Administrator PNPN, 3 czerwca 2005 :

Dear npnp Colleagues

After having just joined the npnp club I would like to bring up the following question: Is there a joint move of the npnp community concerning future experiments with low-energy (neutron-rich) radioactive beams that will become available at new facilities such as DRIBS at Dubna, Russia, MAFF in Muenchen, germany, and SPIRAL2 at Caen, France?

One of the reasons for asking this question is that there are two related workshops coming up, one at Valencia on 15 and 16 June 2005 (see https://mural.uv.es/apecer/home.htm), concerning detectors for decay spectroscopy at FAIR, the other one at GANIL on 4/5 July (http://spiral2ws.ganil.fr/2005/lowenergy/), concerning physics at low-energy separated beams at SPIRAL2. Since this message is on low-energy beams, I cite the former workshop only because the DESPEC Project for FAIR has apparently features in common with thos erequired for decay measurements at low-nergy beams of SPIRAL2. Hence it lies close at hand to consider joint us of "moveable" detectors.

There may be colleagues in the npnp community, who are interested in future decay spectroscopy based on low-energy (neutron-rich) radioactive beams but have not been informed about the above-mention events. They may contact Marek Karny or Marek Pfutzner who are planning to attend the Valencia Workshop and/or Zenon Janas who is planning to participate in the GANIL Workshop.

I happened to be involved in writing the SPIRAL2 White Paper which describes the physics case. Based on this experinence I wonder whether there is any co-ordination within the npnp community concerning the above-mentioned detector developments. Let me give two examples. Firstly, it might be a good idea to have experts of deep-inelastice reactions (e.g. R. Broda, B. Fornal from Krakow) participating to clarify whether one should consider decay spectroscopy at low-energy beams with the view of completing such data (lateron) by in-beam spectroscopy in the high-energy area. Secondly, astrophysical experiments at low-energy beams should be considered such as preparation of samples for (n,gamma) or (p,gamma) measurements or beta-decay studies of r-process nuclei. There is some experience in this research field in Poland, e.g. here at Warsaw. However, there may be other pnpn colleagues interested to join.

With best regards

Ernst Roeckl