Workshop on the SHOGUN gamma-ray spectrometer was held at the RIKEN Nishina Center, Japan on February 4-5, 2011.

The envisaged array is a Scintillator-based High-resOlution Gamma-ray spectrometer for Unstable Nuclei (SHOGUN) based on the novel scintillator LaBr3:Ce. The array would feature a high full-energy peak efficiency (> 30% at 1 MeV), a good time resolution (sub-ns) and an in-beam energy resolution that is well matched to the intrinsic energy resolution of LaBr3:Ce (~3% FWHM at 1 MeV). More detailed performance characteristics can be found in the SHOGUN construction proposal which was accepted by the RIBF NP-PAC last year:

http://ribf.riken.jp/~scheit/shogun-docs/shogun-proposal-2009.pdf

Subjects to be discussed during the workshop include:

• the latest developments in gamma-ray detection technology(including alternatives to LaBr3:Ce for the SHOGUN array),
• the physics cases with their particular requirements, including applications of the array outside RIKEN,
• ancillary detectors,
• structure of a formal SHOGUN collaboration to be formed.

Construction proposal of SHOGUN was submitted to the 6th PAC meeting held on Dec.3-4, 2009.