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Nuclear Seminars 2014 Fall


  Title: Ion Traps for Astrophysics
  Speaker: Dr. Jason Clark
  Institute: Argonne National Laboratory
  Date: Monday, December 15, 2014
  Time: 4:00 - 5:00 pm EST
  Place: Nieuwland Science Hall, Room 124

  Abstract:

The astrophysical r process is thought to be responsible for the creation of half of the elements heavier than iron. In an attempt to reproduce the observed distribution of element abundances in the universe, models are generated which inherently rely upon many nuclear physics inputs, including the masses of the nuclides involved and their beta-decay properties. However, the uncertainties in these nuclide properties are often too large and limit our understanding of heavy-element nucleosynthesis, yet more precise measurements of these properties are difficult to obtain since a large number of the nuclides involved in the astrophysical r process are often too challenging to produce at accelerator facilities. Recently the CARIBU facility, an upgrade to Argonne National Laboratory's ATLAS facility, has started to provide intense beams of a number of these previously elusive neutron-rich nuclei. A program of mass measurements at CARIBU is now underway with the Canadian Penning trap mass spectrometer. In addition, a specially designed ion trap is currently being developed to facilitate a new program of beta-decay spectroscopy using nuclides produced by CARIBU. This new technique of using ion traps to perform beta-decay studies could significantly advance the field, just as ion traps had done in the field of mass spectroscopy. The ion trapping techniques and the results/implications of some of the first measurements will be presented.


Topic

Date

Speaker

The reactions 12C(α,γ)16O and 12C+12C
in direct experiments – Present status
and perspectives
August 18 Dr. Frank Strieder
Ruhr-Universität Bochum, Germany
Labor Day September 1
Fundamental Symmetries and
Quantum Chaos
September 8 Prof. Vladimir Zelevinsky
NSCL, MSU
High-precision Penning trap mass spectrometry of stable and long-lived isotopes September 15 Prof. Mathew Redshaw
Central Michigan University
Special Nuclear Seminar:
New frontiers of high energy density
science on the NIF laser
September 23 Dr. Bruce Remington
Lawrence Livermore National Lab
Science in a melting pot - TRIUMF's efforts to advance the field of isotope production September 29 Dr. Paul Schaffer
TRIUMF, Canada
Fall Break October 20
Underground nuclear astrophysics
for the Sun, and for the Big Bang
November 10 Dr. Daniel Bemmerer
Helmholtz-Zentrum Dresden-Rossendorf, Germany
The Electron-Beam Ion Trap (EBIT) chargebreeder of the ReA post-accelerator November 24 Dr. Alain Lapierre
NSCL/MSU
Special Nuclear Seminar: Charge-exchange reaction studies combined with gamma-ray spectroscopy for astrophysical applications December 9 Tuesday Dr. Shumpei Noji
NSCL/MSU
Ion Traps for Astrophysics December 15 Dr. Jason Clark
Argonne National Laboratory
TBA April 20, 2015 Prof. Anatoli Afanasjev
Michigan State Universit


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