Smart block copolymers as fluorescence chemosensors of copper ions with high detection efficiency

A detector upgrade was carried out on the PLATYPUS instrument dedicated to neutron reflectometry at the Australian Nuclear Science and Technology Organisation (ANSTO). The new detector, developed in the framework of a research collaboration between the ILL and ANSTO, is based on the Monoblock Aluminium Multi-tube (MAM) detector design already in use on several reflectometers and SANS instruments at the ILL. This article provides a technical description of the mechanical design and read-out electronics of the PLATYPUS detector and its commissioning on the PLATYPUS instrument. The main detector performance parameters have been measured and are presented here as well as the characterisation methods and the results of several reflectometry measurements. These measurements show an improvement in experimental data quality resulting from high positional resolution, high detection efficiency and reduced neutron scattering background in the 2.5–19 Å neutron wavelength range used in PLATYPUS instrument.

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Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers

International Journal of Modern Physics A ◽

10.1142/s0217751x18430030 ◽

2018 ◽

Vol 33 (09) ◽

pp. 1843003 ◽

Cited By ~ 7

Author(s):

Fabio Bellini

Keyword(s):

Nuclear Physics ◽

Detection Efficiency ◽

Neutrinoless Double Beta Decay ◽

Double Beta Decay ◽

Particle Identification ◽

X Ray ◽

High Detection ◽

High Detection Efficiency ◽

Hybrid Devices ◽

Excellent Energy Resolution

Bolometers are cryogenic calorimeters which feature excellent energy resolution, low energy threshold, high detection efficiency, flexibility in choice of materials, particle identification capability if operated as hybrid devices. After 30 years of rapid progresses, they represent nowadays a leading technology in several fields: particle and nuclear physics, X-ray astrophysics, cosmology. However, further and substantial developments are required to increase the sensitivity to the levels envisioned by future researches. A review of the challenges to be addressed and potentialities of bolometers in the search for rare nuclear decays is given, with particular emphasis to the neutrinoless double beta decay physics case.

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Movements of mottled sculpins (Cottus bairdii) in a Michigan stream: how restricted are they?

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f08-189 ◽

2009 ◽

Vol 66 (1) ◽

pp. 31-41 ◽

Cited By ~ 54

Author(s):

Matthew J. Breen ◽

Carl R. Ruetz ◽

Kurt J. Thompson ◽

Steven L. Kohler

Keyword(s):

Home Range ◽

Standard Error ◽

Small Proportion ◽

Detection Efficiency ◽

Maximum Displacement ◽

Passive Integrated Transponder ◽

Seasonal Movement ◽

High Detection ◽

High Detection Efficiency ◽

Movement Distance

We monitored 94 mottled sculpins ( Cottus bairdii ) marked with passive integrated transponder (PIT) tags to examine seasonal movement patterns. High detection efficiency (mean ± standard error = 0.76 ± 0.03) of PIT-tagged fish was obtained with a portable antenna. Nighttime searches were more effective than daytime relocations in summer, and smaller fish (<65 mm) were detected more readily than larger fish (≥65 mm). Sculpins used erosional habitats more than depositional habitats, particularly during summer and nighttime. Search attempts within a 150 m reach showed that displacement, mean movement distance, and home range did not differ significantly between summer and winter, suggesting that season did not strongly influence movement. Additionally, movement metrics were unrelated to sculpin size. However, supplementary searches of a larger reach (700 m) showed that 16% of PIT-tagged fish moved more than 100 m over 1 year, with a maximum displacement of 511 m, and mobile fish typically displayed upstream bias. Although most mottled sculpins in our system were relatively sedentary, a small proportion of individuals moved further than previously reported for other systems.

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