Atmospheric aerosol analysis at the PIXE–RBS beamline in the University of Jordan Van de Graaff accelerator (JUVAC)

2019 ◽  
Vol 48 (3) ◽  
pp. 188-194
Author(s):  
Hanan Sa'adeh ◽  
Massimo Chiari
Keyword(s):  
Atmospheric Aerosol ◽  
Graaff Accelerator ◽  
Aerosol Analysis ◽  
University Of Jordan ◽  
Van De Graaff ◽  
The University

scholarly journals Radiometric Dating with the University of Washington Tandem Van De Graaff Accelerator

Radiocarbon ◽  
1980 ◽  
Vol 22 (3) ◽  
pp. 838-849 ◽  
Author(s):  
G W Farwell ◽  
T P Schaad ◽  
F H Schmidt ◽  
M-Y B Tsang ◽  
P M Grootes ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Radiometric Dating ◽  
Isotopic Ratios ◽  
Isotopic Abundance ◽  
University Of Washington ◽  
Joint Project ◽  
Graaff Accelerator ◽  
Technical Developments ◽  
Van De Graaff ◽  
The University

The University of Washington Model FN tandem Van de Graaff accelerator is being used for the measurement of extremely small isotopic abundance ratios, notably 14C/12C and 10Be/9Be, in a joint project of the Nuclear Physics Laboratory (NPL) and the Quaternary Isotope Laboratory (QL). The experimental arrangements and technical developments are described, and some preliminary results on isotopic ratios in carbon and beryllium are presented.

The lamb shift polarized ion source at the FN tandem Van de Graaff accelerator of the university of cologne

1978 ◽  
Vol 150 (3) ◽  
pp. 407-416 ◽  
Author(s):  
V. Bechtold ◽  
L. Friedrich ◽  
P. Ziegler ◽  
R. Aniol ◽  
G. Latzel ◽  
...  
Keyword(s):  
Lamb Shift ◽  
Ion Source ◽  
Graaff Accelerator ◽  
Van De Graaff ◽  
The University

scholarly journals Radiocarbon Dating with Tandem Electrostatic Accelerators

Radiocarbon ◽  
1980 ◽  
Vol 22 (3) ◽  
pp. 785-793 ◽  
Author(s):  
H E Gove ◽  
David Elmore ◽  
R D Ferraro ◽  
R P Beukens ◽  
K H Chang ◽  
...  
Keyword(s):  
Radiocarbon Dating ◽  
Sample Sizes ◽  
Graaff Accelerator ◽  
Carbon Sample ◽  
Van De Graaff ◽  
The University ◽  
Woolly Mammoth

An MP tandem Van de Graaff accelerator at the University of Rochester has been employed since May 1977 to detect 14C in various terrestrial samples. The carbon sample sizes required are 1mg or less. Dating accuracies based on reproducibility now approach (± 80 years). Measurements have been made on 1850 wood, Australian sucrose, a carbon sample from Mt Shasta, a baby woolly mammoth, and an Egyptian bull mummy wrapping.

Specimen Preparation of Near Surface Ion Irradiated Samples

1985 ◽  
Vol 43 ◽  
pp. 170-171
Author(s):  
K. F. Russell ◽  
L. L. Horton
Keyword(s):  
Radiation Damage ◽  
Heavy Ions ◽  
Target Material ◽  
Metal Alloys ◽  
Specimen Surface ◽  
Specimen Preparation ◽  
Particle Accelerators ◽  
Near Surface ◽  
Graaff Accelerator ◽  
Van De Graaff

Beams of heavy ions from particle accelerators are used to produce radiation damage in metal alloys. The damaged layer extends several microns below the surface of the specimen with the maximum damage and depth dependent upon the energy of the ions, type of ions, and target material. Using 4 MeV heavy ions from a Van de Graaff accelerator causes peak damage approximately 1 μm below the specimen surface. To study this area, it is necessary to remove a thickness of approximately 1 μm of damaged metal from the surface (referred to as “sectioning“) and to electropolish this region to electron transparency from the unirradiated surface (referred to as “backthinning“). We have developed electropolishing techniques to obtain electron transparent regions at any depth below the surface of a standard TEM disk. These techniques may be applied wherever TEM information is needed at a specific subsurface position.

A cross sectional study: The association between sleeping quality and stress among second and third medical students at the University of Jordan

2021 ◽  
pp. 009121742110112
Author(s):  
AA Toubasi ◽  
BR Khraisat ◽  
RB AbuAnzeh ◽  
HM Kalbouneh
Keyword(s):  
Logistic Regression ◽  
Medical Students ◽  
Cross Sectional Study ◽  
Regular Exercise ◽  
Sectional Study ◽  
Chi Square ◽  
Cross Sectional ◽  
The Mean ◽  
University Of Jordan ◽  
The University

Objective Medicine is considered one if not the most stressful educational field. Thus, the aim of this study is to investigate the prevalence of stress and poor sleeping quality among medical students and the association between them. Method This cross-sectional study was conducted at the University of Jordan on second- and third-year medical students. The questionnaire consisted of: 1) Demographics; 2) The assessment tools which were Pittsburgh Quality of Sleep Index (PSQI) and Kessler Psychological Distress Status (K10). Binary logistic regression, chi-square and linear regression were used to investigate the association between PSQI, K10, and their determinants. Results The mean for PSQI score was 6.76 ± 3.32. PSQI scores interpretation revealed that 61.7% of the 282 participants of this study were poor sleepers. Logistic regression results showed that only the category of not napping at all from the napping hours variable was significantly associated with sleeping quality. Furthermore, the mean of K10 scores was 24.5 ± 8.5. K10 scores revealed that 66.3% of the participants were stressed. Logistic regression results showed that gender and regular exercise were significantly associated with psychological distress. Additionally, chi-square test, logistic regression and linear regression showed that PSQI was significantly associated with K10 (P <0.01). Conclusions Stress and poor sleeping quality in medical students at the University of Jordan were highly prevalent and strongly associated. What determined PSQI was daytime napping, and for K10 were regular exercise and gender. Further investigations into stress and sleep quality in the Arabian region are needed.

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