Download or read book Compton Suppression Tests on Ge and BGO Prototype Detectors for Gammasphere written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade the application of arrays of 10--30 Compton Suppressed germanium (CSG) detectors in the field of [gamma]-ray spectroscopy has led to a number of significant advances in studies of nuclear structure. Despite the success of these instruments, most of them are limited to detecting two-fold (and in a few cases three-fold) coincidences from highmultiplicity cascades. To increase the detection sensitivity for weak cascades, proposals have recently emerged for construction of much larger arrays. In the USA, the proposed array, called GAMMASPHERE, is to have 110 large CSG detectors which will subtend a solid angle of almost 2[pi] steradians, sufficient to permit routine acquisition of up to 5-fold coincidences from high-multiplicity cascades. This together with other improvements, will yield a resolving power several orders of magnitude greater than currents arrays. In Europe, an array of similar size and power, called EUROGAM, is currently being constructed. In this paper, we report on measurements of the Compton suppression and overall P/T ratio of two Ge detectors in a BGO shield of the honeycomb pattern. These were the first prototype CSG detector assemblies for GAMMASPHERE.
Download or read book Testing of the BGO Compton suppression Detectors for Gammasphere written by and published by . This book was released on 1995 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gammasphere, the national [gamma]-ray facility, when completed will consist of 110 Compton-suppressed Ge detectors. The bismuth germanate (BGO) Compton-suppression detector system for each Ge detector consists of one tapered hexagonal BGO side shield and one slotted BGO back plug. Due to the geometry of the array, three types of annular shields are required. These types are referred to as B, C and D, and the array consists of 60, 30 and 20 of these units, respectively. Shield types B, C and D have a hexagonal geometry. They are divided into six optically separate sections, each with its own pair of photomultiplier tubes. Argonne assumed responsibility for the procurement and testing of the BGO Compton-suppression units. We received all detectors from the two vendors. In the past year, twenty-four of the B-type detectors were delivered to Stony Brook for evaluation tests. Since the number of crystals to test is quite large (six per detector), we involved undergraduate students working at ANL under the Department of Educational Programs (DEP) in this effort. The quality of students was excellent, and they played a major role in the performance testing of these detectors. Ninety-nine of the hexagonal side shields and 112 backplug detectors were shipped to LBL for use in Gammasphere. The remaining detectors did not meet the performance criteria when they were first delivered and tested and are either at the vendor being repaired or were returned to us for retesting. We anticipate that the remaining detectors will be ready for use in Gammasphere within the next few months.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-08 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Test and Performance of a BGO Compton suppression Shield for Gammasphere written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Data written by and published by . This book was released on 1993 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science Abstracts written by and published by . This book was released on 1992 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compton suppressed spectrometers thoughts and calculations pertinent to the design of bgo shielded ge detectors for the 8 pi spectrometer written by E. Hagberg and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Advances In Nuclear Structure written by Bucurescu D and published by World Scientific. This book was released on 1991-04-30 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The invited lectures of the 1990 Predeal summer school cover some of the main achievements and perspectives in the field of the nuclear structure, from both the experimental and theoretical points of view. Among the main subjects are: reaching the nuclei far from stability, and the study of their structure and decay modes; properties of the nuclei at high spins and the physics of superdeformed nuclei; refined nuclear spectroscopy measurements; new developments in theoretical nuclear structure models; heavy fragment radioactivities.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Division Annual Report written by Argonne National Laboratory. Physics Division and published by . This book was released on 1996 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2004 IEEE Nuclear Science Symposium Conference Record written by and published by . This book was released on 2004 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Performance of a Single crystal BGO Annulus as a Compton Suppression Detector written by and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have tested a single-crystal bismuth-germanate annulus in conjunction with a high-purity germanium detector as a Compton-suppression spectrometer, and have measured gamma-ray energies of up to 6.13 MeV. 1 ref., 9 figs., 2 tabs.
Download or read book New Nuclear Physics With Advanced Techniques Proceedings Of The International Conference written by Stathis Kossionides and published by World Scientific. This book was released on 1992-03-24 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings contain invited papers and contributions which capture the recent advances in technology (beams, detectors, electronics, computing) and emphasize the new frontiers opened up in Nuclear Physics. Results with most of the existing multidetectors, as well as the progress of new developments, were presented. The presentations of EUROGAM, GAMMASPHERE, GASP, DIAMANT, ORION, EDEN, DEMON, the Texas Neutron Ball, the DWARF Ball, INDRA, FOBOS, AMPHORA, MEDEA and the SIS/ESR Particle Ball will also be included. The progress in data collection with the new integrated electronics, as well as transputer farm and network distributed processing, is also presented. Experimental results cover superdeformation, multifragmentation, neutron-rich isotopes, dissipative collisions, cluster states and radioactive beam measurements.
Download or read book Compton Rejection for HPGe Detectors Via Real time Pulse Shape Analysis written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A Lawrence Livermore National Laboratory-developed pulse shape analysis (PSA) technique which performs real-time Compton suppression in High Purity Germanium (HPGe) detectors without the use of anti-coincidence detectors is described. Some preliminary measurements of a variety of sources with a standard HPGe detector system and our prototype PSA algorithm have been made and indicate that a reduction in Compton continuum can be achieved via PSA. These measurements represent an initial assessment of the effectiveness of the prototype PSA system for the improvement of spectral quality and future improvements are expected. Additional work is progressing to optimize the effectiveness of the algorithm for Compton rejection in standard HPGe detectors. Work is also progressing to extend the methodology to segmented HPGe detectors which could potentially yield significantly better Compton rejection and gamma-ray ima.
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
