New breakthroughs in the calculations of fission potential-energy surfaces

PDF Version Also Available for Download.

Description

We present calculations based on a realistic theoretical model of the multi-dimensional potential-energy surface of a fissioning nucleus. This surface guides the nuclear shape evolution from the ground state, over inner and outer saddle points, to the final configurations of separated fission fragments. Until recently, no calculation has properly explored a shape parameterization of sufficient dimensionality to permit the corresponding potential-energy surface to exhibit the multiple minima, valleys, saddle points and ridges that correspond to characteristic observables of the fission process. Here we calculate and analyze five-dimensional potential-energy landscapes based on grids of several million deformation points. We find that ... continued below

Physical Description

8 p.

Creation Information

Moller, P. (Peter); Madland, D. G.; Sierk, A. J. (Arnold J.) & Iwamoto, A. (Akira) January 1, 2001.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

We present calculations based on a realistic theoretical model of the multi-dimensional potential-energy surface of a fissioning nucleus. This surface guides the nuclear shape evolution from the ground state, over inner and outer saddle points, to the final configurations of separated fission fragments. Until recently, no calculation has properly explored a shape parameterization of sufficient dimensionality to permit the corresponding potential-energy surface to exhibit the multiple minima, valleys, saddle points and ridges that correspond to characteristic observables of the fission process. Here we calculate and analyze five-dimensional potential-energy landscapes based on grids of several million deformation points. We find that observed fission features such as different energy thresholds for symmetric and asymmetric fission and fission-fragment mass and kinetic-energy distributions are very closely related to properties of the valleys and mountain passes present in the calculated five-dimensional energy landscapes. We have also determined fission-barrier heights for 31 nuclei throughout the periodic system. KEYWORDS: nuclear fission, fission barrier, multi-mode fission

Physical Description

8 p.

Source

  • Submitted to: International Conference on Nuclear Data for Science and Tech. (ND2001), October 7-12, 2001, Tsukuba International Congress Center, Tsukuba, Japan

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LA-UR-01-4851
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975714
  • Archival Resource Key: ark:/67531/metadc928471

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

Description Last Updated

  • Dec. 12, 2016, 4:20 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Moller, P. (Peter); Madland, D. G.; Sierk, A. J. (Arnold J.) & Iwamoto, A. (Akira). New breakthroughs in the calculations of fission potential-energy surfaces, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc928471/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.