Improvements to the on-line mass separator, RAMA

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:386984

Ognibene, T J; Moltz, D M; Batchelder, J C ^[1]

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1. Lawrence Berkeley Laboratory, CA (United States); and others

Research on proton-rich nuclei far from the line of beta stability is experimentally difficult. One must ascertain the decay properties of these short-lived nuclei from a background of simultaneously and copiously produced radioactive nuclei closer to stability. One method to physically extract the radioactive nuclide of interest from this intense background is through the utilization of an on-line mass separator. We have recently completed changes to the He-jet coupled recoil mass separator RAMA (Recoil Atom Mass Analyzer) system at the 88 Inch Cyclotron at LBL Previous RAMA experiments have been hampered by the relatively long transit time ({ge} 180 ms) between the production of the nucleus of interest and its subsequent ionization. The present upgrade involves moving the ion source region from the cave roof down to our experimental cave, {approximately}20 cm from the target chamber. The resulting shorter capillary will reduce the transit time to {approximately}15 ms, essentially eliminating transit losses due to radioactive beta decay. These improvements as well as the implications for experiments will be discussed.

• OSTI ID: 386984
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM SEPARATORS
ION SOURCES
LBL 88-INCH CYCLOTRON
MODIFICATIONS