Thermal properties of holmium-implanted gold films for a neutrino mass experiment with cryogenic microcalorimeters

Prasai, K.; Alves, E.; Bagliani, D.; Yanardag, S. Basak; Biasotti, M.; Galeazzi, M.; Gatti, F.; Gomes, M. L.; Rocha, Jorge V.; Uprety, Y.

doi:10.1063/1.4816640

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…First of all it compensates for the sputtering of the detector absorber caused by the impinging holmium ion beam which limits the maximum embeddable 163 Ho activity to few becquerels as shown by our SRIM [23] simulations; simulations carried independently by the ECHo collaboration reached similar conclusions [24]. Second it can be used to control the local holmium concentration in the gold absorber: in fact too high concentrations might give rise to an excess heat capacity due to hyperfine level splitting [25].…”

Section: Holmium-163 Embeddingmentioning

confidence: 53%

High-resolution high-speed microwave-multiplexed low temperature microcalorimeters for the HOLMES experiment

et al. 2019

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We present the first performance results obtained with microwave multiplexed Transition Edge Sensors prototypes specifically designed for the HOLMES experiment, a project aimed at directly measuring the electron neutrino mass through the calorimetric measurement of the 163 Ho electron capture spectrum. The detectors required for such an experiment feature a high energy resolution at the Qvalue of the transition, around ∼ 2.8 keV, and a fast response time combined with the compatibility to be multiplexed in large arrays in order to collect a large statistics while keeping the pileup contribution as small as possible. In addition, the design has to be suitable for future ion-implantation of 163 Ho. The results obtained in these tests allowed us to identify the optimal detector design among several prototypes. The chosen detector achieved an energy resolution of (4.5 ± 0.3) eV on the chlorine K α line, at ∼ 2.6 keV, obtained with an exponential rise time of 14 µs. The achievements described in this paper pose a milestone for the HOLMES detectors, setting a baseline for the subsequent developments, aiming to the actual ion-implantation of the 163 Ho nuclei. In the first section the HOLMES experiment is outlined along with its physics goal, while in the second section the HOLMES detectors are described; the experimental setup and the calibration source used for the measurements described in this paper are reported in Sects. 3 and 4, respectively; finally, the details of the data analysis and the results obtained are reported in Sect. 6.

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Section: Holmium-163 Embeddingmentioning

confidence: 53%

High-resolution high-speed microwave-multiplexed low temperature microcalorimeters for the HOLMES experiment

et al. 2019

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“…2. Laboratories should collaborate to examine the reliability (and validity) of different coding schemes, preferable on openly available data sets (Kleinberg, Nahari, Arntz, & Verschuere, 2017;Kleinberg, van der Toolen, Vrij, Arntz, & Verschuere, 2018;Mihalcea, Narvaez, & Burzo, 2014;Ott, Choi, Cardie, & Hancock, 2011;Ott et al, 2013; P erez-Rosas, Abouelenien, Mihalcea, & Burzo, 2015). 3.…”

Section: Commentary #4 By Masip: the Need To Complement Cbca (And Rm)mentioning

confidence: 99%

‘Language of lies’: Urgent issues and prospects in verbal lie detection research

Nahari

Ashkenazi²,

Fisher

et al. 2019

Legal Criminol Psychol

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Since its introduction into the field of deception detection, the verbal channel has become a rapidly growing area of research. The basic assumption is that liars differ from truth tellers in their verbal behaviour, making it possible to classify them by inspecting their verbal accounts. However, as noted in conferences and in private communication between researchers, the field of verbal lie detection faces several challenges that merit focused attention. The first author therefore proposed a workshop with the mission of promoting solutions for urgent issues in the field. Nine researchers and three practitioners with experience in credibility assessments gathered for 3 days of discussion at Bar‐Ilan University (Israel) in the first international verbal lie detection workshop. The primary session of the workshop took place the morning of the first day. In this session, each of the participants had up to 10 min to deliver a brief message, using just one slide. Researchers were asked to answer the question: ‘In your view, what is the most urgent, unsolved question/issue in verbal lie detection?’ Similarly, practitioners were asked: ‘As a practitioner, what question/issue do you wish verbal lie detection research would address?’ The issues raised served as the basis for the discussions that were held throughout the workshop. The current paper first presents the urgent, unsolved issues raised by the workshop group members in the main session, followed by a message to researchers in the field, designed to deliver the insights, decisions, and conclusions resulting from the discussions.

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“…Indeed, in microcalorimeters with metallic absorbers such as gold, the relatively high concentration of holmium (J = 7/2) could cause an excess heat capacity due to hyperfine level splitting in the metallic host [62] and thereby degrade the microcalorimeter performance. Low temperature measurements have been already carried out in the framework of the MARE project to assess the gold absorber heat capacity (at temperatures < 150 mK), both with holmium and erbium implanted ions [129]. Those tests did not show any excess heat capacity, but more sensitive investigations need to be carried out.…”

Section: Calorimetric Absorption Spectrum Of 163 Ho Ecmentioning

confidence: 99%

The Use of Low Temperature Detectors for Direct Measurements of the Mass of the Electron Neutrino

Nucciotti

2016

Advances in High Energy Physics

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Recent years have witnessed many exciting breakthroughs in neutrino physics. The detection of neutrino oscillations has proved that neutrinos are massive particles but the assessment of their absolute mass scale is still an outstanding challenge in today particle physics and cosmology. Since low temperature detectors were first proposed for neutrino physics experiments in 1984, there have been tremendous technical progresses: today this technique offers the high energy resolution and scalability required to perform competitive experiments challenging the lowest electron neutrino masses. This paper reviews the thirty-year effort aimed at realizing a calorimetric measurements with sub-eV neutrino mass sensitivity using low temperature detectors.

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Thermal properties of holmium-implanted gold films for a neutrino mass experiment with cryogenic microcalorimeters

Cited by 6 publications

References 12 publications

High-resolution high-speed microwave-multiplexed low temperature microcalorimeters for the HOLMES experiment

High-resolution high-speed microwave-multiplexed low temperature microcalorimeters for the HOLMES experiment

‘Language of lies’: Urgent issues and prospects in verbal lie detection research

The Use of Low Temperature Detectors for Direct Measurements of the Mass of the Electron Neutrino

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