The LLNL AMS facility

Conference · Wed May 01 00:00:00 EDT 1996

OSTI ID:238574

Roberts, M L; Bench, G S; Brown, T A ^[1]

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1. Lawrence Livermore National Lab., CA (United States). Center for Accelerator Mass Spectrometry; and others

The AMS facility at Lawrence Livermore National Laboratory (LLNL) routinely measures the isotopes {sup 3}H, {sup 7}Be, {sup 10}Be, {sup 14}C, {sup 26}Al, {sup 36}Cl, {sup 41}Ca, {sup 59,63}Ni, and {sup 129}I. During the past two years, over 30,000 research samples have been measured. Of these samples, approximately 30% were for {sup 14}C bioscience tracer studies, 45% were {sup 14}C samples for archaeology and the geosciences, and the other isotopes constitute the remaining 25%. During the past two years at LLNL, a significant amount of work has gone into the development of the Projectile X-ray AMS (PXAMS) technique. PXAMS uses induced characteristic x-rays to discriminate against competing atomic isobars. PXAMS has been most fully developed for {sup 63}Ni but shows promise for the measurement of several other long lived isotopes. During the past year LLNL has also conducted an {sup 129}I interlaboratory comparison exercise. Recent hardware changes at the LLNL AMS facility include the installation and testing of a new thermal emission ion source, a new multianode gas ionization detector for general AMS use, re-alignment of the vacuum tank of the first of the two magnets that make up the high energy spectrometer, and a new cryo-vacuum system for the AMS ion source. In addition, they have begun design studies and carried out tests for a new high-resolution injector and a new beamline for heavy element AMS.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 238574
• Report Number(s): UCRL-JC--123254; CONF-9605169--1; ON: DE96010425
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
43 PARTICLE ACCELERATORS
ACCELERATOR FACILITIES
ACCURACY
ALUMINIUM 26
BERYLLIUM 7
CALCIUM 41
CARBON 14
CHLORINE 36
IODINE 129
LAWRENCE LIVERMORE NATIONAL LABORATORY
MASS SPECTROMETERS
MASS SPECTROSCOPY
MODIFICATIONS
NICKEL 59
NICKEL 63
OPERATION
PERFORMANCE
RADIOISOTOPES
TANDEM ELECTROSTATIC ACCELERATORS
TRITIUM
USES
X RADIATION