Photoneutron Cross Sections for Au Revisited: Measurements with Laser Compton Scattering γ-Rays and Data Reduction by a Least-Squares Method

2011 ◽  
Vol 48 (5) ◽  
pp. 834-840 ◽  
Author(s):  
Osamu ITOH ◽  
Hiroaki UTSUNOMIYA ◽  
Hidetoshi AKIMUNE ◽  
Takeo KONDO ◽  
Masaki KAMATA ◽  
...  
Keyword(s):  
Least Squares ◽  
Compton Scattering ◽  
Cross Sections ◽  
Data Reduction ◽  
Least Squares Method ◽  
Γ Rays ◽  
Laser Compton Scattering

scholarly journals Measurement of deflection on germanium and gold prisms using 1.7 MeV laser Compton scattering γ -rays

2017 ◽  
Vol 381 (36) ◽  
pp. 3129-3133 ◽  
Author(s):  
T. Kawasaki ◽  
S. Naito ◽  
Y. Sano ◽  
T. Hayakawa ◽  
T. Shizuma ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Γ Rays ◽  
Laser Compton Scattering

scholarly journals SPATIALLY-AVERAGED DIFFUSIVITIES FOR POLLUTANT TRANSPORT IN VEGETATED FLOWS

2016 ◽  
Vol 42 ◽  
pp. 1660170
Author(s):  
JUN HUANG ◽  
XIAOFENG ZHANG ◽  
VIVIEN P. CHUA
Keyword(s):  
Experimental Data ◽  
Least Squares ◽  
Cross Sections ◽  
Least Squares Method ◽  
Pollutant Transport ◽  
Longitudinal Direction ◽  
Environmental Benefits ◽  
Reliable Estimate ◽  
Injection Point ◽  
Shoreline Stabilization

Vegetation in wetlands can create complicated flow patterns and may provide many environmental benefits including water purification, flood protection and shoreline stabilization. The interaction between vegetation and flow has significant impacts on the transport of pollutants, nutrients and sediments. In this paper, we investigate pollutant transport in vegetated flows using the Delft3D-FLOW hydrodynamic software. The model simulates the transport of pollutants with the continuous release of a passive tracer at mid-depth and mid-width in the region where the flow is fully developed. The theoretical Gaussian plume profile is fitted to experimental data, and the lateral and vertical diffusivities are computed using the least squares method. In previous tracer studies conducted in the laboratory, the measurements were obtained at a single cross-section as experimental data is typically collected at one location. These diffusivities are then used to represent spatially-averaged values. With the numerical model, sensitivity analysis of lateral and vertical diffusivities along the longitudinal direction was performed at 8 cross-sections. Our results show that the lateral and vertical diffusivities increase with longitudinal distance from the injection point, due to the larger size of the dye cloud further downstream. A new method is proposed to compute diffusivities using a global minimum least squares method, which provides a more reliable estimate than the values obtained using the conventional method.

scholarly journals Measurement of the80Se(γ, n) Cross Section Using Laser-Compton Scattering γ-Rays

2010 ◽  
Vol 47 (4) ◽  
pp. 367-375 ◽  
Author(s):  
Fumito KITATANI ◽  
Hideo HARADA ◽  
Shinji GOKO ◽  
Hiroaki UTSUNOMIYA ◽  
Hidetoshi AKIMUNE ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Cross Section ◽  
Γ Rays ◽  
Laser Compton Scattering

Measurement of (??,n) Cross Sections of Se Isotopes Using Laser-Compton Scattering ??-rays

2011 ◽  
Vol 59 (2(3)) ◽  
pp. 1836-1839 ◽  
Author(s):  
F. Kitatani ◽  
S. Goko ◽  
H. Harada ◽  
H. Utsunomiya ◽  
H. Akimune ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Cross Sections ◽  
Laser Compton Scattering

Half-life ofRe184populated by the (γ,n) reaction from laser Compton scattering γ rays at the electron storage ring NewSUBARU

2006 ◽  
Vol 74 (6) ◽  
Author(s):  
T. Hayakawa ◽  
S. Miyamoto ◽  
Y. Hayashi ◽  
K. Kawase ◽  
K. Horikawa ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Storage Ring ◽  
Half Life ◽  
Electron Storage ◽  
Γ Rays ◽  
Laser Compton Scattering

scholarly journals Resonance Parameters for Uranium 233

1967 ◽  
Vol 20 (6) ◽  
pp. 617 ◽  
Author(s):  
AR de L Musgrove
Keyword(s):  
Least Squares ◽  
Cross Sections ◽  
Least Squares Method ◽  
The Other ◽  
Resonance Parameters ◽  
Single Level ◽  
Channel Theory ◽  
Good Agreement

Single-level and multilevel resonance parameters are given for 233U below 11 e V_ The total and fission cross sections were fitted simultaneously and good agreement was obtained. Spin assignments determined by the least squares method support the prediction of the channel theory of fission that 233U has two level populations; one with predominantly large fission widths and the other with much narrower widths.

scholarly journals Half-life of 184Re populated by photodisintegration reaction with Laser Compton scattering γ-rays at NewSUBARU

2007 ◽  
Author(s):  
T. Hayakawa ◽  
S. Miyamoto ◽  
Y. Hayashi ◽  
K. Kawase ◽  
K. Horikawa ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Half Life ◽  
Γ Rays ◽  
Laser Compton Scattering

scholarly journals Measurements of the152Srn(γ,n) Cross Section with Laser-Compton Scattering γ Rays and the Photon Difference Method

2007 ◽  
Vol 44 (7) ◽  
pp. 938-945 ◽  
Author(s):  
Kaoru Y. HARA ◽  
Hideo HARADA ◽  
Fumito KITATANI ◽  
Shinji GOKO ◽  
Shin-ya HOHARA ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Cross Section ◽  
Difference Method ◽  
Γ Rays ◽  
Laser Compton Scattering

‘Least squares’ method—theorem or law?

1980 ◽  
Vol 59 (9) ◽  
pp. 8
Author(s):  
D.E. Turnbull
Keyword(s):  
Least Squares ◽  
Least Squares Method
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