[en] New types of lepton experiments have been considered for the future use of 12 GeV synchrotron at KEK. In particular, value as well as feasibility are discussed on the possible muon-nucleus scattering experiments. Studies of the nucleus by the electric muon scattering with a low momentum transfer are emphasized to investigate unrevealed new aspects of the nucleus. A layout of lepton scattering facility is considered including stopped muon and collimated neutrino experiments as possible by-procuts. (author)

[en] In these several years, new discoveries have been undertaken in the μCF experiments such as (a) anomalous condensed-matter effect in both molecular formation (D₂, D-T) and μ^- regeneration from the alpha sticking (D-T), (b) high temperature and energetic (tμ) effect in molecular formation (D₂), (c) ortho-para effect in molecular formation (D₂) etc. Also significant progress has been marked in theoretical studies regarding 1) calculation of the loosely bound states of muonic molecules, 2) molecular formation rate in solid D₂ and 3) description of cascade process in muonic atoms. The recent μCF researches open the way to use this phenomenon for construction of the intense 14-MeV neutron source and the effective breeder

[en] It is our great pleasure to deliver Abstracts of the papers presented at the International Workshop on the Future of Muon Science, which was held on March 7 to 9, 2002 at KEK and at RIKEN. The earlier part of the Workshop held at KEK was focussed on the subjects of μSR studies on condensed matter, in particular, for strongly correlated electron systems and other topics. There were 7 presentations and 25 posters with short presentations. Then, reports on future beam line and facilities to be built at the JAERI-KEK joint project and related world-wide facilities were presented followed by the open discussions on Future Muon Facility and Possible International Collaboration. (author)

[en] X-ray studies on muon-catalyzed fusion with pulsed muons are reviewed. The muonic X-ray observation method is used to determine the μ-α sticking probability from the μ⁴He atom. The sticking probability for the X-ray method ω_s (X) (below 0,36%) is smaller than that for the neutron method ω_s(n) (0.46±0.07%). The experimentally obtained ω_s(X) is far smaller than any of the theoretical predictions

[en] In order to realize an advanced concept of intense and high-quality neutrino beam, we propose to employ the method of the zero-energy cooling, namely, the generation of ultraslow μ⁺ by ionizing thermal muoniums emitted from the surface of a hot noble metal after stopping as much as possible a high-energy μ⁺ beam produced by the accelerator. A realistic yield estimation is given

[en] This is the report of the third meeting on the future plan for booster-utilizing facilities, held for three days from March 1, 1984. In this meeting, the examination on a neutron scattering experiment facility and a muon experiment facility which correspond to the performance of an accelerator, and on which the examination advanced relatively in the previous meetings, was the main theme, and this examination of the future plan became serious. The outline of the GEMINI project utilizing the proton beam from the 500 MeV booster synchrotron for the 12 GeV proton accelerator in the National Laboratory for High Energy Physics, the technical problems of GEMINI and the countermeasures are described. The booster synchrotron meson facility (BOOM) at present and the proposal to create a super-BOOM and a kaon factory are reported. The way to realize the GEMINI project is discussed. The KENS-1' project, the technical problem of KENS-2 and the present status and future prospect of neutron scattering are reported by the Neutron Scattering Subcommittee. The super-BOOM project, the themes of nuclear physics and future meson science are reported by the Meson Science Subcommittee. (Kako, I.)

[en] Since the first successful operation of superconducting muon channel in July 1980, various important progresses have been made during the first series of beam times since October 1980. This report describes summaries of the achievements concerning facility construction and experimental results utilizing, the intense pulsed muons. (author)

[en] Recent progress in muon polarization phenomena upon which the fruitfulness of the applied muon sciences is based is reviewed with emphasis on the recently realized method of μ^- spin repolarization with polarized nuclear targets as well as the new spectroscopy method of μ⁺/Muonium state under decoupling fields. Both represent the successful challenge against missing signals at t=O. Then μSR experiments on solitons in polyacetylene produced and probed by positive muons are described

[en] New types of both fundamental and applied experimental investigations are considered as future programs at either LAMPF II or other accelerator projects like PSR, SNS, GEMINI, etc. Emphasis has been given to the new types of experiments under the conditions that will be prepared by the muons with extraordinarily instantaneous intensity

[en] Mechanisms of residual nucleus formation after pion and muon capture are summarized, where a particular attention was paid for the processes of isomer production, many nucleon emission, neutronless capture, etc. New results on the isomer production after pion capture are presented whose experiments are performed at UT-MSL pulsed meson facility. (author)