Measurement of the total neutron cross-section and resonance parameters of molybdenum using pulsed neutrons generated by an electron linac

Wang, T.F.; Meaze, M.; Khandaker, Mayeen Uddin; Rahman, Md. Shakilur; Kim, G.N.; Zhu, Liping; Haihong, Xia; Zhou, Zuying; Oh, Y. D.; Kang, Heung-Sik; Cho, M.H.; Ko, In Soo; Namkung, W.

doi:10.1016/j.nimb.2007.11.051

Cited by 20 publications

(4 citation statements)

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“…The angular distribution data (the Legendre expansion coefficients) of neutron elastic scattering were also replaced by the POD calculations using the OMPs of Koning and Delaroche 23) above 6 MeV in order to improve the reproducibility of experimental data. 124) who obtained the RRPs from their transmission measurements. As for 92 Mo, a negative resonance was inserted at À2:45 keV in order to reproduce the measured thermal capture cross section 125) and the thermal scattering cross section recommended by Mughabghab.…”

Section: )mentioning

confidence: 99%

JENDL-4.0: A New Library for Nuclear Science and Engineering

Shibata

Iwamoto

Nakagawa

et al. 2011

J. Nucl. Sci. Technol.

169

152

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The fourth version of the Japanese Evaluated Nuclear Data Library has been produced in cooperation with the Japanese Nuclear Data Committee. In the new library, much emphasis is placed on the improvements of fission product and minor actinoid data. Two nuclear model codes were developed in order to evaluate the cross sections of fission products and minor actinoids. Coupled-channel optical model parameters, which can be applied to wide mass and energy regions, were obtained for nuclear model calculations. Thermal cross sections of actinoids were carefully examined by considering experimental data or by the systematics of neighboring nuclei. Most of the fission cross sections were derived from experimental data. A simultaneous evaluation was performed for the fission cross sections of important uranium and plutonium isotopes above 10 keV. New evaluations were performed for the thirty fissionproduct nuclides that had not been contained in the previous library JENDL-3.3. The data for light elements and structural materials were partly reevaluated. Moreover, covariances were estimated mainly for actinoids. The new library was released as JENDL-4.0, and the data can be retrieved from the Web site of the JAEA Nuclear Data Center.

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Section: )mentioning

confidence: 99%

JENDL-4.0: A New Library for Nuclear Science and Engineering

Shibata

Iwamoto

Nakagawa

et al. 2011

J. Nucl. Sci. Technol.

169

152

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“…A Gaussian fitting tool was used to fit the reconstructed time spectrum of two algorithms to obtain the parameters in Eq. (7). Comparing the theoretical parameters and simulation results, the maximum error of those characteristic parameters is less than 2.3%, which is the relative error of σ obtained by the WWS algorithm.…”

Section: ŷ1 (T)mentioning

confidence: 78%

“…In this paper, the given time spectrum of the pulsed neutron source is described by Eq. ( 7): The time spectrum is Gaussian, the sampling duration is T = 20 μs, the peak appears at t c = 8 μs, full width at half maximum (FWHM) is 2.94 μs and this pulsed source produces a total of 2.5 ×10 7 neutrons. The neutron single particle pulse amplitude is defined according to the neutron pulse amplitude distribution function H n (t).…”

Section: A Simulation Of the Response Process Of Organic Scintillator...mentioning

confidence: 99%

“…In recent years, pulsed radiation sources have become very important in the defense and nuclear energy industries because they can produce high intensity radiation particles in a short time [5,6]. The output of those devices is discontinuous when operated in pulsed mode or at relatively long intervals [7]. Typical examples are pulsed accelerator neutron sources [8,9], Tokamak devices [10], and spallation neutron sources [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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A transient process observation method based on the non-homogeneous Poisson process model *

Zhao¹,

Ouyang²,

Guo³

et al. 2021

Chinese Phys. C

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The current-mode-counting method is a new approach to observing transient processes, especially in transient nuclear fusion, based on the non-homogeneous Poisson process (NHPP) model. In this paper, a new measurement process model of the pulsed radiation field produced by transient nuclear fusion is built based on the NHPP. A simulated measurement is performed using the model, and the current signal from the detector is obtained by simulation based on Poisson process thinning. The neutron time spectrum is reconstructed and is in good agreement with the theoretical value, with its maximum error of a characteristic parameter less than 2.3%. Verification experiments were carried out on a CPNG-6 device at the China Institute of Atomic Energy, with a detection system with a nanosecond response time. The experimental charge amplitude spectra are in good agreement with those obtained by the traditional counting mode, and the characteristic parameters of the time spectrum are in good agreement with the theoretical values. This shows that the current-mode-counting method is effective for the observation of transient nuclear fusion processes.

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Neutron Cross Section Measurements

Block

Danon

Gunsing

et al. 2010

Handbook of Nuclear Engineering

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The main emphasis during the past year has been on analyzing and publishing results and the preparation for the impending start-up of the newly modified Nevis cyclotron. Papers on the separated isotopes of Yb and W have been submitted to the Physical Review. The published results on Er confirm Dyson's theory of level spacing systematics. The total cross section, resonance parameters and spin-parity values of Na below 300 keV have been submitted for publication. A report on the evaluation of the T's of U 238 has been distributed. We now have extensive results on the Er isotopes, 232 U, 152 > 15lt Sm, 151 , 153 Eu, Fe, La, In, Ta, F, Mg, Al, S, CI, K and Ca. A paper on the precision measurement of the 2200 m/sec neutron-proton capture cross section has been submitted for publication. The background for fission measurements has been extensively analyzed and modifications to the neutron source of the Nevis cyclotron will be made for the next run. New methods of analyzing low count rate data have been developed to eliminate observation of spurious levels. The captive cross sections of thulium and rhodium have been analyzed and the results reported. During the report period, our main emphasis has been on analyzing and publishing data, and the preparation for the impending startup of the newly modified Nevis cyclotron. A number of major papers and reports on our results have been published or submitted for publication. Papers on the neutron resonance spectroscopy and systematics of the separated Yb isotopes and the separated W isotopes have been submitted to the Physical Review. These papers round out our recent work on many of the rare earth isotopes, 150<_ A< 190, with a paper on the separated even Gd isotopes in preparation and tne separated Dy isotopes expected to be ready soon. The published paper on the Er isotopes, confirming Dyson's theories concerning level spacings systematics, has led to extensive Monte-Carlo theoretical studies by our group, partly on the basis of interactions with Professor Freeman Dyson. These studies have extended the understanding of the implications of the statistical orthogonal ensemble theory and have permitted a detailed comparison with our results for many even-even nuclei, 150 < A< 190, which supports this theory well for the first time. "The total cross section, resonance parameters and spin-parity values for Na below 300 keV has been submitted to Nuclear Science and Engineering for publication. An evaluation report on the total radiation widths of the important reactor material 238 U has concluded that there is no convincing evidence for quasi-periodic structure in r versus energy (apart from a statistical level to level fluctuation of a high chi-squared number of degrees of freedom). The fluctuations in r present in many data sets are most likely due to experimental uncertainties in the r values themselves. Our best evaluated average radiation width was taken to be = 23.55 + 0.16 meV. T We now have.extensive results for the resonance parameters and systematics for a large ...

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Measurement of the total neutron cross-section and resonance parameters of molybdenum using pulsed neutrons generated by an electron linac

Cited by 20 publications

References 11 publications

JENDL-4.0: A New Library for Nuclear Science and Engineering

JENDL-4.0: A New Library for Nuclear Science and Engineering

A transient process observation method based on the non-homogeneous Poisson process model *

Neutron Cross Section Measurements

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