Neutron Capture Cross Sections and the S-process PDF Download
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Languages : en
Pages : 44
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Book Description
Author:
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ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: Daniel Bartlett Stroud
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 272
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Author: Joseph L. Fowler
Publisher:
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Category : Cross sections (Nuclear physics)
Languages : en
Pages : 1062
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Book Description
Author: Michel Baranger
Publisher: Springer Science & Business Media
ISBN: 1461582288
Category : Science
Languages : en
Pages : 463
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Book Description
1 The Investigation of Hole States in Nuclei by Means of Knockout and Other Reactions.- 1. Introduction.- 2. Formalism for Knockout and Pickup Reactions.- 2.1. The Matrix Element and Overlap Integral.- 2.2 The Single-Nucleon Case.- 2.3. The Two-Nucleon Case.- 2.4. The Multi-Nucleon Case.- 2.5. Distortion and Finite-Range Effects.- 3. Single-Nucleon Knockout and Related Reactions.- 3.1. Comparison of Knockout and Pickup Reactions.- 3.2. Special Features of Knockout Reactions.- 3.3. Spectroscopic Studies.- 3.4. Proton States.- 3.5. Neutron States.- 4. Cluster Knockout and Related Reactions.- 4.1.
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Category :
Languages : de
Pages : 95
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Author: David T. Goldman
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Category : Neutron cross sections
Languages : en
Pages : 680
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Author:
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ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 60
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Book Description
Author: P. B. Hemmig
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Category : Neutron cross sections
Languages : en
Pages : 572
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Author: K. H. Guber
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Category :
Languages : en
Pages : 0
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![High-resolution Neutron Capture and Transmission Measurements and the Stellar Neutron Capture Cross Sections Of[sup 116,120]n PDF](https://books.google.com/books/content/images/frontcover/8lmnDAEACAAJ?fife=w80-h100)
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Languages : en
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Improved astrophysical reaction rates for[sup 116,120]Sn(n, [gamma]) are of interest because nucleosynthesis models have not been able to reproduce the observed abundances in this mass region. For example, previous s-process calculations have consistently underproduced the s-only isotope[sup 116]Sn. Also, these studies have resulted in residual reprocess abundances for the tin isotopes which are systematically larger than predicted by reprocess calculations. It has been suggested that these problems could be solved by reducing the solar tin abundance by 10-20%, but there is no experimental evidence to justify this renormalization. Instead, it is possible that the problem lies in the (n, T) cross sections used in the reaction network calculations or in the s-process models. One reason to suspect the (n, [gamma]) data is that previous measurements did not extend to low enough energies to determine accurately the Maxwellian-averaged capture cross sections at the low temperatures (kT=6-8 keV) favored by the most recent stellar models of the s process. Also, the two most recent high-precision measurements of the[sup 120]Sn(n, [gamma]) cross section are in serious disagreement. Because of its small size, this cross section could affect (via the s-process branching at[sup 121]Sn) the relative abundances of the three s-only isotopes of Te.
