This experiment is from the series of the spin rotation parameter measurements performed by the PNPIITEP collaboration during the last decade [1−5]. The main goal of this studies was to enrich the experimental data base of partial-wave analyses (PWA) with qualitatively new information on the spin rotation parameters, which have never been measured in the incident pion momentum interval under co...

We report on preliminary results for the production of neutral mesons by 750 MeV/c π− on complex nuclear targets (C, Al, Cu) and hydrogen. Our simultaneous measurement of π, 2π, and η final states allows an investigation of the nuclear final-state-interaction effects. The data show that nuclear absorption is mainly responsible for an observed change in the shape of the 2π invariant mass spectra...

Currently several institutes worldwide are working on the development of a new generation of ultracold neutron (UCN) sources. In parallel with source development, new materials for guiding and storage of UCN are developed. Currently the best results have been achieved using (58)Ni, Be, solid O2 and low temperature Fomblin oil (LTF). All of these materials have their shortcomings like cost, toxi...

The asymmetry parameter P was measured for the elastic pion-proton scattering in the very backward angular region of θcm ≈ 150 − 170 o at several pion beam energies in the invariant mass range containing most of the pion-proton resonances. The general goal of the experimental program was to provide new data for partial wave analyses in order to resolve their uncertainties in the baryon resonanc...

Nuclei close to the N = Z line in the region near A = 80 play a special role in nuclear astrophysics since the rapid proton (rp) capture process is passing right through them (see Fig. 1). The rp-process, a sequence of rapid proton captures and β-decays, proceeds along the N = Z line up to Ni and it can continue ending in a SnSbTe cycle either in explosive X-ray bursts or in a steady state burn...