scholarly journals Determination of degradation constant of Li ion from 10B(n,α γ)7Li reaction in various media

2011 ◽  
Vol 1 (1) ◽  
pp. 317-322
Author(s):  
G. M. Sun ◽  
Y. Lee ◽  
J. H. Moon ◽  
R. Acharya
Keyword(s):  
Line Shape ◽  
Gamma Ray ◽  
Numerical Study ◽  
Prompt Gamma Activation Analysis ◽  
Boron Steel ◽  
Gamma Line ◽  
Prompt Gamma ◽  
Slowing Down ◽  
Parametric Search ◽  
Li Ion

Abstract A Li ion from a 10B(n,α γ) 7Li reaction induced by a thermal neutron undergoes a large degradation due to its high stopping power in a medium. This phenomenon influences the peak line shape of the 477.6 keV gamma line emitted from an excited 7Li nucleus recoiled by an energetic alpha particle and the peak line shape in a spectrum varies according to the slowing-down media. A numerical study for the analysis of the line shape has been conducted by performing a parametric search and fitting the measured spectrum in a least squares approach by Choi et al. and implemented in a recent version of HYPERGAM code. In this study, the gamma-ray spectra were measured for various media like elemental boron, boric acid, borax, boron carbide, boron steel and so on at a SNU-KAERI prompt gamma activation analysis facility of the HANARO research reactor in Korea Atomic Energy Research Institute. The degradation constant was determined for various slowing-down media.

scholarly journals Correction for neutron self-shielding and gamma-ray self-absorption in prompt-gamma activation analysis for large and irregularly shaped samples

2021 ◽  
Author(s):  
László Szentmiklósi ◽  
Zoltán Kis ◽  
Boglárka Maróti ◽  
László Zoltán Horváth
Keyword(s):  
Activation Analysis ◽  
Matrix Effect ◽  
Gamma Ray ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
Sample Geometry ◽  
Prompt Gamma Activation

Prompt-gamma activation analysis (PGAA) has been extended and validated to measure large and irregularly shaped samples. The detailed sample geometry was implemented in the MCNP-model of the setup and accurate matrix-effect corrections were obtained.

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

Obsidian in the Early Neolithic of the Upper Vistula basin: origin, processing, distribution and use – a case study from Tominy (southern Poland)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Marcin Szeliga ◽  
Zsolt Kasztovszky ◽  
Grzegorz Osipowicz ◽  
Veronika Szilágyi
Keyword(s):  
River Basin ◽  
Prompt Gamma Activation Analysis ◽  
Raw Material ◽  
Published Data ◽  
Prompt Gamma ◽  
Early Neolithic ◽  
Musical Note ◽  
Southern Poland ◽  
The Carpathians ◽  
Vistula River

Abstract The inflow of the Carpathian obsidian into the areas on the northern side of the Carpathians and the Sudetes is confirmed as early as in the Palaeolithic. However, its greatest intensity occurred in the Early Neolithic, i. e. in the late 6th and in the first half of 5th millennia BC. During that period, the phenomenon was closely related with the development of the Danubian cultural groups in the upper Vistula river basin, including especially Linear Pottery culture (LBK) and Malice Culture. The constant presence of this raw material products in mentioned areas is documented from the classical (musical-note) phase of LBK, constituting one of the most expressive pieces of evidence of permanent and intense intercultural contacts with communities of the northern Carpathian Basin. This phenomenon has been repeatedly emphasized in the literature. One of the most numerous LBK obsidian inventories in the upper Vistula river basin was obtained at site 6 in Tominy, located in southern Poland, in the non-loess zone of the Sandomierz Upland northern foreground. The above-mentioned collection, its non-destructive elemental analysis, using Prompt Gamma Activation Analysis (PGAA) and also traceological analysis, is the subject of this article. The results supplement the published data to a significant extent, simultaneously providing partial verification and updating of the current state of knowledge on the basic issues related to the Early Neolithic obsidian inflow into areas located North of the Carpathians, including primarily the origin of the raw material, the scale of its processing and distribution ways, as well as the range of its use by the LBK communities.

scholarly journals Localization of inclusions in multiple prompt gamma ray analysis: a feasibility study

2013 ◽  
Vol 470 ◽  
pp. 012001 ◽  
Author(s):  
A Miceli ◽  
G Festa ◽  
R Senesi ◽  
G Gorini ◽  
C Andreani
Keyword(s):  
Feasibility Study ◽  
Gamma Ray ◽  
Prompt Gamma

PO-1728: Development of a new prompt gamma ray detection system for full 3D proton range verification

2020 ◽  
Vol 152 ◽  
pp. S957-S958
Author(s):  
P. Costanza ◽  
R.I. Mackay ◽  
K.J. Kirkby ◽  
M.J. Taylor
Keyword(s):  
Gamma Ray ◽  
Detection System ◽  
Prompt Gamma ◽  
Range Verification

scholarly journals Optical Afterglows as Probes for the Central Engine and Fireball of Gamma-Ray Bursts

2012 ◽  
Vol 8 (S290) ◽  
pp. 263-264
Author(s):  
Liang Li ◽  
En-Wei Liang ◽  
He Gao ◽  
Bing Zhang
Keyword(s):  
Statistical Analysis ◽  
Gamma Rays ◽  
Density Profile ◽  
Gamma Ray ◽  
Ambient Medium ◽  
Gamma Ray Bursts ◽  
Prompt Gamma ◽  
Medium Density ◽  
Central Engine ◽  
Prompt Emission

AbstractWell-sampled optical lightcurves of 146 gamma-ray bursts (GRBs) are compiled from literature. We identify possible emission components based on our empirical fits and present statistical analysis for these components. We find that the flares are related to prompt emission, suggesting that they could have the same origin in different episodes. The shallow decay segment is not correlated with prompt gamma-rays. It likely signals a long-lasting injected wind from GRB central engines. Early after onset peak is closely related with prompt emission. The ambient medium density profile is likely n ∝ r−1. No correlation between the late re-brightening bump and prompt gamma-rays or the onset bump is found. They may be from another jet component.

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