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Nuclear Seminars 2014 Fall


  Title: Underground nuclear astrophysics for the Sun, and for the Big Bang
  Speaker: Dr. Daniel Bemmerer
  Institute: Helmholtz-Zentrum Dresden-Rossendorf, Germany
  Date: Monday, November 10, 2014
  Time: 4:00 - 5:00 pm EST
  Place: Nieuwland Science Hall, Room 124

  Abstract:

After the resolution of the solar neutrino problem in 2002, the study of the Sun has now entered a precision era, and an entirely new dilemma has come up: New elemental abundance data from Fraunhofer line analyses are in contradiction with helioseismological observables. Observations of 13N and 15O neutrinos from the Sun may address this so-called solar abundance problem, but their interpretation will require precise nuclear reaction data. Due to the low cross sections involved, such data can only be provided by experiments in an underground low-background setting. Work at the world's only underground accelerator, the 0.4 MV LUNA machine in Gran Sasso (Italy), on solar fusion reactions and on the Big Bang production of lithium-6 and -7 will be reviewed. In addition, some surface-based data on radiative capture reactions on 12C, 14N, and 40Ca will be shown. The status and working program of the planned higher-energy underground accelerator at the Dresden Felsenkeller in Germany will be discussed.


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
TBA November 17 Dr. Alain Lapierre
NSCL/MSU





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