Readout technologies for directional WIMP Dark Matter detection

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies

A new view to the structure of

The observation of longitudinal momentum distribution (P ||) from two-neutron removal in 19C with a Be target at 64 A MeV is reported. Analysis in terms of Glauber model considering 19Cgs( J π = 1/2+) shows that neutron evaporation is necessary to explain the data

Observation of a two-proton halo in

The measurement of longitudinal momentum distribution for two-proton removal from the proton-drip line nucleus 17Ne with a Be target at 64 A MeV is reported. The observed narrow momentum distribution and the large interaction cross-section suggests the formation of a two-proton halo. The data analyzed within the Few-body Glauber model suggests a significant probability of the two valence protons to abnormally occupy the 2s 1/2 orbit, indicating its lowering in proton-rich nuclei

Evaluation of KEK n-in-p Planar Pixel Sensor Structures for Very High Radiation Environments with Testbeam

Various structures for n-in-p planar pixel sensors have been developed at KEK in order to cope with the huge particle fluence in the upcoming LHC upgrades. Performances of the sensors with different structures have been evaluated with testbeam. The n-in-p devices were connected by bump-bonding to the ATLAS Pixel front-end chip (FE-I4A) and characterized before and after the irradiation to 1×10 16 1 MeV neq/cm2 . Results of measurements with 120 GeV/c momentum pion beam at the CERN Super Proton Synchrotron (SPS) in September 2012 are presented

Evaluation of KEK n-in-p Planar Pixel Sensor Structures for Very High Radiation Environments with Testbeam

Various structures for n-in-p planar pixel sensors have been developed at KEK in order to cope with the huge particle fluence in the upcoming LHC upgrades. Performances of the sensors with different structures have been evaluated with testbeam. The n-in-p devices were connected by bump-bonding to the ATLAS Pixel front-end chip (FE-I4A) and characterized before and after the irradiation to 1×10 16 1 MeV neq/cm2 . Results of measurements with 120 GeV/c momentum pion beam at the CERN Super Proton Synchrotron (SPS) in September 2012 are presented

Evidence of halo structure in 37^{37}Mg observed via reaction cross sections and intruder orbitals beyond the island of inversion

Precise reaction cross sections (σR) for ^<24−38>Mg on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The σR for ^<36−38>Mg have been measured for the first time. An enhancement of σ_R compared to the systematics for spherical stable nuclei has been observed, especially in the neutron-rich region, which reflects the deformation of those isotopes. In the vicinity of the drip line the σ_R for ^<37>Mg is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of σ_R for ^<37>Mg should come from the p-orbital halo formation breaking the N=28 shell gap