9-13 July 2012
Africa/Johannesburg timezone
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Statistical &gamma decay studies at iThemba LABS

Presented by Dr. D NEGI on 12 Jul 2012 from 17:30 to 19:30
Type: Poster Presentation
Session: Poster Session
Track: Track B - Nuclear, Particle and Radiation Physics

Abstract

The data from the study of the radiative strength function (RSF) of statistical &gamma rays from quasi continuum states in nuclei are critical in calculating nuclear reactions rates observed in astrophysical processes. They are also important for understanding the data from inertial confinement fusion at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL), USA which induces intense bursts of neutrons within tens of picoseconds. This flux is comparable to the neutron environments in core-collapse supernovae where r-process nucleosynthesis takes place. During this nuclei along the neutron drip line capture neutrons more rapidly compared to their disintegration due to beta decay, thus accounting for the creation of approximately half of the neutron rich nuclei with masses heavier than iron. In this talk I will discuss our planned research at iThemba LABS in collaboration with European and US institutions for the measurements of the RSF in various nuclei. The measurements will be carried out by a model independent method with the AFRODITE array in conjunction with an array of silicon particle detector telescopes. The method consists of simultaneously detecting &gamma rays from the quasi-continuum and discrete states together with charged particle. Energies of the detected particles are used to infer the “entrance excitation energy” of the residual nucleus. These entrance energies are used to study the feeding properties to different discrete states.

Award

No

Level

PhD

Paper

No

Place

Location: IT Building
Room:


Primary authors

  • Dr. D NEGI iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
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Co-authors

  • Dr. M WIEDEKING iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
  • Mr. B KHESWA iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
  • Dr. P PAPKA Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
  • Mr. T DINOKO iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
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