scholarly journals Total Cross Sections as a Surrogate for Neutron Capture: An Opportunity to Accurately Constrain (n,γ) Cross Sections for Nuclides Beyond the Reach of Direct Measurements

2014 ◽  
Author(s):  
Paul E. Koehler
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections ◽  
Direct Measurements

Neutron capture and total cross sections ofSm144

1993 ◽  
Vol 48 (3) ◽  
pp. 1120-1127 ◽  
Author(s):  
R. L. Macklin ◽  
N. W. Hill ◽  
J. A. Harvey ◽  
G. L. Tweed
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections

scholarly journals Neutron capture and total cross-section measurements of 155Gd and 157Gd at ANNRI in J-PARC

2020 ◽  
Vol 239 ◽  
pp. 01012
Author(s):  
Atsushi Kimura ◽  
Shoji Nakamura ◽  
Osamu Iwamoto ◽  
Nobuyuki Iwamoto ◽  
Hideo Harada ◽  
...  
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Life Science ◽  
Measurement Instrument ◽  
Proton Accelerator ◽  
Experimental Facility ◽  
Total Cross Sections ◽  
Neutron Time ◽  
Time Of Flight Method ◽  
Glass Detectors

Neutron capture and total cross sections of 155Gd and 157Gd were measured with the neutron time-of-flight method in Accurate Neutron-Nucleus Reaction measurement Instrument at Material and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex using the NaI (Tl) spectrometer and Li-glass detectors. Preliminary cross sections were obtained in the neutron energy region from 4 meV to 100 meV. The derived cross sections agree with evaluated values in JENDL 4.0 and the experimental results by Mastromarco but were not consistent with those by Leinweber.

Measurements of the 243Am neutron capture and total cross sections with ANNRI at J-PARC

2019 ◽  
Vol 56 (6) ◽  
pp. 479-492 ◽  
Author(s):  
Atsushi Kimura ◽  
Shoji Nakamura ◽  
Kazushi Terada ◽  
Taro Nakao ◽  
Kazuhito Mizuyama ◽  
...  
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections

Neutron capture and total cross sections for 48Ca: Astrophysical implications

1985 ◽  
Author(s):  
R. F. Carlton ◽  
J. A. Harvey ◽  
N. W. Hill ◽  
R. L. Macklin
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections

Neutron Capture, Fission, and Total Cross Sections of Plutonium-240 from 20 eV to 30 keV

1972 ◽  
Vol 49 (2) ◽  
pp. 153-161 ◽  
Author(s):  
R. W. Hockenbury ◽  
W. R. Moyer ◽  
R. C. Block
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections

Neutron capture and total cross sections ofI127andI129

2006 ◽  
Vol 74 (5) ◽  
Author(s):  
G. Noguere ◽  
O. Bouland ◽  
A. Brusegan ◽  
P. Schillebeeckx ◽  
P. Siegler ◽  
...  
Keyword(s):  
Cross Sections ◽  
Neutron Capture ◽  
Total Cross Sections

scholarly journals Study of the neutron and proton capture reactions 10,11B(n, γ), 11B(p, γ), 14C(p, γ), and 15N(p, γ) at thermal and astrophysical energies

2014 ◽  
Vol 23 (08) ◽  
pp. 1430012 ◽  
Author(s):  
Sergey Dubovichenko ◽  
Albert Dzhazairov-Kakhramanov
Keyword(s):  
Experimental Data ◽  
Cross Sections ◽  
Neutron Capture ◽  
Proton Capture ◽  
Total Cross Sections ◽  
Resonance Behavior ◽  
S Factor ◽  
Scattering Phase ◽  
R Process

We have studied the neutron-capture reactions 10,11 B (n, γ) and the role of the 11 B (n, γ) reaction in seeding r-process nucleosynthesis. The possibility of the description of the available experimental data for cross-sections of the neutron capture reaction on 10 B at thermal and astrophysical energies, taking into account the resonance at 475 keV, was considered within the framework of the modified potential cluster model (MPCM) with forbidden states (FS) and accounting for the resonance behavior of the scattering phase shifts. In the framework of the same model, the possibility of describing the available experimental data for the total cross-sections of the neutron radiative capture on 11 B at thermal and astrophysical energies were considered with taking into account the 21 and 430 keV resonances. Description of the available experimental data on the total cross-sections and astrophysical S-factor of the radiative proton capture on 11 B to the GS of 12 C was treated at astrophysical energies. The possibility of description of the experimental data for the astrophysical S-factor of the radiative proton capture on 14 C to the GS of 15 N at astrophysical energies, and the radiative proton capture on 15 N at the energies from 50 to 1500 keV was considered in the framework of the MPCM with the classification of the orbital states according to Young tableaux. It was shown that, on the basis of the M1 and the E1 transitions from different states of the p15 N scattering to the GS of 16 O in the p15 N channel, it is quite succeed to explain general behavior of the S-factor in the considered energy range in the presence of two resonances.

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

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