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Showing 1 to 20 of 23 for “"Bubble Chamber"”.
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Dark Matter Search with the PICO-40L Bubble Chamber
… The PICO collaboration, which operates bubble chambers in the search for WIMP-like dark matter, is currently operating the PICO-40L experiment at SNOLAB in Sudbury, Ontario, Canada. PICO-40L, the first large-scale implementation of the so-called "right side up" design, has been …
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Alpha Spectroscopy in a Superheated Bubble Chamber and the Design of the PICO-500 Hydraulic Control Cart
… study used background data from the PICO-40L bubble chamber to perform spectroscopic alpha decay analysis. The analysis results showed an improvement in the resolution of the AP and set upper limits on alpha decay rates from the Uranium and Thorium decay series in PICO-40L. Furthermore, the …
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Photoproduction of positive pions near threshold in hydrogen
… near threshold 0 To do this, a 1410 hydrogen bubble chamber was used in an X-ray beam with Emax = 230 MeV. Meson tracks could be observed from their origins in the photon beam. Only those events were used in which the '1T+ stopped and decayed in the visible region of the chamber. To suppress …
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Some two body final states of K- p interactions at 1.328 GeV/c
… Lawrence Radiation Laboratory's 72-inch hydrogen bubble chamber and the Scanning- Measuring Projector (SMP). We determined the total and partial cross sections and where possible the production and polarization angular distributions. of the final states. The angular distributions are discussed in …
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Part one: The reaction K-d -> K°nm, from threshold to 300 Mev/c; Part two: K+p elastic scattering: 80-280 Mev/c
… performed using the Berkeley 15 inch Hydrogen bubble chamber to measure the low energy K+ p elastic scattering cross section. Although the differential cross section is generally lower than those obtained by StUbbS,,!! the experiments are consistent to within the quoted experimental errors. has …
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The reaction K[superscript -] + p [right arrow] K[superscript -] + p + [pi][superscript +] + [pi][superscript -] at 2.63 and 2.70 BeV/c
… been performed using the 72"" Alvarez hydrogen bubble chamber with incident K- beams of 2063 and 2070 BeV/c. In a film sample of 90,000 frames, 9307 4-prong, zero V events were found and measured on SMP~s. The events were fitted using the Berkeley analysis program~ PACKAGE, and 1857 events were …
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The pi-minus proton omega channel in pi-minus proton interactions at five BeV
… were obtained with the Alvarez 72-inch hydrogen bubble chamber. *0 N production and B production were both observed. From a moment analysis of the angular distributions in the sequential decays B -> wpi, w -> 3pi, the B is found to have either JP = 1+ or JP = 2+3-4+ A qualitative argument against …
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Μελέτη των χαρακτηριστικών των γεγονότων με οπισθοδρομούντα πρωτόνια σε αντιδράσεις νετρινών και αντινετρινών σε Ne/H₂ στο θάλαμο φυσαλλίδων BEBC
… interactions, produced in the Big European Bubble Chamber (BEBC) by the neutrino and antineutrino wide-band beams (beam energy 10-300 GeV), is presented in this Thesis. The results obtained are compared with other experiments and theory. The complete backward proton data is compatible with …
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Spin parity studies of the eta pi decay of the A2 meson and investigation of the A2 production mechanism in the reaction pi-minus proton goes to A2-minus proton
… presented. Data for the analysis are drawn from bubble chamber experiments between 3.9 and 16 GeV/c. The analysis favors JP=Z+ for both the upper and lower regions of the AZ' Possible evidence for a weakly produced JP=l daughter state is also presented. The evidence comes largely from an …
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Use of Active Target Detectors in Nuclear Astrophysics: Nucleosynthesis of Fluorine and Fusion of Neon
… of fluorine experiment with a single fluid bubble chamber. The system of neon isotope fusions 20,22,24Ne + 20,22Ne, relevant to physics within neutron star crusts, was measured using the Argonne MUSIC detector. The details of each experiment and the analysis of the data will be discussed.
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Strange particle production in pi-p and pi+n interactions at 2.5 GeV/c
A bubble chamber experiment based upon 2.71 x 10^5 m pi- track length in hydrogen and 6.88 x 105 m~+ track length in deuterium has been performed to study strange particle production. Cross sections for pi-p reactions exhibit no marked departure from trends established by other experiments at …
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The reaction p p -> p p pi+ pi- at 7.9 BeV/c
… 7.9 BeV/c using the Brookhaven 80 inch hydrogen bubble chamber. App'roximate1y 3600 events of the 'reaction were identified; the cross section was determined to be 2.54 +/- .13 mb. The reaction is found to be dominated by production of the quasi-three body final state N*++ p pi-. A simple one …
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The reactions K-p -> Sigma±pi±, Sigma±pi±pi+pi-, and Sigma±pi±K+K- at 4.1 GeV/c and 5.5 GeV/c
… and 5.5 GeV/c in the MURA thirty-inch hydrogen bubble chamber. K track lengths equivalent to 0.95 IJ.b per event and 0.27 IJb per event have been analyzed at 4.1 GeV/c and 5.5 GeV/c, respectively. Differential cross sections are given for the ~rr+ final states, and the results obtained in this …
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The PICO-2L program: Towards Background-Free Dark Matter Direct Detection Using Bubble Chambers
… in 2013 with the deployment of a 2 litre bubble chamber filled with superheated C3F8 and over the next three years, conducted two separate WIMP-search experiments. The first run was conducted at 4 different energy thresholds ranging from 3.2 keV to 8.1 keV and a total of 12 candidate …
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A study of the K[superscript -] + p [right arrow] K + N + [pi] reactions at 1.33 BeV/c
… using the 72"" Alvarez liquid hydrogen bubble chamber. As part of that experiment the University ·of Illinois group investigated the following topologies: 2-prong, 2-prong with 1 kink, and O-prong with an associated vee. In particular, the reactions K + P -+ R + N + rr are reported here. …
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Strange-particle production in 8 BeV/c proton-proton interactions
… were obtained of the 80 Ii Brookhaven hydrogen bubble chamber exposed to 8 BeV/c protons. All 2, 4, 6, and 8 prong events with one or more associated kinks or V's were scanned for and 7,300 candidates for strange particle events were found. Of these, 3,600 were successfully measured and3 of …
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Six-prong events in [pi]{u207B}p interactions at 7.0 GeV/C
… from 7.0 GeV/c π⁻p film taken at the BNL 80-inch bubble chamber. The events were fitted to the final states π⁻p → π⁻π⁻π⁻π⁺π⁺p 211 events (1) π⁻p → π⁻π⁻π⁻π⁺π⁺pπ⁰ 535 events (2) π⁻p → π⁻π⁻π⁻π⁺π⁺π⁺n 230 events (3) We find the total six-prong cross section to be 2.40 ± 0.27 mb. The partial cross …
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Production of three charged pions in pi minus proton interactions at 5 Bev/c
"The 72"" Bubble Chamber at the Lawrence Radiation Laboratory has been exposed to a beam of 5 Bev/c pi- mesons and 150,000 photographs have been taken. As a part of this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> …
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A-2 meson production in pi-minus proton interactions at five BeV
… at 5 BeV/c in the 72""Alvarez liquid hydrogen bubble chamber. The p pi decay mode in the 4-constraint, p pi+ pi- pi- final state is treated in detail. Fit.s to the 3TI invariant mass spectrum yield a central mass value and width of 1.296±.008 and .l05±.035 BeV. respectively, for the A2 when the …
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Photoproduction of charged pions from deuterium near threshold
… was passed through a 14 inch liquid deuterium bubble chamber. Each X ·-ray pulse (E max :: 230 MeV) contained a total energy of about 106 MeV. l'ne X.""ray beam wa.s hardened by means of a. standard beam . hardening technique to reduce the electron background. The X-ray beam monitor was …
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