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Prospects for future proton studies at HRIBF

 

作者: C. R. Bingham,   J. C. Batchelder,   T. N. Ginter,   C. J. Gross,   R. Grzywacz,   Z. Janas,   M. Karny,   J. W. McConnell,   K. Rykaczewski,   K. S. Toth,   E. F. Zganjar,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1900)
卷期: Volume 518, issue 1  

页码: 297-306

 

ISSN:0094-243X

 

年代: 1900

 

DOI:10.1063/1.1306024

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Great progress has been made in the last 20 years in the study of proton emission from unstable nuclei, but the prospects for additional strides in the next several years are bright. The present main limitations on the study of proton radioactivity are related to the inability to produce copious quantities of nuclides beyond the proton drip line, and the difficulty of measuring proton radioactivity of a mass-separated nucleus in the first few microseconds of its existence. At the Holifield Facility we will attack the second of these limitations by using new signal processing CAMAC modules DGF-4C. Digitizing of the preamplifier signals should enable the analysis of a proton decay occurring at times even less than 1 microsecond after an implant in a strip detector. In the same process, the threshold energy at which we can make measurements will be lowered. These two things will hopefully enable the measurement of lower-energy, but faster decays of isotopes in the100Snregion and below. For the latter region, the proton decays crucial for a rp-process scenario are of particular interest (e.g.69Brdecay). Secondly, for very short-lived species, we plan to make measurements (without residue separation) at points much closer to the target, thus reducing the flight time between the target and detector. As more intense radioactive beams become available, eg.56Ni,we will utilize these to produce more neutron-deficient nuclides by use of colder reactions than is possible with stable beams. In some cases where delayed proton emitters are present in the same isobaric chain, the use of the cold reactions with radioactive beams can provide purer samples of the isotope of interest, with a reduction in background from the delayed proton emitters in the same mass chain. ©2000 American Institute of Physics.

 

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