Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science

A. Galindo-Uribarri; C. C. Havener; T. L. Lewis; Y. Liu

doi:10.1016/j.nimb.2009.10.043

Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science

A. Galindo-Uribarri, C. C. Havener, T. L. Lewis, Y. Liu

Neutrino Research

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A new method of selective isobar suppression by photodetachment in a radio-frequency quadrupole ion cooler is being developed at HRIBF with a twofold purpose: (1) increasing the AMS sensitivity for certain isotopes of interest and (2) purifying radioactive ion beams for nuclear science. The potential of suppressing the ³⁶S contaminants in a ³⁶Cl beam using this method has been explored with stable S^- and Cl^- ions and a Nd:YLF laser. In the study, the laser beam was directed along the experiment's beam line and through a RF quadrupole ion cooler. Negative ³²S and ³⁵Cl ions produced by a Cs sputter ion source were focused into the ion cooler where they were slowed by collisions with He buffer gas; this increased the interaction time between the negative-ion beam and the laser beam. As a result, suppression of S^- by a factor of 3000 was obtained with about 2.5 W average laser power in the cooler while no reduction in Cl^- current was observed.

Original language	English
Pages (from-to)	834-838
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	268
Issue number	7-8
DOIs	https://doi.org/10.1016/j.nimb.2009.10.043
State	Published - Apr 2010

Funding

This work was supported by Oak Ridge National Laboratory managed by UT-Battelle, LLC, for the US DOE under Contract No. DE-AC05-00OR22725 ; and by PAPIIT IN121209.

Keywords

Isobar suppression
Photodetachment
RF quadrupole ion guide

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10.1016/j.nimb.2009.10.043

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title = "Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science",

abstract = "A new method of selective isobar suppression by photodetachment in a radio-frequency quadrupole ion cooler is being developed at HRIBF with a twofold purpose: (1) increasing the AMS sensitivity for certain isotopes of interest and (2) purifying radioactive ion beams for nuclear science. The potential of suppressing the 36S contaminants in a 36Cl beam using this method has been explored with stable S- and Cl- ions and a Nd:YLF laser. In the study, the laser beam was directed along the experiment's beam line and through a RF quadrupole ion cooler. Negative 32S and 35Cl ions produced by a Cs sputter ion source were focused into the ion cooler where they were slowed by collisions with He buffer gas; this increased the interaction time between the negative-ion beam and the laser beam. As a result, suppression of S- by a factor of 3000 was obtained with about 2.5 W average laser power in the cooler while no reduction in Cl- current was observed.",

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author = "A. Galindo-Uribarri and Havener, {C. C.} and Lewis, {T. L.} and Y. Liu",

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pages = "834--838",

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Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science. / Galindo-Uribarri, A.; Havener, C. C.; Lewis, T. L. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 268, No. 7-8, 04.2010, p. 834-838.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science

AU - Galindo-Uribarri, A.

AU - Havener, C. C.

AU - Lewis, T. L.

AU - Liu, Y.

PY - 2010/4

Y1 - 2010/4

N2 - A new method of selective isobar suppression by photodetachment in a radio-frequency quadrupole ion cooler is being developed at HRIBF with a twofold purpose: (1) increasing the AMS sensitivity for certain isotopes of interest and (2) purifying radioactive ion beams for nuclear science. The potential of suppressing the 36S contaminants in a 36Cl beam using this method has been explored with stable S- and Cl- ions and a Nd:YLF laser. In the study, the laser beam was directed along the experiment's beam line and through a RF quadrupole ion cooler. Negative 32S and 35Cl ions produced by a Cs sputter ion source were focused into the ion cooler where they were slowed by collisions with He buffer gas; this increased the interaction time between the negative-ion beam and the laser beam. As a result, suppression of S- by a factor of 3000 was obtained with about 2.5 W average laser power in the cooler while no reduction in Cl- current was observed.

AB - A new method of selective isobar suppression by photodetachment in a radio-frequency quadrupole ion cooler is being developed at HRIBF with a twofold purpose: (1) increasing the AMS sensitivity for certain isotopes of interest and (2) purifying radioactive ion beams for nuclear science. The potential of suppressing the 36S contaminants in a 36Cl beam using this method has been explored with stable S- and Cl- ions and a Nd:YLF laser. In the study, the laser beam was directed along the experiment's beam line and through a RF quadrupole ion cooler. Negative 32S and 35Cl ions produced by a Cs sputter ion source were focused into the ion cooler where they were slowed by collisions with He buffer gas; this increased the interaction time between the negative-ion beam and the laser beam. As a result, suppression of S- by a factor of 3000 was obtained with about 2.5 W average laser power in the cooler while no reduction in Cl- current was observed.

KW - Isobar suppression

KW - Photodetachment

KW - RF quadrupole ion guide

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IS - 7-8

ER -

Selective isobar suppression for accelerator mass spectrometry and radioactive ion-beam science

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Keywords

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