First neutron production utilizing J-PARC pulsed spallation neutron source JSNS and neutronic performance demonstrated

Neutron capture cross section measurements of120Sn,122Sn and124Sn with the array of Ge spectrometer at the J-PARC/MLF/ANNRI

“…The neutron spectrum was measured by detecting the 478-keV γ rays emitted from the 10 B(n,αγ ) 7 Li reaction. In the measurement, clear photo-peak of the 478-keV γ rays were observed.…”

“…[6]. J-PARC is normally operated with "double-bunch mode", in which each proton pulse consists of two bunches (each with a width of 100 ns) at intervals of 600 ns [7]. The simulated resolution function at the 21.5-m sample position is described in Ref.…”

Quantum Beam Science—Applications to Probe or Influence Matter and Materials

“…Dedicated neutron facilities such as the Institut Laue Langevin (ILL), hosting over 40 instruments, became the state-of-the-art multi-user facilities where high-flux, compact cores are used, and beams are guided away from the reactor to dedicated instruments [6]. More recently, spallation sources have been developed, of which flagships are the Spallation Neutron Source (SNS) in the USA [7] and J-PARC in Japan [8], to be soon followed by the European Spallation Source (ESS) project in Sweden [9]. In such sources, highly accelerated proton beams are sent to a target evaporating neutrons from its nuclei, called spallation.…”

Measurement of the neutron capture cross section of 99Tc using ANNRI at J-PARC

“…ANNRI has been built for nuclear data measurement utilizing a high-intensity pulsed neutron beam from a spallation neutron source [3] in the Materials and Life Science Facility of J-PARC. The neutron capture cross section of 99 Tc was measured from thermal to keV neutron energy region.…”