M. Salathe
A5012226509- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Atomic and Molecular Physics
- Robotics and Sensor-Based Localization
- Radioactivity and Radon Measurements
- Nuclear Physics and Applications
- Advanced X-ray and CT Imaging
- 3D Surveying and Cultural Heritage
- Geophysical Methods and Applications
- Advanced Neural Network Applications
- Remote-Sensing Image Classification
- Astronomical and nuclear sciences
- Radioactive contamination and transfer
- Advanced Chemical Physics Studies
- High-Energy Particle Collisions Research
- Enzyme Structure and Function
- Medical Image Segmentation Techniques
- Quantum Chromodynamics and Particle Interactions
- Remote Sensing and LiDAR Applications
Lawrence Berkeley National Laboratory
2016-2024
Williams (United States)
2021
University of California, Berkeley
2021
William & Mary
2021
Max Planck Institute for Nuclear Physics
2013-2019
Max Planck Institute for Physics
2015-2017
Max Planck Innovation
2013-2015
Max Planck Society
2013-2015
Paul Scherrer Institute
2011-2015
École Polytechnique Fédérale de Lausanne
2011
Neutrinoless double beta decay is a process that violates lepton number conservation. It predicted to occur in extensions of the standard model particle physics. This Letter reports results from phase I Germanium Detector Array (GERDA) experiment at Gran Sasso Laboratory (Italy) searching for neutrinoless isotope $^{76}\mathrm{Ge}$. Data considered present analysis have been collected between November 2011 and May 2013 with total exposure 21.6 kg yr. A blind performed. The background index...
A search for neutrinoless $\beta\beta$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at Laboratori Nazionali del Gran Sasso INFN (Italy). Processes spectral indices n = 1, 2, 3, 7 were searched for. No signals found and lower limits order 10$^{23}$ yr on their half-lives derived, yielding substantially improved results compared to previous experiments $^{76}$Ge. new result half-life...
The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay 76Ge. signature signal a monoenergetic peak 2039 keV, Q-value decay, Q_bb. To avoid bias in search, present analysis does not consider all those events, that fall 40 keV wide region centered around main parameters needed are described. A background model was developed to describe observed energy spectrum. contains several contributions,...
The GERDA experiment located at the LNGS searches for neutrinoless double beta (0\nu\beta\beta) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I eight semi-coaxial five BEGe type detectors have been deployed. latter is used in this field research first time. All are made from material with enriched fraction. experimental sensitivity can be improved by analyzing pulse shape detector signals aim to reject background events. This paper documents algorithms developed...
One of the most exotic light neutron-rich nuclei currently accessible for experimental study is 40Mg, which lies at intersection nucleon magic number N=28 and neutron drip line. Low-lying excited states 40Mg have been studied first time following a one-proton removal reaction from 41Al, performed Radioactive Isotope Beam Factory RIKEN Nishina Center with DALI2 γ-ray array ZeroDegree spectrometer. Two transitions were observed, suggesting an excitation spectrum that shows unexpected...
The GERDA collaboration is performing a sensitive search for neutrinoless double beta decay of $^{76}$Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. upgrade experiment from Phase I to II has been concluded in December 2015. first data release shows that goal suppress background by one order magnitude compared achieved. thus will remain background-free up its design exposure (100 kg yr). It reach thereby half-life sensitivity more than 10$^{26}$ yr within 3 years collection. This...
The GERmanium Detector Array (Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for neutrinoless double beta decay ( $$0\nu \beta $$ ) of $$^{76}$$ Ge. Germanium detectors made material with an enriched Ge fraction act simultaneously as sources and this decay. During Phase I theexperiment mainly refurbished semi-coaxial from former experiments were used. For upcoming II, 30 new broad energy germanium (BEGe)-type produced. A subgroup these has already been deployed in Gerda...
The primary goal of the GERmanium Detector Array (Gerda) experiment at Laboratori Nazionali del Gran Sasso INFN is search for neutrinoless double beta decay 76 Ge.High-purity germanium detectors made from material enriched in Ge are operated directly immersed liquid argon, allowing a substantial reduction background with respect to predecessor experiments.The first 5.04 kg•yr data collected Phase I have been analyzed measure half-life neutrinoaccompanied Ge.The observed spectrum energy range...
The Parallel Robotics Inspired Goniometer (PRIGo) is a novel compact and high-precision goniometer providing an alternative to (mini-)kappa, traditional three-circle goniometers Eulerian cradles used for sample reorientation in macromolecular crystallography. Based on combination of serial parallel kinematics, PRIGo emulates arc. It mounted air-bearing stage rotation around ω consists four linear positioners working synchronously achieve x, y, z translations χ (0-90°), followed by ϕ (0-360°)...
A model-independent technique was used to determine the $\gamma$-ray Strength Function ($\gamma$SF) of $^{56}$Fe down energies less than 1 MeV for first time with GRETINA using $(p,p')$ reaction at 16 MeV. No difference observed in energy dependence $\gamma$SF built on $2^{+}$ and $4^{+}$ final states, supporting Brink hypothesis. In addition, angular distribution polarization measurements were performed. The distributions are consistent dipole radiation. results show a small bias towards...
An optimized digital shaping filter has been developed for the Gerda experiment which searches neutrinoless double beta decay in $$^{76}$$ Ge. The Phase I energy calibration data have reprocessed and an average improvement of 0.3 keV resolution (FWHM) corresponding to 10 % at $$Q$$ value $$0\nu \beta $$ Ge is obtained. This possible thanks enhanced low-frequency noise rejection this Zero Area Cusp (ZAC) signal filter.
The nucleus ${}^{32}$Mg sits within the so-called island of inversion. In simplest terms, ground state (nominally a closed neutron, $N=20$, shell) is dominated by components involving neutrons excited to next higher, $p\phantom{\rule{0}{0ex}}f$ shell. Extended shell-model calculations show that particle-hole states (0p0h, 2p2h, and 4p4h) are important. present work demonstrates ${}^{30}$Mg($t$,$p$)${}^{32}$Mg two-neutron transfer cross sections first two ${0}^{+}$ can be understood in simple...
The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso INFN (Italy). In first phase experiment, a 90% confidence level (C.L.) sensitivity 2.4⋅1025 yr on 0νββ half-life was achieved with 21.6 kg⋅yr exposure and unprecedented background index region interest 10−2 counts/(keV⋅kg⋅yr). No excess signal events found, experimental lower limit 2.1 ⋅ 1025 (90% C.L.) established....
Networked detector systems can be deployed in urban environments to aid the detection and localization of radiological and/or nuclear material. However, effectively responding interpreting a alarm using spectroscopic data alone may hampered by lack situational awareness, particularly complex environments. This study investigates use Light Detection Ranging (LiDAR) streaming video enable real-time object tracking, fusion this tracking information with for purposes enhanced awareness increased...
HEROICA (Hades Experimental Research Of Intrinsic Crystal Appliances) is an infrastructure to characterize germanium detectors and has been designed constructed at the HADES Underground Laboratory, located in Mol (Belgium). Thanks 223 m overburden of clay sand, muon flux lowered by four orders magnitude. This natural shield minimizes exposure radio-pure material cosmic radiation resulting a significant suppression cosmogenic activation detectors. The project strongly motivated special...
Two neutrino double beta decay of $^{76}$Ge to excited states $^{76}$Se has been studied using data from Phase I the GERDA experiment. An array composed up 14 germanium detectors including that have isotopically enriched in was deployed liquid argon. The analysis various possible transitions final is based on coincidence events between pairs where a de-excitation $\gamma$ ray detected one detector and two electrons other. No signal observed an event counting profile likelihood used determine...
Spectroscopic factors in $^{10}\mathrm{Be}$, $^{11}\mathrm{Be}$, and $^{12}\mathrm{Be}$, extracted from $(d,p)$, one-neutron knockout, $(p,d)$ reactions, are interpreted within the rotational model. Assuming that ground state first excited of $^{11}\mathrm{Be}$ can be associated with $\frac{1}{2}[220]$ $\frac{1}{2}[101]$ Nilsson levels, strong-coupling limit gives simple expressions relate amplitudes these wave functions (in spherical basis) measured cross sections derived spectroscopic...
Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number violation and the Majorana nature neutrinos. A search for neutrinoless $$^{36}$$ Ar has been performed with germanium detectors installed in liquid argon using data from Phase I GERmanium Detector Array (Gerda) experiment at Gran Sasso Laboratory INFN, Italy. No signal was observed an experimental lower limit on half-life radiative established: $$T_{1/2} > $$ 3.6 $$\times 10 $$^{21}$$...
The GERmanium Detector Array (Gerda) is a low background experiment located at the Laboratori Nazionali del Gran Sasso in Italy, which searches for neutrinoless double-beta decay of
Internal contaminations of $^{238}$U, $^{235}$U and $^{232}$Th in the bulk high purity germanium detectors are potential backgrounds for experiments searching neutrinoless double beta decay $^{76}$Ge. The data from GERDA Phase~I have been analyzed alpha events chain these by looking full chains time correlations between successive decays same detector. No candidate a found. Upper limits on activities range few nBq/kg $^{226}$Ra, $^{227}$Ac $^{228}$Th, long-lived daughter nuclides $^{232}$Th,...