scholarly journals Delayed Gamma-Ray Spectroscopy for Non-Destructive Assay of Nuclear Materials

2015 ◽  
Author(s):  
Bernhard Ludewigt ◽  
Vladimir Mozin ◽  
Luke Campbell ◽  
Andrea Favalli ◽  
Alan W. Hunt ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
Gamma Ray Spectroscopy ◽  
Non Destructive

scholarly journals Delayed Gamma-Ray Spectroscopy for Non-Destructive Assay of Nuclear Materials

2015 ◽  
Author(s):  
Bernhard Ludewigt ◽  
Vladimir Mozin ◽  
Luke Campbell ◽  
Andrea Favalli ◽  
Alan W. Hunt ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
Gamma Ray Spectroscopy ◽  
Non Destructive

scholarly journals Delayed Gamma-ray Spectroscopy for Non-Destructive Assay of Nuclear Materials

2014 ◽  
Author(s):  
Vladimir Mozin ◽  
◽  
Bernhard Ludewigt ◽  
Luke Campbell ◽  
Andrea Favalli ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
Gamma Ray Spectroscopy ◽  
Non Destructive

scholarly journals Delayed Gamma-Ray Spectroscopy for Non-Destructive Assay of Nuclear Materials

2015 ◽  
Author(s):  
Bernhard Ludewigt ◽  
Vladimir Mozin ◽  
Luke Campbell ◽  
Andrea Favalli ◽  
Alan W. Hunt ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
Gamma Ray Spectroscopy ◽  
Non Destructive

Using borehole gamma-ray spectroscopy to detect tephra layers in lacustrine deposits: An example from Lake Chalco, central Mexico 

2021 ◽  
Author(s):  
Mehrdad Sardar Abadi ◽  
Christian Zeeden ◽  
Arne Ulfers ◽  
Katja Hesse ◽  
Thomas Wonik
Keyword(s):  
Gamma Ray ◽  
Lacustrine Sediments ◽  
Central Mexico ◽  
Stratigraphic Correlation ◽  
Gamma Ray Spectroscopy ◽  
Tephra Layers ◽  
Core Descriptions ◽  
Core Description ◽  
Lake Deposits ◽  
Non Destructive

<p>Lacustrine sediments are archives of past environmental conditions. In recent decades, multinational ICDP efforts have conducted lake drilling projects to encode the potential of paleoclimate signals. Gamma-ray spectroscopy is a particularly useful tool as it is non-destructive, fast, and affordable even in cased boreholes. Gamma radiation can be used to identify elemental isotopes in the geological record, which is used for stratigraphic correlation and paleoclimatic investigations. </p><p>However, some lake sediments contain tephra layers with specific gamma-ray signatures, presenting a challenge for extracting the primary signals caused by environmental and climatic agents. Here, we use the sediments of Lake Chalco in central Mexico to propose a protocol to identify tephra layers embedded in other sediments using high-resolution spectral gamma-ray spectroscopy. This facilitates dividing the overall sediment column into representative horizons of tephra and non-tephra.</p><p>Among the upper 300 m of the lake deposit, our index detected 363 tephra layers, while 388 total tephra layers (≥1 mm in thickness) were reported from the core description of the same borehole, predicting 92% of tephra layers documented in the lake deposits from core descriptions. We suggest that not only the strength of the gamma-ray signal but also the composition of its constituent energy channels can be used to detect embedded tephra layers.</p>

Portable P-I-N CdZnte Gamma-Ray Spectroscopy System

1997 ◽  
Vol 487 ◽  
Author(s):  
R. Sudharsanan ◽  
C. Stenstrom ◽  
G. Vakerlis ◽  
J. Pantazis ◽  
A. Huber ◽  
...  
Keyword(s):  
Thermal Noise ◽  
Gamma Ray ◽  
Nuclear Materials ◽  
Sensitive Volume ◽  
Negative Effects ◽  
Leakage Currents ◽  
Battery Power ◽  
Detector Element ◽  
Gamma Ray Spectroscopy ◽  
Spectroscopy System

AbstractA portable Gamma-Ray Spectroscopy system has been designed and tested for identification of nuclear materials in the field. A P-I-N CdZnTe detector was developed to minimize the leakage current and to improve energy resolution. The detector has a sensitive volume of 200 mm3 and has been constructed with novel heterojunction contacts. Thermoelectric cooling is used to reduce leakage currents in the detector element and the input thermal noise to the FET. Risetime discrimination is used to offset the negative effects of incomplete charge collection. The detector probe is connected to a single unit comprised of detector electronics, an MCA and a portable computer, all operated from battery power. Results from testing with laboratory radioisotopic sources are presented.

Proposal of a Non-Destructive Detection System for Hidden Nuclear Materials Based on a Neutron/Gamma-ray Hybrid System

2011 ◽  
Vol 59 (5(1)) ◽  
pp. 3155-3159 ◽  
Author(s):  
H. Ohgaki ◽  
T. Kii ◽  
K. Masuda ◽  
M. Omer ◽  
T. Misawa ◽  
...  
Keyword(s):  
Hybrid System ◽  
Gamma Ray ◽  
Detection System ◽  
Nuclear Materials ◽  
Non Destructive

Rapid, non-destructive carbon analysis of forest soils using neutron-induced gamma-ray spectroscopy

2010 ◽  
Vol 260 (7) ◽  
pp. 1132-1137 ◽  
Author(s):  
Lucian Wielopolski ◽  
Ruth D. Yanai ◽  
Carrie R. Levine ◽  
Sudeep Mitra ◽  
Matthew A. Vadeboncoeur
Keyword(s):  
Forest Soils ◽  
Gamma Ray ◽  
Gamma Ray Spectroscopy ◽  
Non Destructive ◽  
Carbon Analysis

FLASH X-RAY DEVICES FOR PUMPING NUCLEAR MATERIALS DEVELOPED IN THE GAMMA-RAY LASER PROGRAM AT TEXAS

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-367-C9-370
Author(s):  
C. B. COLLINS ◽  
F. DAVANLOO ◽  
T. S. BOWEN ◽  
J. J. COOGAN
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
X Ray
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