publics to engage with technological methods alongside an artistic process

The BiPo detector for ultralow radioactivity measurements

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in 208Tl and 214Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 m2 of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in 208Tl. After more than one year of background measurement, a surface activity of the scintillators of A(208Tl) = 1.5 \muBq/m2 is reported here. Given this level of background, a larger BiPo3 detector having 3.25 m2 of active surface area, will able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of A(208Tl) < 3-4 \mu Bq/kg (90% C.L.) with a six month measurement. This detector is actually under construction and will be installed in the Canfranc Underground Laboratory mid 2011.Comment: Proceeding - Low Radioactivity Techniques (LRT) Workshop - SNOLab - 201

Latest results from a search for neutrinoless double beta decay with NEMO3 and plans for SuperNEMO

for the SuperNEMO CollaborationInternational audienceExperimental search for the neutrinoless double beta decay (0ν β β ) is of major importance in particle physics because if observed, it will reveal the Ma jorana nature of the neutrino (ν ≡ ¯ ν ) and may allow an access to the absolute neutrino mass scale. The decay violates the lepton number and is therefore a direct indication for physics beyond the Standard Model. The existence of this process may be related to right-handed currents in electroweak interactions, supersymmetric particles with R-parity nonconservation, and massless Goldstone bosons, such as majorons

Collab-Hub: A system for creating collaborative telematic music performances with web-based instruments and creative development platforms

Collab-Hub is a networking tool for sharing data across the internet for multimedia collaboration. Through CollabHub, web audio applications, custom hardware controllers/instruments, and digital instruments created for embedded and desktop computers can all be designed around a single framework, providing a unified approach to creating multi-modal networked experiences. In this talk, we discuss the design of the Collab-Hub system and provide examples of using it to create interaction layouts between web-based instruments/interfaces and digital musical instruments designed in Max and Pure Data. We also showcase custom APIs for developing audiovisual software clients in Unity and hardware clients through Arduino. An analysis of pertinent historical precedents highlights the advantages Collab-Hub provides to artists who may not have experience developing collaborative projects between browsers and desktop software or may be entirely new to designing telematic and remote performance environments. A showcase of works created with Collab-Hub (featuring networked interactivity across the internet, digital instrument design through the aforementioned creative development platforms and the WebAudio API, and multimodal art technologies) demonstrates the wide variety of artistic endeavors made possible through the framework

Results from the search for neutrinoless double beta decay with NEMO-3 and The SuperNEMO project

International audienceThe NEMO-3 experiment located in the Modane Underground Laboratory (LSM) is searching for neutrinoless double beta decay. The experiment has been taking data since 2003 with a range of isotopes. The main isotopes are ~ 7 kg of 100Mo and ~ 1 kg of 82Se. Since no evidence for neutrinoless double beta decay has been found, a 90% Confidence Level lower limit on the half-life of this process is derived. From this we determine an upper limit on the effective Majorana neutrino mass. New results using 150Nd, an isotope of special interest due to its potential use in future experiments, will also be presented. The data are also interpreted in terms of alternative models, such as weak right-handed currents or Majoron emission. NEMO-3 has also performed precision measurements of the standard model double beta decay process for several isotopes. Measurements of this process are important for reducing the uncertainties on nuclear matrix elements. A precise measurement of the half-life for the double beta decay of 130Te and a comparison with the conflicting results from geochemical experiments has also been performed. The most recent experimental results of NEMO-3 will be presented

Supplementary data for the article: Antonijević, I. S.; Janjić, G. V.; Milčić, M. K.; Zarić, S. D. Preferred Geometries and Energies of Sulfur-Sulfur Interactions in Crystal Structures. Crystal Growth and Design 2016, 16 (2), 632–639. https://doi.org/10.1021/acs.cgd.5b01058

Supplementary material for: [https://doi.org/10.1021/acs.cgd.5b01058]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2042]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3596