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Author :
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (91 download)
Download or read book Neutron Capture Cross Sections and the S-process written by and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel Bartlett Stroud
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.:/5 (224 download)
Download or read book Measurements of Neutron Capture Cross Sections Relevant to the S-process of Element Formation in Stars written by Daniel Bartlett Stroud and published by . This book was released on 1972 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph L. Fowler
Publisher :
ISBN 13 :
Total Pages : 1062 pages
Book Rating : 4.3/5 (121 download)
Download or read book Nuclear Cross Sections for Technology written by Joseph L. Fowler and published by . This book was released on 1980 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michel Baranger
Publisher : Springer Science & Business Media
ISBN 13 : 1461582288
Total Pages : 463 pages
Book Rating : 4.4/5 (615 download)
Download or read book Advances in Nuclear Physics written by Michel Baranger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author :
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ISBN 13 :
Total Pages : 95 pages
Book Rating : 4.:/5 (719 download)
Download or read book Neutron capture cross sections of the krypton isotopes and the s'-process branching at Se written by and published by . This book was released on 1984 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David T. Goldman
Publisher :
ISBN 13 :
Total Pages : 670 pages
Book Rating : 4.3/5 (91 download)
Download or read book Neutron Cross Sections and Technology written by David T. Goldman and published by . This book was released on 1968 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (91 download)
Download or read book Capture Cross-sections for Fast Neutrons written by and published by . This book was released on 1948 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. B. Hemmig
Publisher :
ISBN 13 :
Total Pages : 572 pages
Book Rating : 4.E/5 ( download)
Download or read book Conference on Neutron Cross Section Technology written by P. B. Hemmig and published by . This book was released on 1966 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (893 download)
Download or read book High-resolution Neutron Capture and Transmission Measurements and the Stellar Neutron Capture Cross Sections of {sup 116,120}Sn written by and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 116Sn. 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 12°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 121Sn) the relative abundances of the three s-only isotopes of Te.
Author : K. H. Guber
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Experimental determination of the stellar neutron capture cross sections of SUP(148)SM and SUP(150)SM and the consequences for the S-process written by K. H. Guber and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Capture Cross Sections for 86Sr and 87Sr at Stellar Temperatures. Revision 1 written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent work on s-process nucleosynthesis has focused attention on the investigation of capture cross sections for nuclei in the mass region near the N = 50 closed neutron shell. Of special astrophysical interest are (i) the analysis of the s-process branching through 85Kr as a monitor of stellar neutron density and temperature and (ii) the investigation of the possible chronometric pair 87Rb-87Sr as an independent measure of the age of the galaxy. For both problems the capture cross sections of the two pure s-process nuclei 86Sr and 87Sr have to be known to an accuracy of 5% or better. The current investigation of the neutron capture cross sections for 86Sr and 87Sr was undertaken to extend recent measurements by Walter and Beer to energies below 3.5 keV, where strong resonances are known to exist, and to explore the discrepancy in the results of the Maxwellian averaged capture cross section of 87Sr at kT = 30 keV as reported by previous investigators. 9 refs., 1 fig.
![Download High-resolution Neutron Capture and Transmission Measurements and the Stellar Neutron Capture Cross Sections Of[sup 116,120]n PDF Online Free](https://books.google.com/books/content/images/frontcover/8lmnDAEACAAJ?fife=w200-h370)
Download or read book High-resolution Neutron Capture and Transmission Measurements and the Stellar Neutron Capture Cross Sections Of[sup 116,120]n written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
![Download New Neutron Capture and Total Cross Section Measurements On[sup 88]r and Their Impact on S-process Nucleosynthesis PDF Online Free](https://books.google.com/books/content/images/frontcover/CTHVjwEACAAJ?fife=w200-h370)
Download or read book New Neutron Capture and Total Cross Section Measurements On[sup 88]r and Their Impact on S-process Nucleosynthesis written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have made new and improved measurements of the neutron capture and total cross sections of[sup 88]Sr at the Oak Ridge Electron Linear Accelerator (ORELA). Improvements over previous measurements include a wider incident neutron energy range, the use of metallic rather than carbonate samples, better background subtraction, reduced sensitivity to sample-dependent backgrounds, and better pulse-height weighting functions. Because of its small cross section, the[sup 88]Sr(n, [gamma]) reaction is an important bottleneck during the s-process nucleosynthesis. Hence, an accurate determination of this rate is needed to better constrain the neutron exposure in s-process models and to more fully exploit the recently discovered isotopic anomalies in certain meteorites. They describe the experimental procedures, compare the results to previous data, and discuss their astrophysical impact.
Author :
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.3/5 (91 download)
Download or read book Measurements of Low Energy Neutron Cross Sections of Non-fissile Nuclides and Their written by and published by . This book was released on 1966 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S Mughabghab
Publisher : Elsevier
ISBN 13 : 0323142354
Total Pages : 847 pages
Book Rating : 4.3/5 (231 download)
Download or read book Neutron Cross Sections written by S Mughabghab and published by Elsevier. This book was released on 2012-12-02 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron Cross Sections, Volume 1: Neutron Resonance Parameters and Thermal Cross Sections, Part A represents the fourth edition of what was previously known as BNL-325, Neutron Cross Sections, Volume 1. This three-chapter book provides the extensive list of detailed individual resonance parameters for each isotope. The first chapter deals with the thermal cross sections and average resonance parameters, as well as the physics of thermal and resonance neutrons, with particular emphasis on evaluation methods. This chapter also includes tables of standards of capture cross sections and scattering lengths, and commonly used nuclear physics formulas. The second chapter covers the direct or valence capture and the Brink-Axel treatment of electric dipole radiation. These topics are followed by a discussion on spin-dependent scattering lengths that are of interest to solid state. The third chapter describes the Maxwellian 30-keV capture cross sections that are of importance to studies of nucleosynthesis and age of the universe. This chapter also examines the s- and p-wave average radiative widths and gamma-ray strength functions that are required in capture cross section measurements. This book will appeal to nuclear and astrophysicists.
Author : Myron Gordon Silbert
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (89 download)
Download or read book Fast-neutron Capture Cross Sections of Intermediate and Heavy Nuclei written by Myron Gordon Silbert and published by . This book was released on 1959 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 27 pages
Book Rating : 4.3/5 (91 download)
Download or read book Neutron Cross Sections and Related Measurements written by and published by . This book was released on 1966 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
