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Title: The use of aluminum nitride to improve Aluminum-26 Accelerator Mass Spectrometry measurements and production of Radioactive Ion Beams

Abstract

We present results and discuss the use of aluminum nitride as a promising source material for Accelerator Mass Spectrometry (AMS) and Radioactive Ion Beams (RIBs) science applications of 26Al isotopes. The measurement of 26Al in geological samples by AMS is typically conducted on Al 2O 3 targets. However, Al 2O 3 is not an ideal source material because it does not form a prolific beam of Al- required for measuring low-levels of 26Al. Multiple samples of aluminum oxide (Al 2O 3), aluminum nitride (AlN), mixed Al 2O 3–AlN as well as aluminum fluoride (AlF 3) were tested and compared using the ion source test facility and the stable ion beam (SIB) injector platform at the 25-MV tandem electrostatic accelerator at Oak Ridge National Laboratory. Negative ion currents of atomic and molecular aluminum were examined for each source material. It was found that pure AlN targets produced substantially higher beam currents than the other materials and that there was some dependence on the exposure of AlN to air. The applicability of using AlN as a source material for geological samples was explored by preparing quartz samples as Al 2O 3 and converting them to AlN using a carbothermal reduction technique, whichmore » involved reducing the Al 2O 3 with graphite powder at 1600 °C within a nitrogen atmosphere. The quartz material was successfully converted to AlN. Thus far, AlN proves to be a promising source material and could lead towards increasing the sensitivity of low-level 26Al AMS measurements. The potential of using AlN as a source material for nuclear physics is also very promising by placing 26AlN directly into a source to produce more intense radioactive beams of 26Al.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. ORNL
  2. {nmn} [ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1462915
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Journal Name:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Additional Journal Information:
Journal Volume: 361; Journal Issue: 15 October 2015; Conference: International Conference on Accelerator Mass Spectrometry (AMS13) , Aix-en-Provence, France, 24-29 Aug 2014; Journal ID: ISSN 0168-583X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Janzen, Meghan S., Galindo-Uribarri, Alfredo, Liu, Yuan, Mills, Gerald D., Romero-Romero, Elisa, and Stracener, Daniel W. The use of aluminum nitride to improve Aluminum-26 Accelerator Mass Spectrometry measurements and production of Radioactive Ion Beams. United States: N. p., 2015. Web. doi:10.1016/j.nimb.2015.05.037.
Janzen, Meghan S., Galindo-Uribarri, Alfredo, Liu, Yuan, Mills, Gerald D., Romero-Romero, Elisa, & Stracener, Daniel W. The use of aluminum nitride to improve Aluminum-26 Accelerator Mass Spectrometry measurements and production of Radioactive Ion Beams. United States. doi:10.1016/j.nimb.2015.05.037.
Janzen, Meghan S., Galindo-Uribarri, Alfredo, Liu, Yuan, Mills, Gerald D., Romero-Romero, Elisa, and Stracener, Daniel W. Thu . "The use of aluminum nitride to improve Aluminum-26 Accelerator Mass Spectrometry measurements and production of Radioactive Ion Beams". United States. doi:10.1016/j.nimb.2015.05.037. https://www.osti.gov/servlets/purl/1462915.
@article{osti_1462915,
title = {The use of aluminum nitride to improve Aluminum-26 Accelerator Mass Spectrometry measurements and production of Radioactive Ion Beams},
author = {Janzen, Meghan S. and Galindo-Uribarri, Alfredo and Liu, Yuan and Mills, Gerald D. and Romero-Romero, Elisa and Stracener, Daniel W.},
abstractNote = {We present results and discuss the use of aluminum nitride as a promising source material for Accelerator Mass Spectrometry (AMS) and Radioactive Ion Beams (RIBs) science applications of 26Al isotopes. The measurement of 26Al in geological samples by AMS is typically conducted on Al2O3 targets. However, Al2O3 is not an ideal source material because it does not form a prolific beam of Al- required for measuring low-levels of 26Al. Multiple samples of aluminum oxide (Al2O3), aluminum nitride (AlN), mixed Al2O3–AlN as well as aluminum fluoride (AlF3) were tested and compared using the ion source test facility and the stable ion beam (SIB) injector platform at the 25-MV tandem electrostatic accelerator at Oak Ridge National Laboratory. Negative ion currents of atomic and molecular aluminum were examined for each source material. It was found that pure AlN targets produced substantially higher beam currents than the other materials and that there was some dependence on the exposure of AlN to air. The applicability of using AlN as a source material for geological samples was explored by preparing quartz samples as Al2O3 and converting them to AlN using a carbothermal reduction technique, which involved reducing the Al2O3 with graphite powder at 1600 °C within a nitrogen atmosphere. The quartz material was successfully converted to AlN. Thus far, AlN proves to be a promising source material and could lead towards increasing the sensitivity of low-level 26Al AMS measurements. The potential of using AlN as a source material for nuclear physics is also very promising by placing 26AlN directly into a source to produce more intense radioactive beams of 26Al.},
doi = {10.1016/j.nimb.2015.05.037},
journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms},
issn = {0168-583X},
number = 15 October 2015,
volume = 361,
place = {United States},
year = {2015},
month = {10}
}

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