High-sensitivity detection of 244Pu via electron-cyclotron resonance ionization and linear acceleration

M. Paul; R. Pardo; I. Ahmad; J. Greene; D. Henderson; R. V.F. Janssens; C. L. Jiang; K. E. Rehm; R. Scott; D. Seweryniak; R. Vondrasek

doi:10.1016/j.nimb.2012.01.016

High-sensitivity detection of ²⁴⁴Pu via electron-cyclotron resonance ionization and linear acceleration

M. Paul^*
, R. Pardo
, I. Ahmad
, J. Greene
, D. Henderson
, R. V.F. Janssens
, C. L. Jiang
, K. E. Rehm
, R. Scott
, D. Seweryniak
, R. Vondrasek

^*Corresponding author for this work

Racah Institute of Physics

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

4 Scopus citations

Abstract

The r-process nuclide ²⁴⁴Pu (t_1/2 = 80.8 Myr) was extant in the Early Solar System and is presently considered as extinct. However, fresh ²⁴⁴Pu produced in the Galaxy, may reach the Solar System and Earth through influx of interstellar dust or as direct ejecta from supernovae. Detection of such traces requires high sensitivity, discrimination power and efficiency. Accelerator mass spectrometry (AMS), despite low efficiency, is the method of choice. We report on the successful detection of ²⁴⁴Pu by AMS, using highly-charged positive ions produced in an Electron Cyclotron Resonance (ECR) ion source and accelerated with the superconducting heavy-ion linear accelerator ATLAS at Argonne National Laboratory. ²⁴⁴Pu^34+,35+,36+ ions with a final energy of 0.7 MeV/u were dispersed in m/q using the Argonne Fragment Mass Analyzer (FMA) and are well discriminated from parasitic ions. A count rate of 0.7 ²⁴⁴Pu counts/min was observed for a sample containing 2.7 × 10⁸ ²⁴⁴Pu atoms/mg. The technique described here is presently used, with improved setup and accelerator conditions, for the measurement of neutron capture cross sections in the actinide region.

Original language	English
Pages (from-to)	165-167
Number of pages	3
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	294
DOIs	https://doi.org/10.1016/j.nimb.2012.01.016
State	Published - Jan 2013

Keywords

Accelerator mass spectrometry
Actinides
Electron cyclotron resonance ion source
Linear accelerator

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10.1016/j.nimb.2012.01.016

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Paul, M., Pardo, R., Ahmad, I., Greene, J., Henderson, D., Janssens, R. V. F., Jiang, C. L., Rehm, K. E., Scott, R., Seweryniak, D., & Vondrasek, R. (2013). High-sensitivity detection of ²⁴⁴Pu via electron-cyclotron resonance ionization and linear acceleration. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 294, 165-167. https://doi.org/10.1016/j.nimb.2012.01.016

@article{c4d461b17fcf4840833e34817cc5a9dc,

title = "High-sensitivity detection of 244Pu via electron-cyclotron resonance ionization and linear acceleration",

abstract = "The r-process nuclide 244Pu (t1/2 = 80.8 Myr) was extant in the Early Solar System and is presently considered as extinct. However, fresh 244Pu produced in the Galaxy, may reach the Solar System and Earth through influx of interstellar dust or as direct ejecta from supernovae. Detection of such traces requires high sensitivity, discrimination power and efficiency. Accelerator mass spectrometry (AMS), despite low efficiency, is the method of choice. We report on the successful detection of 244Pu by AMS, using highly-charged positive ions produced in an Electron Cyclotron Resonance (ECR) ion source and accelerated with the superconducting heavy-ion linear accelerator ATLAS at Argonne National Laboratory. 244Pu34+,35+,36+ ions with a final energy of 0.7 MeV/u were dispersed in m/q using the Argonne Fragment Mass Analyzer (FMA) and are well discriminated from parasitic ions. A count rate of 0.7 244Pu counts/min was observed for a sample containing 2.7 {\texttimes} 108 244Pu atoms/mg. The technique described here is presently used, with improved setup and accelerator conditions, for the measurement of neutron capture cross sections in the actinide region.",

keywords = "Accelerator mass spectrometry, Actinides, Electron cyclotron resonance ion source, Linear accelerator",

author = "M. Paul and R. Pardo and I. Ahmad and J. Greene and D. Henderson and Janssens, \{R. V.F.\} and Jiang, \{C. L.\} and Rehm, \{K. E.\} and R. Scott and D. Seweryniak and R. Vondrasek",

year = "2013",

month = jan,

doi = "10.1016/j.nimb.2012.01.016",

language = "אנגלית",

volume = "294",

pages = "165--167",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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publisher = "Elsevier B.V.",

}

Paul, M, Pardo, R, Ahmad, I, Greene, J, Henderson, D, Janssens, RVF, Jiang, CL, Rehm, KE, Scott, R, Seweryniak, D & Vondrasek, R 2013, 'High-sensitivity detection of ²⁴⁴Pu via electron-cyclotron resonance ionization and linear acceleration', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 294, pp. 165-167. https://doi.org/10.1016/j.nimb.2012.01.016

TY - JOUR

T1 - High-sensitivity detection of 244Pu via electron-cyclotron resonance ionization and linear acceleration

AU - Paul, M.

AU - Pardo, R.

AU - Ahmad, I.

AU - Greene, J.

AU - Henderson, D.

AU - Janssens, R. V.F.

AU - Jiang, C. L.

AU - Rehm, K. E.

AU - Scott, R.

AU - Seweryniak, D.

AU - Vondrasek, R.

PY - 2013/1

Y1 - 2013/1

N2 - The r-process nuclide 244Pu (t1/2 = 80.8 Myr) was extant in the Early Solar System and is presently considered as extinct. However, fresh 244Pu produced in the Galaxy, may reach the Solar System and Earth through influx of interstellar dust or as direct ejecta from supernovae. Detection of such traces requires high sensitivity, discrimination power and efficiency. Accelerator mass spectrometry (AMS), despite low efficiency, is the method of choice. We report on the successful detection of 244Pu by AMS, using highly-charged positive ions produced in an Electron Cyclotron Resonance (ECR) ion source and accelerated with the superconducting heavy-ion linear accelerator ATLAS at Argonne National Laboratory. 244Pu34+,35+,36+ ions with a final energy of 0.7 MeV/u were dispersed in m/q using the Argonne Fragment Mass Analyzer (FMA) and are well discriminated from parasitic ions. A count rate of 0.7 244Pu counts/min was observed for a sample containing 2.7 × 108 244Pu atoms/mg. The technique described here is presently used, with improved setup and accelerator conditions, for the measurement of neutron capture cross sections in the actinide region.

AB - The r-process nuclide 244Pu (t1/2 = 80.8 Myr) was extant in the Early Solar System and is presently considered as extinct. However, fresh 244Pu produced in the Galaxy, may reach the Solar System and Earth through influx of interstellar dust or as direct ejecta from supernovae. Detection of such traces requires high sensitivity, discrimination power and efficiency. Accelerator mass spectrometry (AMS), despite low efficiency, is the method of choice. We report on the successful detection of 244Pu by AMS, using highly-charged positive ions produced in an Electron Cyclotron Resonance (ECR) ion source and accelerated with the superconducting heavy-ion linear accelerator ATLAS at Argonne National Laboratory. 244Pu34+,35+,36+ ions with a final energy of 0.7 MeV/u were dispersed in m/q using the Argonne Fragment Mass Analyzer (FMA) and are well discriminated from parasitic ions. A count rate of 0.7 244Pu counts/min was observed for a sample containing 2.7 × 108 244Pu atoms/mg. The technique described here is presently used, with improved setup and accelerator conditions, for the measurement of neutron capture cross sections in the actinide region.

KW - Accelerator mass spectrometry

KW - Actinides

KW - Electron cyclotron resonance ion source

KW - Linear accelerator

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JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

ER -

High-sensitivity detection of ²⁴⁴Pu via electron-cyclotron resonance ionization and linear acceleration

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