First direct mass measurement of the neutron-deficient nucleus Al 24

U. Chowdhury; K. G. Leach; C. Andreoiu; A. Bader; M. Brodeur; A. Chaudhuri; A. T. Gallant; A. Grossheim; G. Gwinner; R. Klawitter; A. A. Kwiatkowski; A. Lennarz; T. D. Macdonald; J. Pearkes; B. E. Schultz; J. Dilling

doi:10.1103/PhysRevC.92.045803

First direct mass measurement of the neutron-deficient nucleus Al 24

U. Chowdhury, K. G. Leach, C. Andreoiu, A. Bader, M. Brodeur, A. Chaudhuri, A. T. Gallant, A. Grossheim, G. Gwinner, R. Klawitter, A. A. Kwiatkowski, A. Lennarz, T. D. Macdonald, J. Pearkes, B. E. Schultz, J. Dilling

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Abstract

The first direct mass measurement of the neutron-deficient nucleus Al24 was performed via Penning-Trap Mass Spectrometry (PTMS) using TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This measurement was facilitated by the use of TRIUMF's new Ion-Guide Laser Ion Source (IG-LIS), which reduced A=24 isobaric contamination in the delivered beam by nearly six orders of magnitude. The measured mass excess was found to be Δ=-48.86(23) keV, which is five times more precise than the value quoted in the most recent atomic mass evaluation. When combined with the relevant Al24 excitation energy, and a recent measurement of the Mg23 mass, the astrophysical Mg23(p,γ)24Al reaction resonance energy is extracted as Er=480.8(14) keV. The presented value shows a 2σ disagreement with the direct measurement of this quantity by the DRAGON recoil spectrometer.

Original language	English
Article number	045803
Journal	Physical Review C - Nuclear Physics
Volume	92
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.92.045803
State	Published - Oct 13 2015
Externally published	Yes

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Chowdhury, U., Leach, K. G., Andreoiu, C., Bader, A., Brodeur, M., Chaudhuri, A., Gallant, A. T., Grossheim, A., Gwinner, G., Klawitter, R., Kwiatkowski, A. A., Lennarz, A., Macdonald, T. D., Pearkes, J., Schultz, B. E., & Dilling, J. (2015). First direct mass measurement of the neutron-deficient nucleus Al 24. Physical Review C - Nuclear Physics, 92(4), Article 045803. https://doi.org/10.1103/PhysRevC.92.045803

@article{a31dbc36ebf04eeb8c47e765fd21a803,

title = "First direct mass measurement of the neutron-deficient nucleus Al 24",

abstract = "The first direct mass measurement of the neutron-deficient nucleus Al24 was performed via Penning-Trap Mass Spectrometry (PTMS) using TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This measurement was facilitated by the use of TRIUMF's new Ion-Guide Laser Ion Source (IG-LIS), which reduced A=24 isobaric contamination in the delivered beam by nearly six orders of magnitude. The measured mass excess was found to be Δ=-48.86(23) keV, which is five times more precise than the value quoted in the most recent atomic mass evaluation. When combined with the relevant Al24 excitation energy, and a recent measurement of the Mg23 mass, the astrophysical Mg23(p,γ)24Al reaction resonance energy is extracted as Er=480.8(14) keV. The presented value shows a 2σ disagreement with the direct measurement of this quantity by the DRAGON recoil spectrometer.",

author = "U. Chowdhury and Leach, {K. G.} and C. Andreoiu and A. Bader and M. Brodeur and A. Chaudhuri and Gallant, {A. T.} and A. Grossheim and G. Gwinner and R. Klawitter and Kwiatkowski, {A. A.} and A. Lennarz and Macdonald, {T. D.} and J. Pearkes and Schultz, {B. E.} and J. Dilling",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

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doi = "10.1103/PhysRevC.92.045803",

language = "English",

volume = "92",

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Chowdhury, U, Leach, KG, Andreoiu, C, Bader, A, Brodeur, M, Chaudhuri, A, Gallant, AT, Grossheim, A, Gwinner, G, Klawitter, R, Kwiatkowski, AA, Lennarz, A, Macdonald, TD, Pearkes, J, Schultz, BE & Dilling, J 2015, 'First direct mass measurement of the neutron-deficient nucleus Al 24', Physical Review C - Nuclear Physics, vol. 92, no. 4, 045803. https://doi.org/10.1103/PhysRevC.92.045803

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T1 - First direct mass measurement of the neutron-deficient nucleus Al 24

AU - Chowdhury, U.

AU - Leach, K. G.

AU - Andreoiu, C.

AU - Bader, A.

AU - Brodeur, M.

AU - Chaudhuri, A.

AU - Gallant, A. T.

AU - Grossheim, A.

AU - Gwinner, G.

AU - Klawitter, R.

AU - Kwiatkowski, A. A.

AU - Lennarz, A.

AU - Macdonald, T. D.

AU - Pearkes, J.

AU - Schultz, B. E.

AU - Dilling, J.

PY - 2015/10/13

Y1 - 2015/10/13

N2 - The first direct mass measurement of the neutron-deficient nucleus Al24 was performed via Penning-Trap Mass Spectrometry (PTMS) using TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This measurement was facilitated by the use of TRIUMF's new Ion-Guide Laser Ion Source (IG-LIS), which reduced A=24 isobaric contamination in the delivered beam by nearly six orders of magnitude. The measured mass excess was found to be Δ=-48.86(23) keV, which is five times more precise than the value quoted in the most recent atomic mass evaluation. When combined with the relevant Al24 excitation energy, and a recent measurement of the Mg23 mass, the astrophysical Mg23(p,γ)24Al reaction resonance energy is extracted as Er=480.8(14) keV. The presented value shows a 2σ disagreement with the direct measurement of this quantity by the DRAGON recoil spectrometer.

AB - The first direct mass measurement of the neutron-deficient nucleus Al24 was performed via Penning-Trap Mass Spectrometry (PTMS) using TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This measurement was facilitated by the use of TRIUMF's new Ion-Guide Laser Ion Source (IG-LIS), which reduced A=24 isobaric contamination in the delivered beam by nearly six orders of magnitude. The measured mass excess was found to be Δ=-48.86(23) keV, which is five times more precise than the value quoted in the most recent atomic mass evaluation. When combined with the relevant Al24 excitation energy, and a recent measurement of the Mg23 mass, the astrophysical Mg23(p,γ)24Al reaction resonance energy is extracted as Er=480.8(14) keV. The presented value shows a 2σ disagreement with the direct measurement of this quantity by the DRAGON recoil spectrometer.

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First direct mass measurement of the neutron-deficient nucleus Al 24

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