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Evaluated the level density for proton induced nuclear resonances in (P+48Ti) reaction using different models
Other Title(s)
تقييم كثافة المستوي لبروتون يحرض رنين نووي للتفاعل (P + 48Ti) باستخدام نماذج متعددة
Joint Authors
Amin, Huda Zuhayr
Jasim, Mahdi Hadi
Source
Issue
Vol. 13, Issue 27 (31 Aug. 2015), pp.102-114, 13 p.
Publisher
University of Baghdad College of Science
Publication Date
2015-08-31
Country of Publication
Iraq
No. of Pages
13
Main Subjects
Abstract EN
The experimental proton resonance data for the reaction P+48Ti have been used to calculate and evaluate the level density by employed the Gaussian Orthogonal Ensemble, GOE version of RMT, Constant Temperature, CT and Back Shifted Fermi Gas, BSFG models at certain spin-parity and at different proton energies.
The results of GOE model are found in agreement with other, while the level density calculated using the BSFG Model showed less values with spin dependence more than parity, due the limitation in the parameters (level density parameter, a, Energy shift parameter, E1and spin cut off parameter, σc).
Also, in the CT Model the level density results depend mainly on two parameters (T and ground state back shift energy, E0), which are approximately constant in their behavior with the proton energy compared with GOE model.
The RMT estimation used to calculate the corrections of the incompleteness proton resonance measurement data by using two methods; the conventional analysis method, which depends on the resonance widths and the updated, developed, tested and applied a new analysis method, which depends mainly on the resonance spacings.
The spacing analysis method is found much less sensitive to non-statistical phenomena than is the width analysis method.
Where the analysis of a given data set via these two independent analysis methods indicated the increasing in the reliability of the determination of the missing fraction of levels, the observed fraction f between 0.87+0.13−0.11 – 0.68+0.12−0.12 for different spin-parity of this reaction and then the distinguishability in the level density calculations can be achieved.
The modified Porter Thomas distribution along with the maximum likelihood function have been used to get the missing levels corrections for 5 proton resonance sequences in the present reaction.
To estimate the present long-range correlations for pure sequence of levels the mean square of the deviation of the cumulative number of levels from a fitted straight line represented by the Dyson and Mehta Δ3 statistic has been employed for spin parity 12+, and calculated the <Δ3> against the cumulative number of proton levels.
American Psychological Association (APA)
Jasim, Mahdi Hadi& Amin, Huda Zuhayr. 2015. Evaluated the level density for proton induced nuclear resonances in (P+48Ti) reaction using different models. Iraqi Journal of Physics،Vol. 13, no. 27, pp.102-114.
https://search.emarefa.net/detail/BIM-721430
Modern Language Association (MLA)
Jasim, Mahdi Hadi& Amin, Huda Zuhayr. Evaluated the level density for proton induced nuclear resonances in (P+48Ti) reaction using different models. Iraqi Journal of Physics Vol. 13, no. 27 (2015), pp.102-114.
https://search.emarefa.net/detail/BIM-721430
American Medical Association (AMA)
Jasim, Mahdi Hadi& Amin, Huda Zuhayr. Evaluated the level density for proton induced nuclear resonances in (P+48Ti) reaction using different models. Iraqi Journal of Physics. 2015. Vol. 13, no. 27, pp.102-114.
https://search.emarefa.net/detail/BIM-721430
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 113-114
Record ID
BIM-721430