In-flight production of an isomeric beam of 16N

C. R. Hoffman; T. L. Tang; M. Avila; Y. Ayyad; K. W. Brown; J. Chen; K. A. Chipps; H. Jayatissa; B. P. Kay; C. Müller-Gatermann; H. J. Ong; J. Song; G. L. Wilson

doi:10.1016/j.nima.2022.166612

In-flight production of an isomeric beam of ¹⁶N

C. R. Hoffman, T. L. Tang, M. Avila, Y. Ayyad, K. W. Brown, J. Chen, K. A. Chipps, H. Jayatissa, B. P. Kay, C. Müller-Gatermann, H. J. Ong, J. Song, G. L. Wilson

Nuclear Structure and Nuclear Astrophysi

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

6 Scopus citations

Abstract

An in-flight beam of ¹⁶N was produced via the single-neutron adding (d,p) reaction in inverse kinematics at the recently upgraded Argonne Tandem Linear Accelerator System (ATLAS) in-flight system. The amount of the ¹⁶N beam which resided in its excited 0.120 MeV J^π=0⁻ isomeric state (T_1/2≈5 μs) was determined to be 40(5)% at a reaction energy of 7.9(3) MeV/u, and 24(2)% at a reaction energy of 13.2(2) MeV/u. The isomer measurements took place at an experimental station ≈30 m downstream of the production target and utilized an Al beam-stopping foil and a HPGe Clover detector. Composite ¹⁶N beam rate determinations were made at the experimental station and the focal plane of the Argonne in-flight radioactive ion-beam separator (RAISOR) with Si ΔE-E telescopes. A Distorted Wave Born Approximation (DWBA) approach was coupled with the known spectroscopic information on ¹⁶N in order to estimate the relative ¹⁶N isomer yields and composite ¹⁶N beam rates. In addition to the observed reaction-energy dependence of the isomer fraction, a large sensitivity to the angular acceptance of the recoils was also observed.

Original language	English
Article number	166612
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1032
DOIs	https://doi.org/10.1016/j.nima.2022.166612
State	Published - Jun 1 2022

Funding

The authors would like to acknowledge the efforts of the ATLAS Facility’s operations team, P. Copp, B. Mustapha, and C. Dickerson towards this work. This research used resources of Argonne National Laboratory’s ATLAS facility, which is a Department of Energy Office of Science User Facility. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics , under Contract Nos. DE-AC02-06CH11357 (ANL), DE-AC05-00OR22725 (ORNL), DE-SC0020451 (NSCL), and Grant No. DE-FG02-96ER40978 (LSU) . This work was also supported by the Japanese Hirose International Scholarship Foundation .

Funders	Funder number
Japanese Hirose International Scholarship Foundation
NSCL	DE-FG02-96ER40978
U.S. Department of Energy
Office of Science
Nuclear Physics	DE-AC02-06CH11357
Argonne National Laboratory	DE-AC05-00OR22725
Oak Ridge National Laboratory	DE-SC0020451

Keywords

Isomeric beam
Nuclear reactions
RI beam production
Transfer reactions

Access to Document

10.1016/j.nima.2022.166612

Cite this

Hoffman, C. R., Tang, T. L., Avila, M., Ayyad, Y., Brown, K. W., Chen, J., Chipps, K. A., Jayatissa, H., Kay, B. P., Müller-Gatermann, C., Ong, H. J., Song, J., & Wilson, G. L. (2022). In-flight production of an isomeric beam of ¹⁶N. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1032, Article 166612. https://doi.org/10.1016/j.nima.2022.166612

@article{21e566ff275e40869bdcf79b72d53278,

title = "In-flight production of an isomeric beam of 16N",

abstract = "An in-flight beam of 16N was produced via the single-neutron adding (d,p) reaction in inverse kinematics at the recently upgraded Argonne Tandem Linear Accelerator System (ATLAS) in-flight system. The amount of the 16N beam which resided in its excited 0.120 MeV Jπ=0− isomeric state (T1/2≈5 μs) was determined to be 40(5)% at a reaction energy of 7.9(3) MeV/u, and 24(2)% at a reaction energy of 13.2(2) MeV/u. The isomer measurements took place at an experimental station ≈30 m downstream of the production target and utilized an Al beam-stopping foil and a HPGe Clover detector. Composite 16N beam rate determinations were made at the experimental station and the focal plane of the Argonne in-flight radioactive ion-beam separator (RAISOR) with Si ΔE-E telescopes. A Distorted Wave Born Approximation (DWBA) approach was coupled with the known spectroscopic information on 16N in order to estimate the relative 16N isomer yields and composite 16N beam rates. In addition to the observed reaction-energy dependence of the isomer fraction, a large sensitivity to the angular acceptance of the recoils was also observed.",

keywords = "Isomeric beam, Nuclear reactions, RI beam production, Transfer reactions",

author = "Hoffman, {C. R.} and Tang, {T. L.} and M. Avila and Y. Ayyad and Brown, {K. W.} and J. Chen and Chipps, {K. A.} and H. Jayatissa and Kay, {B. P.} and C. M{\"u}ller-Gatermann and Ong, {H. J.} and J. Song and Wilson, {G. L.}",

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year = "2022",

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doi = "10.1016/j.nima.2022.166612",

language = "English",

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Hoffman, CR, Tang, TL, Avila, M, Ayyad, Y, Brown, KW, Chen, J, Chipps, KA, Jayatissa, H, Kay, BP, Müller-Gatermann, C, Ong, HJ, Song, J & Wilson, GL 2022, 'In-flight production of an isomeric beam of ¹⁶N', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1032, 166612. https://doi.org/10.1016/j.nima.2022.166612

TY - JOUR

T1 - In-flight production of an isomeric beam of 16N

AU - Hoffman, C. R.

AU - Tang, T. L.

AU - Avila, M.

AU - Ayyad, Y.

AU - Brown, K. W.

AU - Chen, J.

AU - Chipps, K. A.

AU - Jayatissa, H.

AU - Kay, B. P.

AU - Müller-Gatermann, C.

AU - Ong, H. J.

AU - Song, J.

AU - Wilson, G. L.

PY - 2022/6/1

Y1 - 2022/6/1

N2 - An in-flight beam of 16N was produced via the single-neutron adding (d,p) reaction in inverse kinematics at the recently upgraded Argonne Tandem Linear Accelerator System (ATLAS) in-flight system. The amount of the 16N beam which resided in its excited 0.120 MeV Jπ=0− isomeric state (T1/2≈5 μs) was determined to be 40(5)% at a reaction energy of 7.9(3) MeV/u, and 24(2)% at a reaction energy of 13.2(2) MeV/u. The isomer measurements took place at an experimental station ≈30 m downstream of the production target and utilized an Al beam-stopping foil and a HPGe Clover detector. Composite 16N beam rate determinations were made at the experimental station and the focal plane of the Argonne in-flight radioactive ion-beam separator (RAISOR) with Si ΔE-E telescopes. A Distorted Wave Born Approximation (DWBA) approach was coupled with the known spectroscopic information on 16N in order to estimate the relative 16N isomer yields and composite 16N beam rates. In addition to the observed reaction-energy dependence of the isomer fraction, a large sensitivity to the angular acceptance of the recoils was also observed.

AB - An in-flight beam of 16N was produced via the single-neutron adding (d,p) reaction in inverse kinematics at the recently upgraded Argonne Tandem Linear Accelerator System (ATLAS) in-flight system. The amount of the 16N beam which resided in its excited 0.120 MeV Jπ=0− isomeric state (T1/2≈5 μs) was determined to be 40(5)% at a reaction energy of 7.9(3) MeV/u, and 24(2)% at a reaction energy of 13.2(2) MeV/u. The isomer measurements took place at an experimental station ≈30 m downstream of the production target and utilized an Al beam-stopping foil and a HPGe Clover detector. Composite 16N beam rate determinations were made at the experimental station and the focal plane of the Argonne in-flight radioactive ion-beam separator (RAISOR) with Si ΔE-E telescopes. A Distorted Wave Born Approximation (DWBA) approach was coupled with the known spectroscopic information on 16N in order to estimate the relative 16N isomer yields and composite 16N beam rates. In addition to the observed reaction-energy dependence of the isomer fraction, a large sensitivity to the angular acceptance of the recoils was also observed.

KW - Isomeric beam

KW - Nuclear reactions

KW - RI beam production

KW - Transfer reactions

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DO - 10.1016/j.nima.2022.166612

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AN - SCOPUS:85127494009

SN - 0168-9002

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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

M1 - 166612

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