Zobrazeno 1 - 10
of 24
pro vyhledávání: '"David Chvatil"'
Autor:
Jan Kučera, Jan Kameník, Vladimír Havránek, Ivana Krausová, Ivo Světlík, Kateřina Pachnerová Brabcová, Marek Fikrle, David Chvátil
Publikováno v:
Physics, Vol 4, Iss 2, Pp 491-503 (2022)
Five case studies are reported on the use of neutron and photon activation analysis (NAA and PAA, respectively), X-ray fluorescence (XRF) analysis, ion beam analysis (IBA), and accelerator mass spectrometry (AMS) for the elemental characterization or
Externí odkaz:
https://doaj.org/article/fd0acb6462174fdb94d041b94519f43d
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 4, Iss 0, Pp 56-61 (2016)
This article presents the processing of radiographic data acquired using the position-sensitive hybrid semiconductor pixel detector Timepix. Measurements were made on thin samples at the medical ion-synchrotron HIT [1] in Heidelberg (Germany) with a
Externí odkaz:
https://doaj.org/article/5108455bfefc48b0b20f7b6fb4defd7f
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 448:26-30
Total nitrogen content via instrumental photon activation analysis was determined to reveal the matrix composition of the bracelet from the late Bronze Age found in the site (hill fort) Sovi Skaly in Karlovy Vary – Drahovice (Drahovice cadastre, Cz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f750e38ee01f4cdb1e0280fbdfade429
https://doi.org/10.1016/j.nimb.2019.03.057
https://doi.org/10.1016/j.nimb.2019.03.057
Publikováno v:
Nanoscale. 11:18537-18542
Nano-optodes with a diamond core coated with a double stimuli-responsive polymeric shell reversibly respond to pH and temperature changes. Swelling and collapsing of the shell are accompanied by changes in the charge of the polymer. Changes in the fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a3646fcf60cec9423f0fc17f9a0b097
https://doi.org/10.1039/c9nr03710a
https://doi.org/10.1039/c9nr03710a
Autor:
Stepan Polansky, Jan Stursa, David Chvatil, Carlos Granja, Jan Jakubek, Pavel Krist, K. Kudela
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 911:142-152
We evaluate and characterize the directional response of the semiconductor pixel detector Timepix to charged particles and secondary cosmic rays . The detector granularity and per-pixel spectrometric response enable to perform directional sensitive t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74477c5d0ae959b809b0dac11d49fcb1
https://doi.org/10.1016/j.nima.2018.09.140
https://doi.org/10.1016/j.nima.2018.09.140
Autor:
L. Vonka, M. Němec, M. Čihák, J. Flaks, J. Mrazek, Jan Stursa, Pavel Bem, R. Běhal, Ivo Světlík, M. Cutroneo, Pavel Krist, David Chvatil, Petr Malinský, Milan Štefánik, Jan Kučera, Anna Macková, Jan Kameník, D. Poklop, V. Semian, Vaclav Vosecek, Vaclav Zach, V. Olšanský, Vladimír Havránek, J. Tecl
Publikováno v:
The European Physical Journal Plus. 136
The Nuclear Physics Institute (NPI) of the Czech Academy of Sciences (CAS) operates, among other facilities, a Tandetron linear accelerator, TR-24 and U-120M cyclotrons, and an MT25 microtron. A new accelerator mass spectrometry (AMS) instrument, MIL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::677c5e580953b3d11e610f64fc66f5ee
https://doi.org/10.1140/epjp/s13360-021-01430-y
https://doi.org/10.1140/epjp/s13360-021-01430-y
Autor:
Vaclav Zach, David Chvatil, Jan Jakubek, Pavel Krist, Carlos Granja, Mária Martišíková, Marek Sommer, Stepan Polansky, Jan Stursa, Satoshi Kodaira, Ondrej Ploc
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 908:60-71
The resolving power of the Timepix detector for wide-range charged particle detection has been examined and evaluated in defined radiation fields. The goal is to broadly characterize mixed-radiation fields consisting namely of X-rays and charged part
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a94476301d33067ed2d8c8dc101a82e6
https://doi.org/10.1016/j.nima.2018.08.014
https://doi.org/10.1016/j.nima.2018.08.014
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 317:479-486
The nitrogen content in winter wheat from various crops grown organically or conventionally was determined by instrumental photon activation analysis. The method utilizes measurement of the annihilation gamma line at 511 keV from the short-lived phot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94da46f3d8486e295d70f494a7fa713e
https://doi.org/10.1007/s10967-018-5881-6
https://doi.org/10.1007/s10967-018-5881-6
Publikováno v:
Minerals
Volume 11
Issue 6
Minerals, Vol 11, Iss 617, p 617 (2021)
Volume 11
Issue 6
Minerals, Vol 11, Iss 617, p 617 (2021)
This paper introduces instrumental photon activation analysis (IPAA) utilizing short-lived products of photonuclear reactions, mainly (γ, n) and (γ, p), initiated by bremsstrahlung from the MT-25 microtron. A rapid nondestructive IPAA method for ge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e56055e57b4906ba603ba1ab37f15c7d
https://doi.org/10.3390/min11060617
https://doi.org/10.3390/min11060617
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 4, Iss 0, Pp 56-61 (2016)
This article presents the processing of radiographic data acquired using the position-sensitive hybrid semiconductor pixel detector Timepix. Measurements were made on thin samples at the medical ion-synchrotron HIT [1] in Heidelberg (Germany) with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::040b3720345589389d0813dfbad8a50c
https://ojs.cvut.cz/ojs/index.php/APP/article/view/3727
https://ojs.cvut.cz/ojs/index.php/APP/article/view/3727