Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator

K. Y. Chae; S. Ahn; A. Ayres; D. W. Bardayan; A. Bey; U. Greife; M. E. Howard; K. L. Jones; R. L. Kozub; M. Matoš; B. H. Moazen; C. D. Nesaraja; P. D. O'Malley; W. A. Peters; S. T. Pittman; M. S. Smith

doi:10.1016/j.nima.2018.05.053

Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator

K. Y. Chae, S. Ahn, A. Ayres, D. W. Bardayan, A. Bey, U. Greife, M. E. Howard, K. L. Jones, R. L. Kozub, M. Matoš, B. H. Moazen, C. D. Nesaraja, P. D. O'Malley, W. A. Peters, S. T. Pittman, M. S. Smith

Nuclear Structure and Nuclear Astrophysi

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

Abstract

Direct measurements of (α,p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of helium targets and the typical low intensities of the beams. To address this, a new technique has been developed for measurements of low-energy (α,p) reactions with heavy ion beams using an extended ⁴He gas target and a newly developed gas recirculating system. The system was used to measure the ⁴He(¹⁹F, ¹H)²²Ne reaction as a demonstration. Excitation functions of the ¹⁹F(α,p)²²Ne and ¹⁹F(α,p^′)²²Ne^∗ reactions were successfully measured to show the viability of this technique. Details of the approach and future plans are given.

Original language	English
Pages (from-to)	60-63
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	900
DOIs	https://doi.org/10.1016/j.nima.2018.05.053
State	Published - Aug 21 2018

Funding

The authors wish to thank the staff members of the HRIBF for making this work possible. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. NRF-2015R1D1A1A01056918 , NRF-2016K1A3A7A09005579 , and NRF-2016R1A5A1013277 ) and the US Department of Energy under Contract Nos. DE-AC05-00OR22725 (ORNL) , DE-FG02-96ER40983 and DE-SC0001174 (University of Tennessee). This work was also supported by LG Yonam Foundation (of Korea) .

Funders	Funder number
LG Yonam Foundation
NRF-2016R1A5A1013277
US Department of Energy
National Science Foundation	1713857
National Research Foundation of Korea
Ministry of Education, Science and Technology	NRF-2016K1A3A7A09005579, NRF-2015R1D1A1A01056918

Keywords

Extended gas target
F(α,p)Ne reaction
Heavy ion beam
Inverse kinematics
αp-process

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10.1016/j.nima.2018.05.053

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Chae, K. Y., Ahn, S., Ayres, A., Bardayan, D. W., Bey, A., Greife, U., Howard, M. E., Jones, K. L., Kozub, R. L., Matoš, M., Moazen, B. H., Nesaraja, C. D., O'Malley, P. D., Peters, W. A., Pittman, S. T., & Smith, M. S. (2018). Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 900, 60-63. https://doi.org/10.1016/j.nima.2018.05.053

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title = "Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator",

abstract = "Direct measurements of (α,p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of helium targets and the typical low intensities of the beams. To address this, a new technique has been developed for measurements of low-energy (α,p) reactions with heavy ion beams using an extended 4He gas target and a newly developed gas recirculating system. The system was used to measure the 4He(19F, 1H)22Ne reaction as a demonstration. Excitation functions of the 19F(α,p)22Ne and 19F(α,p′)22Ne∗ reactions were successfully measured to show the viability of this technique. Details of the approach and future plans are given.",

keywords = "Extended gas target, F(α,p)Ne reaction, Heavy ion beam, Inverse kinematics, αp-process",

author = "Chae, {K. Y.} and S. Ahn and A. Ayres and Bardayan, {D. W.} and A. Bey and U. Greife and Howard, {M. E.} and Jones, {K. L.} and Kozub, {R. L.} and M. Mato{\v s} and Moazen, {B. H.} and Nesaraja, {C. D.} and O'Malley, {P. D.} and Peters, {W. A.} and Pittman, {S. T.} and Smith, {M. S.}",

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year = "2018",

month = aug,

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doi = "10.1016/j.nima.2018.05.053",

language = "English",

volume = "900",

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Chae, KY, Ahn, S, Ayres, A, Bardayan, DW, Bey, A, Greife, U, Howard, ME, Jones, KL, Kozub, RL, Matoš, M, Moazen, BH, Nesaraja, CD, O'Malley, PD, Peters, WA, Pittman, ST & Smith, MS 2018, 'Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 900, pp. 60-63. https://doi.org/10.1016/j.nima.2018.05.053

Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator. / Chae, K. Y.; Ahn, S.; Ayres, A. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 900, 21.08.2018, p. 60-63.

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

TY - JOUR

T1 - Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator

AU - Chae, K. Y.

AU - Ahn, S.

AU - Ayres, A.

AU - Bardayan, D. W.

AU - Bey, A.

AU - Greife, U.

AU - Howard, M. E.

AU - Jones, K. L.

AU - Kozub, R. L.

AU - Matoš, M.

AU - Moazen, B. H.

AU - Nesaraja, C. D.

AU - O'Malley, P. D.

AU - Peters, W. A.

AU - Pittman, S. T.

AU - Smith, M. S.

PY - 2018/8/21

Y1 - 2018/8/21

N2 - Direct measurements of (α,p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of helium targets and the typical low intensities of the beams. To address this, a new technique has been developed for measurements of low-energy (α,p) reactions with heavy ion beams using an extended 4He gas target and a newly developed gas recirculating system. The system was used to measure the 4He(19F, 1H)22Ne reaction as a demonstration. Excitation functions of the 19F(α,p)22Ne and 19F(α,p′)22Ne∗ reactions were successfully measured to show the viability of this technique. Details of the approach and future plans are given.

AB - Direct measurements of (α,p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of helium targets and the typical low intensities of the beams. To address this, a new technique has been developed for measurements of low-energy (α,p) reactions with heavy ion beams using an extended 4He gas target and a newly developed gas recirculating system. The system was used to measure the 4He(19F, 1H)22Ne reaction as a demonstration. Excitation functions of the 19F(α,p)22Ne and 19F(α,p′)22Ne∗ reactions were successfully measured to show the viability of this technique. Details of the approach and future plans are given.

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KW - F(α,p)Ne reaction

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JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Measuring low-energy (α,p) reaction cross sections using an extended gas target and gas recirculator

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