Electroproduction of the A isobar in C and Fe has been studied for incident electrons with energies between 0.6 and 1.6 GeV. A longitudinal-transverse decomposition of the inclusive cross section has been made for qj =0.1 (GeV/c) 2 . The residual longitudinal cross sections measured do not provide the additional strength needed above the quasifree region to satisfy the Coulomb sum rule. The transverse cross sections are in good agreement with data from photoabsorption.PACS numbers: 25.30.Fj Excitation of the A(3,3) resonance is the dominant feature of electromagnetic and hadronic interactions with nuclei in the region of energy transfer between pion threshold and 500 MeV. Because of strong interactions with other nucleons in the nuclear interior, one expects the A to be broadened and possibly shifted in energy when excited as a constituent nucleon in nuclear matter. The nuclear response in inelastic electron scattering has been studied 1 " 3 in the A region for energy transfers to the nucleus up to 550 MeV. To date, theoretical models for electron scattering have not given a satisfactory description of the data. 4 Although calculations which include nuclear-medium effects do predict a reduction of the peak cross section and a spreading of the A width, they do not account for the -34% enhancement in the integrated strength which O'Connell et al. 4 observe in the A region. It has been speculated that the origin of this enhancement may be a "quasideuteron electrodisintegration" mode of excitation 5,6 which is strongest in the region between the quasifree peak and the A peak in the nuclear response function.The experiment reported here extends high-energy (> 1.5 GeV) measurements to the medium-heavy nucleus, Fe, and includes for the first time a longitudinaltransverse decomposition of the inclusive cross section from pion threshold through the A region. Such a decomposition is vital to understanding the nuclear response to relatively large transfers of energy and momentum. The new data provide limits on the contributions of charge-dependent processes including the lond\ dndco ^M 1 9/f R L (q,(a) + qi + tan 2 -gitudinal tail of quasifree scattering into the A region. Because A excitation on the free nucleon results from a transverse yNA coupling, experimental sensitivity to A processes is increased in the transverse component of the inclusive cross section.The experiment was performed at the Stanford Linear Accelerator Laboratory with the NPAS (Nuclear Physics at SLAC) facility. Electron beams with energies of 653, 1300, 1500, and 1650 MeV were scattered from natural targets of C and Fe. Scattered electrons were observed in the 8-GeV/c spectrometer whose detector system includes a gas Cherenkov counter, ten planes of wire chambers, and a total-absorbing segmented leadglass shower detector array. The thicknesses of the carbon and iron targets were 324 and 122 mg/cm 2 , respectively. Observation of elastic scattering from a hydrogen target provided the absolute calibration of the spectrometer. Cross sections for the C ...

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The Response of BaF2 to protons, a particles and 0l6 ions with energies between 14 and 30 MeV/nucleon has been investigated using the Brookhaven National Laboratory AGS and the Lawrence Berkeley Laboratory 88" Cyclotron. Shape analysis of pulses from a fast photomultiplier tube shows a strong correlation of slow and fast integrated pulse components with particle type. Good separation among the particle species and good energy measurements are obtained, suggesting the suitability of BaF2 crystals as elements of energetic cosmic my detectors for spaceflight use.

An Analytical Measurements Information Database Application was developed to give an overall view of the criteria involved in the selection of an analytical measurement technique. This specific database application was developed for the measurement of elemental concentration of uranium. It includes information on many components of each measurement technique and allows easy comparison of different techniques. The integrated data information for the methods contained in this program include the specific technique, expected precision and bias, materials applicability, interferences, analysis time, reagents needed, training time, instrumentation required and its associated costs, and resulting process streams. Process stream information may be used to determine the method of preference based on pollution prevention opportunities. Use of this information also serves as an up-front indication of the types of waste generated when different analytical methods are implemented. Most sites, through pollution prevention programs and departmental mandates, are required to generate annual waste forecasts. The use of the process stream information greatly reduces the difficulty of predicting waste generation rates for different analytical methods, while the accuracy of such predictions is substantially increased. 14. SUBJECT TERMS 15. NUMBER OF PAGES Analytical Measurements Information Database Application, SERDP .35 16. PRICE CODE N/A 17. SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATION 19. SECURITY CLASSIFICATION 20. LIMITATION OF ABSTRACT OF REPORT OF THIS PAGE