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Showing 1 to 20 of 55 for “"Near-threshold"”.
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Photonuclear reactions near threshold
… the shapes of the cross sections curves near threshold, evidence has been obtained which indicates that electric quadupole and magnetic dipole absorption of photons account for a large part of the reation yield, although electric dipole absorption may account for most of the reaction at …
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Photopion Production in Helium Near Threshold
Made available in DSpace on 2015-05-12T17:03:32Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0013547.PDF: 1260569 bytes, checksum: 6ec86c0aa2c90fe14b658d0bd3938005 (MD5) Previous issue date: 1955
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The Photoneutron Cross-Section Near Threshold
Made available in DSpace on 2015-05-12T17:03:36Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6001643.PDF: 6468869 bytes, checksum: a5c985fb1878723d9e5925120fd64e2f (MD5) Previous issue date: 1960
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Near threshold coincident electrofission of uranium-238
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T16:01:46Z No. of bitstreams: 1 1981_dowell.pdf: 4824053 bytes, checksum: 83f774456dafad35d3d2a555a23bb282 (MD5)
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A Measurement of `pp��`LL near threshold
… an investigation of the reaction pp -+ AA at threshold has been completed. This work includes a thorough scan of the 2 MeV region where a hint of a cross section resonance had been observed. No such resonance is evident in this work. In all, the cross section is measured in 30 energy bins. …
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Photoproduction of Positive Pions From Hydrogen Near Threshold
Made available in DSpace on 2015-05-12T17:12:29Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6206118.PDF: 7253111 bytes, checksum: 9a3d8a33eec0d87fa07d92271904f6e6 (MD5) Previous issue date: 1962
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Photoproduction of positive pions near threshold in hydrogen
… of pi+ photoproduction cross sections very 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 …
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Photoproduction of charged pions from deuterium near threshold
… behavior of the pi-photoproduction cross section near threshold. To do this an X=ray beam from the University of Illinois betatron 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 …
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Synthesis constraint optimization for near-threshold voltage design
Near-threshold voltage (NTV) design is a viable solution to many embedded systems which require high energy efficiencies and low performances, but it makes them vulnerable to process variation. Increasing the size of devices and/or decreasing the operating frequencies of the systems can be the …
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Photoproduction of Positive Pions From Hydrogen and Deuterium Near Threshold
Made available in DSpace on 2015-05-12T17:12:03Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0018185.PDF: 4326996 bytes, checksum: 10cfb69fda97c1e2378b05f349d4f6c9 (MD5) Previous issue date: 1956
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Near threshold photofission and photoneutron emission in 238U and 232Th
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-22T18:50:05Z No. of bitstreams: 1 1975_dickey.pdf: 4910525 bytes, checksum: 63fc8c285fd14d8c77d0c886abc6a530 (MD5)
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A Monte Carlo method for simulation of [pi]° production near threshold
… a procedure for the simulation of π° production near threshold. A number of computer programs have been written to perform as well as test the simulation process. The method consists of generating the pion angles in the center of mass frame and subsequently its decay gammas in the lab frame of …
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Near Threshold Photofission and Photoneutron Emission in Uranium-238 and Thorium-232
Made available in DSpace on 2015-05-12T22:39:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7514101.PDF: 4736882 bytes, checksum: e13aa34e1a5720058177f12c8aa3041a (MD5) Previous issue date: 1975
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A measurement of proton anti-proton going to anti-lambda lambda baryon near threshold
… the reaction $\bar pp\to \bar\Lambda\Lambda$ at threshold has been completed. This work includes a thorough scan of the 2 MeV region where a hint of a cross section resonance had been observed. No such resonance is evident in this work. In all, the cross section is measured in 30 energy bins. …
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Hydrogen degradation and microstructural effects of the near-threshold fatigue resistance of pressure vessel steels
… of the structure. At low stress intensities near-threshold [delta]K₀ ([delta]K = Kmax - Kmin), water vapor in the environment was found to produce a pronounced effect on the fatigue resistance for partial pressures as low as 10 torr. In 2 1/4Cr-1%Mo SA378-2-22 steel the crack propagation …
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System-level optimization of the DC-DC voltage regulator and core for sub/near-threshold voltage operation
… for low power embedded systems operating in near/sub-threshold region due to its high conversion ratio and compactness. However, existing optimization for SC-VRM is separated from the embedded core design and therefore leads to sub-optimal system energy efficiency. In this thesis, we propose …
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The design of an intense accelerator-based epithermal neutron beam prototype for BNCT using near-threshold reactions
Near-threshold boron neutron capture therapy (BNCT) uses proton energies only tens of keV above the (p,n) reaction threshold in lithium in order to reduce the moderation requirements of the neutron source. The goals of this research were to prove the feasibility of this near-threshold concept for …
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Measurement of the total cross section for the π - 2π reaction p(π⁺, π⁺ π⁰)p near threshold
A feasibility study for measuring the total cross section of the π - 2π reaction, π⁺p → π⁺π⁰p, was performed at incident pion kinetic energies of 195 and 201 MeV. It was not possible to measure the total cross section with the present apparatus. Modifications and improvements to the present …
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Effect of strength, load ratio and environment on near-threshold fatigue crack propagation of 2 1/4 Cr - 1 Mo steel
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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