An Analysis of Total Gamma‐Ray Cross Sections in Al, Cu, and Pb

1968 ◽  
Vol 39 (3) ◽  
pp. 1407-1410 ◽  
Author(s):  
K. Parthasaradhi
Keyword(s):  
Cross Sections ◽  
Gamma Ray

Development of SiO2 based doped with LiF, Cr2O3, CoO4 and B2O3 glasses for gamma and fast neutron shielding

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bünyamin Aygün ◽  
Erdem Şakar ◽  
Abdulhalik Karabulut ◽  
Bünyamin Alım ◽  
Mohammed I. Sayyed ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Fast Neutron ◽  
Cross Sections ◽  
Gamma Ray ◽  
Absorbed Dose ◽  
Neutron Shielding ◽  
Shielding Properties ◽  
Effective Neutron ◽  
Simulation Codes

AbstractIn this study, the fast neutron and gamma-ray absorption capacities of the new glasses have been investigated, which are obtained by doping CoO,CdWO4,Bi2O3, Cr2O3, ZnO, LiF,B2O3 and PbO compounds to SiO2 based glasses. GEANT4 and FLUKA Monte Carlo simulation codes have been used in the planning of the samples. The glasses were produced using a well-known melt-quenching technique. The effective neutron removal cross-sections, mean free paths, half-value layer, and transmission numbers of the fabricated glasses have been calculated through both GEANT4 and FLUKA Monte Carlo simulation codes. Experimental neutron absorbed dose measurements have been carried out. It was found that GS4 glass has the best neutron protection capacity among the produced glasses. In addition to neutron shielding properties, the gamma-ray attenuation capacities, were calculated using newly developed Phy-X/PSD software. The gamma-ray shielding properties of GS1 and GS2 are found to be equivalent to Pb-based glass.

Radiochemical study on the mechanism of target fragmentation of Cu, Nb, Pr and Au targets induced by 12C and 40Ar projectiles

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
Akihiko Yokoyama ◽  
S. Morimoto ◽  
H. Araki ◽  
J. Sanada ◽  
H. Baba ◽  
...  
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Thick Target ◽  
Fragmentation Process ◽  
Gamma Ray Spectrometry ◽  
Target Fragmentation ◽  
Radiochemical Study

A thick-target thick-catcher experiment was performed to measure the formation cross sections and recoil momenta of products from target fragmentation of Cu, Nb, Pr, and Au by using gamma-ray spectrometry. Bombardments of C ions (180, 290, and 400 MeV/u) and Ar ions (290 and 650 MeV/u) were performed at the HIMAC facility in Japan. The results were discussed in comparison with systematics of fragmentation and used to deduce the prefragments in fragmentation process of the measured systems.

Progress in the Measurement of Gamma-Ray Production Cross Sections Induced by 14.9 MeV Neutrons

1992 ◽  
pp. 332-334
Author(s):  
Fan Guoying ◽  
Zhou Hongyu ◽  
Zhu Xiaoge ◽  
Hua Ming ◽  
Wen Shenlin ◽  
...  
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Production Cross

Nonequilibrium effects in α-particle-induced reactions in Cs and I

2000 ◽  
Vol 78 (2) ◽  
pp. 133-139 ◽  
Author(s):  
M K Bhardwaj ◽  
I A Rizvi ◽  
A K Chaubey
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Theoretical Calculations ◽  
High Energy ◽  
Particle Energy ◽  
Substantial Contribution ◽  
Equilibrium Geometry ◽  
Activation Technique ◽  
Excitation Functions ◽  
Stacked Foil Activation Technique

The excitation functions for the reactions 127I(α,n)130Cs, 127I(α,2n)129Cs, 127I(α,4n)127Cs, 133Cs(α,2n)135La, and 133Cs(α,4n)133La have been measured up to 50 MeV alpha-particle energy using the stacked-foil activation technique and Ge(Li) gamma-ray spectroscopy. The measured cross sections were compared with theoretical calculations considering equilibrium as well as the pre-equilibrium geometry-dependent hybrid models of Blann. The high-energy tails of the excitation functions show a substantial contribution from pre-equilibrium emission. A general agreement is observed between the experimental results and theoretical predictions with an initial exciton configuration n0 = 4(2n + 2p + 0h).PACS No. 25.40-h

APPLICATIONS OF THERMAL MULTIGATE DECAY PULSED NEUTRON LOGS IN UNUSUAL DOWNHOLE LOGGING ENVIRONMENTS

1985 ◽  
Vol 25 (1) ◽  
pp. 265
Author(s):  
Sami O. Ajam ◽  
V.E. Rahal
Keyword(s):  
Gamma Rays ◽  
Cross Sections ◽  
Gamma Ray ◽  
Decay Curve ◽  
Drill Pipe ◽  
Paper Briefly ◽  
Gamma Ray Detectors ◽  
Porosity Ratio ◽  
Pulsed Neutron ◽  
Capture Cross Sections

The Thermal Multigate Decay (TMD) logging system utilizes a pulsed 14 Mev generator and two gamma ray detectors to obtain measurements of the capture cross sections of downhole formations. The composite decay curve from both formation and borehole capture gamma rays is detected, and is separated into the two individual components : sigma formation and sigma borehole. The resulting sigma formation measurement is only minimally affected by borehole conditions, especially in cased wells.In addition to sigma formation and sigma borehole, the TMD system generates a dual-spaced porosity ratio and several other parameters which provide information on log quality, borehole parameters, and tool stability. These features can be used to assist the log analyst in understanding the down- hole borehole environment as well as formation characteristics. Under appropriate conditions, the TMD log can also provide production logging information relating to fluid movement in or near the wellbore.The paper briefly reviews the TMD logging system, after which it concentrates on log examples in unusual borehole conditions : logs run across intervals where borehole conditions change; logs run in air filled boreholes; logs run in badly washed out boreholes; logs run through stuck drill pipe/ collars; logs run in flowing wells. The supplemental TMD curves in these situations identify the presence of gravel packs and packers, changes in borehole fluid salinity, possible communication between zones, and water and oil producing perforations. Gas in the borehole can also be clearly differentiated from gas in the formation.

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