scholarly journals Preliminary study of kaonic deuterium X-rays by the SIDDHARTA experiment at DAΦNE

2013 ◽  
Vol 907 ◽  
pp. 69-77 ◽  
Author(s):  
M. Bazzi ◽  
G. Beer ◽  
C. Berucci ◽  
L. Bombelli ◽  
A.M. Bragadireanu ◽  
...  
Keyword(s):  
X Rays ◽  
Kaonic Deuterium ◽  
Preliminary Study

Preliminary Study on the Anti-radiation Effect of Jen-Sheng-Yang-Yung-Tang

1993 ◽  
Vol 21 (02) ◽  
pp. 187-195 ◽  
Author(s):  
Hsue-yin Hsu ◽  
Yau-hui Ho ◽  
Shi-Iong Lian ◽  
Chun-ching Lin
Keyword(s):  
Bone Marrow ◽  
Radiation Effect ◽  
Bone Marrow Cells ◽  
X Rays ◽  
Male Mice ◽  
X Ray ◽  
Colony Forming Units ◽  
Before And After ◽  
Preliminary Study ◽  
Different Doses

Six to seven week old male mice of ICR strain were exposed to different doses of x-rays to determine if Jen-Sheng-Yang-Yung-Tang could be a modifier in the elimination of radiation damage. Colony forming units of bone marrow cells in the spleen (CFUs) were measured before and after x-ray irradiation with intraperitoneal injection of 10 mg/20 g or 20 mg/20 g body weight of Jen-Sheng-Yang-Yung-Tang, once a day for seven consecutive days. The recovery of CFUs and hemocytes counts by 4 Gy irradiation with Jen-Sheng-Yang-Yung-Tang administration was faster for a concentration of 20 mg/20 g than 10 mg/20 g. The measurement of 10-day CFUs showed an increase of radiotolerance in the treatment of 20 mg/20 g administration before x-ray irradiation. The injection of Jen-Sheng-Yang-Yung-Tang accelerated the recovery of hemocyte counts in mice irradiated with 4 Gy x-ray; the effect was especially profound for leukocytes with 20 mg/20 g Jen-Sheng-Yang-Yung-Tang administration after irradiation.

scholarly journals Use of computerized tomography and chest X‐rays in evaluating efficacy of aerosolized recombinant human DNase in cystic fibrosis patients younger than age 5 years: A preliminary study

2001 ◽  
Vol 31 (5) ◽  
pp. 377-382 ◽  
Author(s):  
Samya Z. Nasr ◽  
Lawrence R. Kuhns ◽  
Randall W. Brown ◽  
Martin E. Hurwitz ◽  
Georgiana M. Sanders ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Computerized Tomography ◽  
X Rays ◽  
Preliminary Study

Kaonic hydrogen X-rays — experiments at DAFNE

2007 ◽  
Vol 85 (5) ◽  
pp. 479-485 ◽  
Author(s):  
M Cargnelli ◽  
T Ishiwatari ◽  
P Kienle ◽  
J Marton ◽  
E Widmann ◽  
...  
Keyword(s):  
Chiral Symmetry Breaking ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
X Rays ◽  
Large Area ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Research Experiment ◽  
Scattering Lengths ◽  
Excellent Energy Resolution

At the DAΦNE electron–positron collider of Laboratori Nazionali di Frascati we study kaonic atoms, taking advantage of the low-energy kaons produced in the Φ-meson decay. The low-energy kaon–nucleon interaction in kaonic hydrogen and kaonic deuterium can be investigated under favorable conditions. The DEAR (DAΦNE Exotic Atom Research) experiment at LNF delivered the most precise data on kaonic hydrogen up to now. DEAR and its follow-up experiment SIDDHARTA (Silicon Drift Detector for Hadronic Atom Research by Timing Application) are using X-ray spectroscopy of kaonic hydrogen and kaonic deuterium atoms to measure the strong interaction-induced shift and width of the ground state. From these quantities the isospin-dependent antikaon–nucleon scattering lengths can be determined, quantities useful for testing the understanding of chiral symmetry breaking in the strangeness sector. Within the SIDDHARTA project new X-ray detectors are being developed. We will use an array of large area silicon drift detectors (SDDs) having excellent energy resolution but also providing a timing capability that will result in a huge suppression of background and so overcome the precision limits of the former experiments.PACS Nos.: 36.10.k, 13.75.Jz, 32.30.Rj and 29.40.Wk

KAONIC HELIUM MEASUREMENTS IN THE SIDDHARTA EXPERIMENT

2011 ◽  
Vol 26 (03n04) ◽  
pp. 601-603
Author(s):  
◽  
D. L. SIRGHI ◽  
M. BAZZI ◽  
G. BEER ◽  
L. BOMBELLI ◽  
...  
Keyword(s):  
Energy Shift ◽  
High Energy ◽  
Low Energy ◽  
Kaonic Hydrogen ◽  
X Rays ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Theoretical Predictions ◽  
First Time ◽  
Hadronic Atom

The SIDDHARTA experiment (SIlicon Drift Detector for Hadronic Atom Research by Timing Application) had the aim to perform kaonic atoms X-ray transitions measurements, to better understand aspects of the low-energy QCD in the strangeness sector. The experiment combined the excellent low-energy kaon beam generated at DAΦNE, allowing to use gaseous targets, with excellent fast X-rays detectors: Silicon Drift Detectors. SIDDHARTA was installed on DAΦNE in autumn 2008 and took data till late 2009. Apart of the kaonic hydrogen and kaonic deuterium measurements, we have performed the kaonic helium transitions to the 2p level ( L -lines) measurements: for the first time in a gaseous target for helium4 and for the first time ever for kaonic helium3. The interest for such type of measurement was rather high, being it triggered by two reasons: the so-called "kaonic helium puzzle" (even if this was solved by KEK-PS E570 experiment, but a cross-check was useful) and some theoretical predictions of possible high energy shift (at the level of 10 eV). In this paper the preliminary results for the measurements to the 2p level ( L -series) for kaonic helium4 and kaonic helium3 are presented.

Preliminary study for producing higher harmonic hard x-rays from weakly ionized copper plasma

2005 ◽  
Author(s):  
Eiichi Sato ◽  
Yasuomi Hayasi ◽  
Rudolf Germer ◽  
Haruo Obara ◽  
Etsuro Tanaka ◽  
...  
Keyword(s):  
X Rays ◽  
Weakly Ionized ◽  
Preliminary Study ◽  
Higher Harmonic ◽  
Copper Plasma

scholarly journals Stature estimation based on vertebral morphometry by dual energy X-rays absorptiometry imaging in Italian females

2017 ◽  
Vol 90 (1) ◽  
Author(s):  
Chantal Milani ◽  
Marco Di Stefano ◽  
Giancarlo Isaia ◽  
Gian Luigi Panattoni
Keyword(s):  
Dual Energy ◽  
Long Bones ◽  
Italian Population ◽  
X Rays ◽  
Vertebral Morphometry ◽  
Mathematical Methods ◽  
Stature Estimation ◽  
X Ray ◽  
Vertebral Bodies ◽  
Preliminary Study

Anthropological profile in forensic context includes the assessment of parameters as ancestry, sex, age and stature of an individual by the analysis of skeletal remains. Stature can be estimated from decomposed and fully or partially skeletonized remains by means of anatomical or mathematical methods applied on the whole skeleton or single bones. Many authors calculated regression formulae for the living stature estimation by these methods, in particular based on a population similar to the remains recovered. Long bones are commonly used for stature estimation, but, when they are missing, methods involving different parts of the skeleton are needed. In this preliminary study we measured heights of the vertebral bodies in a female Caucasian Italian population, evaluated by images of morphometric X-ray absorptiometry based on dual-energy X-ray absorptiometry in living subjects investigated for routine diagnostic purposes. Thoracic and lumbar segments of the spine were measured and statistical analysis was performed, thus obtaining regression formulae for estimated living stature from thoraco-lumbar spine segments (T<sub>6</sub>-T<sub>12</sub>, L<sub>1</sub>-L<sub>4</sub> and T<sub>6</sub>-L<sub>4</sub>). We propose this method for stature evaluation in physical or forensic anthropology when the spine is available and long bones are missing.

Preliminary Study Of the Behavior Of HPGe Detectors With Ion Implanted Contacts in the Ultralow-Energy X-Ray Region

1981 ◽  
Vol 25 ◽  
pp. 23-30 ◽  
Author(s):  
M. Slapa ◽  
J. Chwaszczewska ◽  
J. Jurkowski ◽  
A. Latussynski ◽  
G.C. Huth ◽  
...  
Keyword(s):  
Hpge Detector ◽  
Low Energy ◽  
Entrance Window ◽  
X Rays ◽  
X Ray ◽  
Ultralow Energy ◽  
Hpge Detectors ◽  
Preliminary Study ◽  
First Time ◽  
Ion Implanted

AbstractPreliminary study of performance of an HPGe detector with an ion implanted entrance window in the spectrometry of the ultralowenergy x-rays is presented.For the first time it has been shown that almost symmetric photopeaks and absence of low energy tailing can be obtained in this region from HPGe detectors.

scholarly journals Some eects of the doping with alpha - Al_2O_3 nanoparticles in the transport properties of Bi_1.65 Pb_0.35 Sr_2Ca_2 Cu_3O_y ceramic superconductors

2018 ◽  
Vol 64 (2) ◽  
pp. 127 ◽  
Author(s):  
Manuel Alfredo Hernández Wolpez
Keyword(s):  
Heat Treatment ◽  
Electrical Resistivity ◽  
Critical Temperature ◽  
Transport Properties ◽  
Solid State Reaction Method ◽  
X Rays ◽  
Reaction Method ◽  
Ceramic Superconductors ◽  
Ceramic Samples ◽  
Preliminary Study

We present a preliminary study on the eects of alpha - Al_2O_3 nanoparticles (NPs) in the transport properties of Bi_1.65 Pb_0.35 Sr_2Ca_2 Cu_3O_y ((Bi,Pb)-2223) ceramic samples. The (Bi,Pb)-2223 samples were synthesized by the solid state reaction method and alpha - Al_2O_3 NPs, with concentrations ranging from 0.1 to 0.8 wt. percent (% wt.), were added before the last heat treatment. All samples were characterized by means of X-rays diraction patterns, and temperature and magnetic eld dependence of the electrical resistivity, rho(T;Ba). From the experimental (T;Ba) data we extracted the critical temperature dependence of the % wt. of alpha - Al_2O_3 NPs, and by using the Arrheniusplot the eective pinning energy has been also determined. The results indicate that mostly of the transport properties are optimized for the sample B03.

Development of L-Line X-Ray Fluorescence Instrumentation and its Applications to In-Vivo Measurement of Lead in Bone

1994 ◽  
Vol 38 ◽  
pp. 573-577
Author(s):  
John E. Rosen
Keyword(s):  
Detection Limit ◽  
Count Rate ◽  
X Rays ◽  
Post Mortem ◽  
X Ray ◽  
In Vivo Measurement ◽  
Preliminary Study ◽  
Improved Design ◽  
Polarized Radiation

Initially, Wielopolski (Wielopolski et al. 1981) used x-rays from either a 125I or a 105Cd source to estimate lead (Pb) in tibial cortical bone in intact legs, post-mortem. This system utilized the Lα and Lβ x-rays of Pb with energies of 10.5 and 12.6 keV, respectively. The minimum detection limit (MDL) was considered to be comparable with existing K-line x-ray fluorescence (KXRF) instruments, namely, 20-30 ppm. The feasibility of partially polarized radiation (Barkla, 1906) was assessed from a 125I source on Pb (No3)2 (10,000 ppm) dissolved in wa:er. Reduction of the detector total count rate was observed by a factor of two; and reduction in background by the same factor was appaent. This preliminary study suggested that, with improved design, tlie MDL might be lowered by a factor of five (Wielopolski et al., 1981).

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