scholarly journals Rhenium and iridium targets prepared using a novel graphene loading technique

2020 ◽  
Vol 229 ◽  
pp. 06001
Author(s):  
John P. Greene ◽  
Matthew Gott ◽  
Richard L. Fink ◽  
Igor Pavlovsky
Keyword(s):  
Nuclear Physics ◽  
Gamma Ray ◽  
Graphene Film ◽  
Temperature Tolerance ◽  
Host Matrix ◽  
Target Preparation ◽  
Decay Properties ◽  
High Temperature Tolerance ◽  
Material Choice ◽  
Target Performance

For accelerator targets, graphene films are an excellent material choice due to their high thermal conductivity, high temperature tolerance, low outgassing, mechanical integrity, and ease of handling. A variety of targets have been produced using graphene material as a backing or a host matrix. One of the unique advantages of the graphene film fabrication process is the capability to embed target materials, including refractory metals, in the nanoparticle form into a host graphene matrix during target preparation. Targets of natIr and natRe have been fabricated as nanoparticle loaded graphene targets for use in nuclear physics research. We have obtained beam time to evaluate target performance as well as production yields and nuclear decay properties via the natRe(a,2n)186Ir and natIr(a,3n)194Au reactions, respectively. These rhenium and iridium targets will be irradiated using the ATLAS accelerator and gamma rays measured in-place using the high-precision gamma-ray spectroscopy capabilities of Gammasphere and further analyzed using a multi-parameter detector system. Future plans include the preparation of isotopic targets of these two elements.

scholarly journals Sintering Activated Atomic Palladium Catalysts with High-Temperature Tolerance of ∼1,000°C

2020 ◽  
pp. 100287
Author(s):  
Nating Yang ◽  
Yonghui Zhao ◽  
Hao Zhang ◽  
Weikai Xiang ◽  
Yuhan Sun ◽  
...  
Keyword(s):  
High Temperature ◽  
Palladium Catalysts ◽  
Temperature Tolerance ◽  
High Temperature Tolerance

scholarly journals Selection of cowpea cultivars for high temperature tolerance: physiological, biochemical and yield aspects

2021 ◽  
Author(s):  
Juliane Rafaele Alves Barros ◽  
Miguel Julio Machado Guimarães ◽  
Rodrigo Moura e Silva ◽  
Maydara Thaylla Cavalcanti Rêgo ◽  
Natoniel Franklin de Melo ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Tolerance ◽  
Cowpea Cultivars ◽  
High Temperature Tolerance ◽  
Selection Of

Bioinspired strengthening and toughening carbon nanotube@polyaniline/graphene film using electroactive biomass as glue for high rate, volumetric capacitance and low-temperature tolerance flexible supercapacitor

2021 ◽  
Author(s):  
Dan Wu ◽  
Chuying Yu ◽  
Wenbin Zhong
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Graphene Film ◽  
Temperature Tolerance ◽  
High Rate ◽  
Flexible Supercapacitor ◽  
Low Temperature Tolerance ◽  
Electrical Devices ◽  
Brick And Mortar ◽  
Volumetric Capacitance

Natural nacre built up with brick-and-mortar architecture, exhibiting extraordinary strength and toughness, provides an inspiration to construct high-performance multifunctional film for flexible energy storage and portable electrical devices. In the...

GAMMA-RAY SPECTROSCOPY AT GANIL

2006 ◽  
Vol 15 (08) ◽  
pp. 1957-1965
Author(s):  
G. DE FRANCE
Keyword(s):  
Reaction Mechanism ◽  
Nuclear Structure ◽  
Nuclear Physics ◽  
Gamma Ray ◽  
Gamma Ray Spectroscopy ◽  
Comprehensive Picture ◽  
Clear Identification

Gamma-ray spectroscopy associated to the clear identification of the emitting nuclei is a key to understand in a coherent way the nuclear structure of the elements located far from stability. The coupling of very efficient gamma-ray arrays and spectrometers has pushed away the limits and opened up new possibilities in nuclear physics studies. These combinations give access to a comprehensive picture of both the reaction mechanism and the nuclear structure of a given nucleus. In this talk, the various possibilities offered at GANIL with such a coupling will be given.

An unprecedented high-temperature-tolerance 2D laminar MXene membrane for ultrafast hydrogen sieving

2019 ◽  
Vol 569 ◽  
pp. 117-123 ◽  
Author(s):  
Yiyi Fan ◽  
Luyang Wei ◽  
Xiuxia Meng ◽  
Weimin Zhang ◽  
Naitao Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Tolerance ◽  
High Temperature Tolerance

High temperature tolerance and thermal plasticity in emerald ash borer Agrilus planipennis

2011 ◽  
Vol 13 (3) ◽  
pp. 333-340 ◽  
Author(s):  
Stephanie Sobek ◽  
Arun Rajamohan ◽  
Daniel Dillon ◽  
Robert C. Cumming ◽  
Brent J. Sinclair
Keyword(s):  
High Temperature ◽  
Emerald Ash Borer ◽  
Temperature Tolerance ◽  
Agrilus Planipennis ◽  
Thermal Plasticity ◽  
High Temperature Tolerance

scholarly journals Induksi Mutasi Kalus Embriogenik Gandum (Triticum aestivum L.) melalui Iradiasi Sinar Gamma untuk Toleransi Suhu Tinggi

2015 ◽  
Vol 43 (1) ◽  
pp. 36 ◽  
Author(s):  
Ryan Budi Setiawan ◽  
Nurul Khumaida ◽  
Diny Dinarti
Keyword(s):  
High Temperature ◽  
Embryogenic Callus ◽  
Genetic Improvement ◽  
In Vitro Selection ◽  
Gamma Ray ◽  
Triticum Aestivum L ◽  
Temperature Tolerance ◽  
Randomized Design ◽  
Gamma Ray Irradiation

Mutation techniques through gamma ray irradiation is useful to support breeding programs for genetic improvement of wheat. Genetic improvement on tolerance to high temperatures is necessary for development of wheat in Indonesia. The purpose of this study was to determine the level of radiosensitivity to be used as the basis for the induction of mutations by gamma ray irradiation on embryogenic callus to obtain putative mutants with high temperature tolerance. Explants used were embryogenic callus cultured on MS medium containing 30 g L-1 sukrosa, 2 g L-1 gelrite, 2 mg L-1 2.4D and 1 mg L-1 picloram. Culture incubated for 6 weeks with temperature 20±4 oC in the room culture. Five irradiation doses (10, 20, 30, 40 and 50 Gy) were used in radiosensitivity testing. A factorial, completely randomized design was applied to the experiment. The first factor was selection temperature with three levels (25, 30 and 35 oC), and the second factor was doses of gamma ray iradiation with three levels (10, 20, and 30 Gy). The result showed that radiosensitivity levels varied among varieties, LD20: 7.79 to 18.96 Gy and LD50: 24.29-33.63 Gy. Selayar variety which has highest sensitivity value compared with Dewata and Nias. Increasing doses of iradiation and temperature decrease survival of embryogenic callus, number of embryos, and percentage of germinated plantlets. Based on in vitro selection using high temperature (25, 30, and 35 oC), the obtained 19 putative mutants were derived from embryos that appear on the surface of embryogenic callus survival after irradiation and high temperature selection.<br />Keywords: in vitro selection, putative mutant, radiosensitivity, somatic embryo

scholarly journals Silicon-On-Nothing IR-Emitter for Gas Sensing Applications

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1080
Author(s):  
Vladislav Komenko ◽  
Andrey Kravchenko ◽  
Wolf-Joachim Fischer
Keyword(s):  
Thermal Stability ◽  
Material Properties ◽  
Polycrystalline Silicon ◽  
Gas Sensing ◽  
Low Cost ◽  
Extreme Temperatures ◽  
Sensing Applications ◽  
Material Choice ◽  
Target Performance ◽  
Compact Design

Within the current work, we present a miniaturized IR-Emitter based on Silicon-On-Nothing (SON) technology capable of producing 10 ms pulses. Transition to monocrystalline silicon, as the material choice for the filament, is governed by improved reliability and greater thermal stability as opposed to polycrystalline silicon alternative, commonly used in such class of devices. Compact design, low-cost processing and exceptional filament material properties make the presented device a favorite solution for integrated gas sensing applications. Numerical modeling and measurements of the IR-Emitter are performed to investigate the heating dynamics and assess the structure’s behavior at extreme temperatures as well as confirm the target performance. Additionally, a part of the work is dedicated to cover the insight of used fabrication process and the discussion of further improvements.

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