Determination of capture cross section and surface-states concentration profile using the surface-acoustic-wave convolver

1980 ◽  
Vol 27 (2) ◽  
pp. 461-466 ◽  
Author(s):  
H. Gilboa ◽  
P.K. Das
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Cross Section ◽  
Concentration Profile ◽  
Capture Cross Section ◽  
Surface States ◽  
Capture Cross

Determination of the radiative capture cross section of236U for neutrons of energies 0.96 MeV and 3.30 MeV

1986 ◽  
Vol 61 (5) ◽  
pp. 956-957 ◽  
Author(s):  
A. N. Gudkov ◽  
A. N. Davletshin ◽  
V. M. Zhivun ◽  
V. V. Kovalenko ◽  
A. B. Koldobskii ◽  
...  
Keyword(s):  
Cross Section ◽  
Capture Cross Section ◽  
Radiative Capture ◽  
Capture Cross ◽  
Radiative Capture Cross Section

Identification of Nuclear Levels of [sup 34]S for Determination of the Neutron Capture Cross Section

2009 ◽  
Author(s):  
Tadahiro Kin ◽  
Masumi Oshima ◽  
Kazuyoshi Furutaka ◽  
Mitsuo Koizumi ◽  
Yosuke Toh ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Capture Cross ◽  
Neutron Capture Cross Section ◽  
Nuclear Levels

Effect of Sacrificial AlN (Aluminum Nitride) Layer on the Deep Surface States of 4H-SiC

2021 ◽  
Vol 21 (3) ◽  
pp. 1904-1908
Author(s):  
Woo-Young Son ◽  
Jeong Hyun Moon ◽  
Wook Bahng ◽  
Sang-Mo Koo
Keyword(s):  
Cross Section ◽  
Deep Level Transient Spectroscopy ◽  
Capture Cross Section ◽  
Deep Level ◽  
Surface States ◽  
Nitride Layer ◽  
Double Negative ◽  
Capture Cross ◽  
Trap Energy ◽  
Transient Spectroscopy

We investigated the effect of a sacrificial AlN layer on the deep energy level states of 4H-SiC surface. The samples with and without AlN layer have been annealed at 1300 °C for 30 minutes duration using a tube furnace. After annealing the samples, the changes of the carbon vacancy (VC) related Z1/2 defect characteristics were analyzed by deep level transient spectroscopy. The trap energy associated with double negative acceptor (VC(2-/0)) appears at ˜0.7 eV and was reduced from ˜0.687 to ˜0.582 eV in the sacrificial AlN layer samples. In addition, the capture cross section was significantly improved from ˜2.1×10-14 to ˜3.8×10−16 cm−2 and the trap concentration was reduced by approximately 40 times.

THE PURIFICATION, DETERMINATION, AND NEUTRON CAPTURE CROSS SECTION OF ACTINIUM-227

1959 ◽  
Vol 37 (6) ◽  
pp. 1094-1103 ◽  
Author(s):  
M. J. Cabell
Keyword(s):  
Thermal Neutron ◽  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Exchange Chromatography ◽  
Thermal Neutron Capture ◽  
Resonance Capture ◽  
Capture Cross ◽  
Neutron Capture Cross Section

Procedures are described for (a) the separation by ion exchange chromatography of submicrogram quantities of Ac227 from its daughters and (b) the absolute determination of Ac227 by measurement of the rate of growth of α-particle emission from an initially pure source. These procedures are utilized in the determination of the reactor and thermal neutron capture cross sections and the resonance capture integral of Ac227 by an activation method.Assuming 36.5 barns for the thermal neutron capture cross section of Co59, a value of σ2200 = 814 ± 13 barns has been obtained for Ac227. The resonance capture integral (from 0.5 ev to ∞) was found to be 1177 ± 19 barns relative to 48.6 barns for the resonance capture integral of Co59.

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