[RIBF-ULIC-miniWS-023] SUNFLOWER - In-beam gamma and MINOS

After first experiments with secondary beams produced from 48Ca and 238U primary beams in 2008 and 2009, a first longer in-beam gamma-ray spectroscopy experimental campaign using 48Ca primary beam was performed in November/December 2010. In 2011 and 2012, experimental campaigns using 238U, 124Xe, and 70Zn primary beams followed. Independently, the MINOS (MagIc Numbers Off Stability) project, led by the CEA Saclay, started in 2010 with the aim to develop an active liquid hydrogen target capable of vertex position reconstruction. The MINOS target cell will have a length of up to 150 mm and its performance will first be tested with fast beams in 2013. From 2014, it is planned to couple MINOS to the DALI2 gamma-ray spectrometer and BigRIPS/ZeroDegree. Also experiments with the SAMURAI spectrometer are envisaged. With MINOS, yield enhancements of up to one order of magnitude are expected compared to solid plastic, beryllium, or carbon targets. In addition, great efforts by the RIKEN Nishina Center's accelerator division have led to maximum achieved primary beam intensities of 415 pnA 48Ca, 100 pnA 70Zn, 27 pnA 124Xe, and about 10 pnA 238U at 345 MeV/u. For 2013, the development of a 78Kr primary is foreseen. The main objective for this SUNFLOWER - in-beam gamma and MINOS workshop is therefore the elaboration of in-beam experimental proposals/LOI taking advantage of these primary beam intensities and/or MINOS. Ideally, the proposals will be presented at the 12th NP-PAC meeting, held on June 28-29th, 2013 at the RIKEN Nishina Center. In addition to new experimental ideas and new developments (Clover Array, SHOGUN, MINOS), the status of performed experiments and the experimental conditions (DALI2 resolution and efficiency, atomic and other background, tracking detectors, etc.) will be discussed. Approved experiments seeking for a revision are encouraged to present their physics case.