isomer production via fast fragmentation
Abstract
In radioactive ion beam experiments, beams containing isomers can be of interest in probing nuclear structure and informing astrophysical reaction rates. While the production of mixed in-flight ground state and isomer beams using nucleon transfer can be generally understood through distorted wave Born approximation methodology, low-spin isomer production via fast fragmentation is relatively unstudied. To attain a practical understanding of low-spin isomer production using fast fragmentation beams, a test case of 38K/38mK was studied at the National Superconducting Cyclotron Laboratory’s ReAccelerated Beam facility. Starting from lise++ predictions, the fragmentation momentum distribution was sampled to determine isomer production. In addition, the effects of the gas stopper gradient and charge breeding times were examined. In the case of 38K, isomer production peaks at ~57%. This maximum is observed just off the lise++ predicted optimum magnetic rigidity, with only small losses in beam intensity within a few percent of this optimum rigidity setting. Control of the isomer fraction was also achieved through the modification of charge breeding times. Furthermore, fast fragmentation appears to be a feasible method for production of low-spin isomeric beams, but additional study is necessary to better describe the mechanism involved.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1484824
- Alternate Identifier(s):
- OSTI ID: 1489582
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 12; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Chipps, K. A., Kozub, R. L., Sumithrarachchi, C., Ginter, T., Baumann, T., Lund, K., Lapierre, A., Villari, A., Montes, F., Jin, S., Schmidt, K., Ayoub, S., Pain, S. D., and Blankstein, D. K 38 isomer production via fast fragmentation. United States: N. p., 2018.
Web. doi:10.1103/PhysRevAccelBeams.21.121301.
Chipps, K. A., Kozub, R. L., Sumithrarachchi, C., Ginter, T., Baumann, T., Lund, K., Lapierre, A., Villari, A., Montes, F., Jin, S., Schmidt, K., Ayoub, S., Pain, S. D., & Blankstein, D. K 38 isomer production via fast fragmentation. United States. https://doi.org/10.1103/PhysRevAccelBeams.21.121301
Chipps, K. A., Kozub, R. L., Sumithrarachchi, C., Ginter, T., Baumann, T., Lund, K., Lapierre, A., Villari, A., Montes, F., Jin, S., Schmidt, K., Ayoub, S., Pain, S. D., and Blankstein, D. Thu .
"K 38 isomer production via fast fragmentation". United States. https://doi.org/10.1103/PhysRevAccelBeams.21.121301.
@article{osti_1484824,
title = {K 38 isomer production via fast fragmentation},
author = {Chipps, K. A. and Kozub, R. L. and Sumithrarachchi, C. and Ginter, T. and Baumann, T. and Lund, K. and Lapierre, A. and Villari, A. and Montes, F. and Jin, S. and Schmidt, K. and Ayoub, S. and Pain, S. D. and Blankstein, D.},
abstractNote = {In radioactive ion beam experiments, beams containing isomers can be of interest in probing nuclear structure and informing astrophysical reaction rates. While the production of mixed in-flight ground state and isomer beams using nucleon transfer can be generally understood through distorted wave Born approximation methodology, low-spin isomer production via fast fragmentation is relatively unstudied. To attain a practical understanding of low-spin isomer production using fast fragmentation beams, a test case of 38K/38mK was studied at the National Superconducting Cyclotron Laboratory’s ReAccelerated Beam facility. Starting from lise++ predictions, the fragmentation momentum distribution was sampled to determine isomer production. In addition, the effects of the gas stopper gradient and charge breeding times were examined. In the case of 38K, isomer production peaks at ~57%. This maximum is observed just off the lise++ predicted optimum magnetic rigidity, with only small losses in beam intensity within a few percent of this optimum rigidity setting. Control of the isomer fraction was also achieved through the modification of charge breeding times. Furthermore, fast fragmentation appears to be a feasible method for production of low-spin isomeric beams, but additional study is necessary to better describe the mechanism involved.},
doi = {10.1103/PhysRevAccelBeams.21.121301},
journal = {Physical Review Accelerators and Beams},
number = 12,
volume = 21,
place = {United States},
year = {Thu Dec 06 00:00:00 EST 2018},
month = {Thu Dec 06 00:00:00 EST 2018}
}
https://doi.org/10.1103/PhysRevAccelBeams.21.121301
Web of Science
Figures / Tables:
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Works referencing / citing this record:
Electron-beam ion source/trap charge breeders at rare-isotope beam facilities
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Figures / Tables found in this record: