PI: Gianluca Imbriani

WG members: M. Aliotta, A. Best, A. Boeltzig, C. Bruno,  R. Buompane, R. deBoer, A. Di Leva, A. Formicola, L. Gasques, L. Gialanella, G. Gyurky, M. Junker, F. Pantaleo, R. Perrino, L. Schiavulli, F. Strieder, M. Wiescher


Astrophysical Motivation:

  •  Link between NeNa and MgAl cycles

Experimental Aims

  • detection of the 140 keV resonance
  • measurements of gamma branchings and possibly better restricted resonance strengths of the 250 keV resonance
  • search for direct capture

Experimental Setup

We bombard solid sodium targets, produced by evaporating sodium salts onto a tantalum backing. The selection of the sodium compound is governed by practical considerations, such as the stoichiometry and stability before and during bombardment.

Two detector setups are used for different purposes:

  1. A bismuth germanium oxide (BGO) detector to maximize detection efficiency and search weak resonances and cross sections.
  2. A HPGe detector for gamma ray spectroscopy with high energy resolution.

Measurements with the BGO setup will hence focus on the 140 keV resonance search and measurements around the 250 keV resonance. The HPGe setup will be used for measurements at higher energies.

Both setups are shielded with lead to reduce the environmental gamma ray background.