eV高エネルギー分解能TOF型Si結晶アナライザーBackscattering分光器DNA(J-PARC)における非弾性・準弾性散乱研究の現状

Status of inelastic and quasielastic neutron scattering study on micro eV TOF type Si crystal analyzer backscattering spectrometer DNA at J-PARC

柴田 薫  ; 川北 至信  ; 中川 洋   ; 山田 武*; 富永 大輝*; 松浦 直人*

Shibata, Kaoru; Kawakita, Yukinobu; Nakagawa, Hiroshi; Yamada, Takeshi*; Tominaga, Taiki*; Matsuura, Masato*

J-PARCセンター物質・生命科学実験施設MLFに設置されているSi結晶アナライザー背面反射TOF型高エネルギー分解能分光器DNAは、1.6micro eV以下の高エネルギー分解能を実現し高S/N比で広帯域に亘るmicro eV分解の非弾性散乱・準弾性散乱測定を世界に先駆けて実現した。本発表では、DNA分光器の平成29年度の現状と新たな研究成果を報告書する。

A time-of-flight (TOF) type near-backscattering spectrometer (n-BSS), DNA was built and started operation in 2012 at the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). It offers a high-energy resolution of about 1.6 micro eV and very wide energy scan range: -400 E/[micro eV] +600 with signal-to-noise ration of 100,000. Those factors gave big advantage to enlarge application fields to dynamical behaviors of atoms and spins in bio-molecules, soft-materials and strongly-correlated electron system in nanosecond timescale or in micro-eV energy region.