Purity determination of super-enriched176Yb by neutron activation and thermal neutron capture cross section measurement of the high-spin (16+) isomer178m2Hf

1997 ◽  
Vol 215 (2) ◽  
pp. 219-222 ◽  
Author(s):  
J. B. Kim ◽  
D. Trubert ◽  
O. Constantinescu ◽  
S. A. Karamian ◽  
Yu. Ts. Oganessian ◽  
...  
Keyword(s):  
Neutron Activation ◽  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Thermal Neutron Capture ◽  
Capture Cross ◽  
Neutron Capture Cross Section ◽  
Purity Determination ◽  
Section Measurement

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.

scholarly journals A review of nuclear data for the k₀-based neutron activation analysis

2019 ◽  
Vol 9 (1) ◽  
pp. 28-33
Author(s):  
Manh Dung Ho ◽  
Lathdavong Phonesavanh
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Nuclear Data ◽  
Thermal Neutron Capture ◽  
Capture Cross ◽  
Neutron Capture Cross Section

Nuclear data for the k0-based neutron activation analysis (k0-NAA) including: k0-factors – combination of nuclear constants (atomic mass, isotopic abundance, gamma-ray yield and thermal neutron capture cross section); Q0 – the ratio of the resonance integral to thermal neutron capture cross section; and Er – effective resonance energy, along with the related nuclear data are presented and evaluated in the presentation. Accuracy and capability of k0-NAA depends considerably on the reliability of the above mentioned nuclear data. In general, the evaluation of nuclear data is essential and necessary in the field of nuclear science and technology, and this work is conducted by the nuclear data centers on the world as well as the research institutions where the nuclear data are usedfor R&D. Therefore, the evaluation of the nuclear data used in k0-NAA should also be performed so that some of data may no longer be appropriate should be redetermined. The evaluation of nuclear data in k0-NAA would contribute to the improvement of accuracy and reliability of the method, moreover, it would also contribute to the establishment a nuclear database in Vietnam in the future.

A determination of the130Te thermal neutron capture cross section

1984 ◽  
Vol 34 (6) ◽  
pp. 520-523 ◽  
Author(s):  
J. Honzátko ◽  
K. Konečný ◽  
Z. Kosina ◽  
F. Bečvář ◽  
E. A. Eissa
Keyword(s):  
Thermal Neutron ◽  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Thermal Neutron Capture ◽  
Capture Cross ◽  
Neutron Capture Cross Section

THERMAL NEUTRON CAPTURE CROSS-SECTION OF Na23 AND Mn55

1953 ◽  
Vol 31 (3) ◽  
pp. 204-206 ◽  
Author(s):  
Rosalie M. Bartholomew ◽  
R. C. Hawkings ◽  
W. F. Merritt ◽  
L. Yaffe
Keyword(s):  
Thermal Neutron ◽  
Cross Section ◽  
Cross Sections ◽  
Neutron Capture ◽  
Half Life ◽  
Capture Cross Section ◽  
Thermal Neutron Capture ◽  
Capture Cross ◽  
Neutron Capture Cross Section ◽  
Capture Cross Sections

The thermal neutron capture cross sections of Na23 and Mn55 have been determined using the activation method. The values are 0.53 ± 0.03 and 12.7 ± 0.3 barns respectively with respect to σAul97 = 93 barns. These agree well with recent pile oscillator results. The half-life for Mn56 is found to be 2.576 ± 0.002 hr.

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