New segmented target for studies of neutron unbound systems

T. Redpath; T. Baumann; J. Brown; D. Chrisman; P. A. DeYoung; N. Frank; P. Guèye; A. N. Kuchera; H. Liu; C. Persch; S. Stephenson; K. Stiefel; M. Thoennessen; D. Votaw

doi:10.1016/j.nima.2020.164284

New segmented target for studies of neutron unbound systems

T. Redpath
, T. Baumann
, J. Brown
, D. Chrisman
, P. A. DeYoung
, N. Frank
, P. Guèye
, A. N. Kuchera
, H. Liu
, C. Persch
, S. Stephenson
, K. Stiefel
, M. Thoennessen
, D. Votaw

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

4 Scopus citations

Abstract

The study of neutron-unbound systems using invariant mass spectroscopy is often performed using low-intensity radioactive ion beams. Low reaction yields can be countered by using thick targets but at the expense of larger uncertainties in the reconstructed invariant mass. We present a new segmented target designed to address this trade-off. It is composed of three ∼4 mm thick passive beryllium targets interleaved between four 140μm thick position sensitive silicon detectors. In the first experiment to use this new system the half-life of two-neutron unbound ²⁶O was measured to be T_1∕2=5.0_−2.2^+1.7 (stat)±1.7 (syst) ps, which agrees with a previous measurement made by the MoNA Collaboration.

Original language	English
Article number	164284
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	977
DOIs	https://doi.org/10.1016/j.nima.2020.164284
State	Published - Oct 11 2020
Externally published	Yes

Funding

This work was supported by the National Science Foundation, USA under Grants No. PHY-1102511, PHY-1565546 , PHY-1613188 , PHY-1713522 , PHY-1613429 , PHY-1713956 . This work was also supported by the Department of Energy National Nuclear Security Administration, USA through the Nuclear Science and Security Consortium under Award No. DE-NA0003180 .

Keywords

Half-life
Invariant mass spectroscopy
Neutron drip line
Radioactive ion beam
Reaction yield
Silicon detectors

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10.1016/j.nima.2020.164284

Cite this

Redpath, T., Baumann, T., Brown, J., Chrisman, D., DeYoung, P. A., Frank, N., Guèye, P., Kuchera, A. N., Liu, H., Persch, C., Stephenson, S., Stiefel, K., Thoennessen, M., & Votaw, D. (2020). New segmented target for studies of neutron unbound systems. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 977, Article 164284. https://doi.org/10.1016/j.nima.2020.164284

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title = "New segmented target for studies of neutron unbound systems",

abstract = "The study of neutron-unbound systems using invariant mass spectroscopy is often performed using low-intensity radioactive ion beams. Low reaction yields can be countered by using thick targets but at the expense of larger uncertainties in the reconstructed invariant mass. We present a new segmented target designed to address this trade-off. It is composed of three ∼4 mm thick passive beryllium targets interleaved between four 140μm thick position sensitive silicon detectors. In the first experiment to use this new system the half-life of two-neutron unbound 26O was measured to be T1∕2=5.0−2.2+1.7 (stat)±1.7 (syst) ps, which agrees with a previous measurement made by the MoNA Collaboration.",

keywords = "Half-life, Invariant mass spectroscopy, Neutron drip line, Radioactive ion beam, Reaction yield, Silicon detectors",

author = "T. Redpath and T. Baumann and J. Brown and D. Chrisman and DeYoung, \{P. A.\} and N. Frank and P. Gu{\`e}ye and Kuchera, \{A. N.\} and H. Liu and C. Persch and S. Stephenson and K. Stiefel and M. Thoennessen and D. Votaw",

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Redpath, T, Baumann, T, Brown, J, Chrisman, D, DeYoung, PA, Frank, N, Guèye, P, Kuchera, AN, Liu, H, Persch, C, Stephenson, S, Stiefel, K, Thoennessen, M & Votaw, D 2020, 'New segmented target for studies of neutron unbound systems', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 977, 164284. https://doi.org/10.1016/j.nima.2020.164284

TY - JOUR

T1 - New segmented target for studies of neutron unbound systems

AU - Redpath, T.

AU - Baumann, T.

AU - Brown, J.

AU - Chrisman, D.

AU - DeYoung, P. A.

AU - Frank, N.

AU - Guèye, P.

AU - Kuchera, A. N.

AU - Liu, H.

AU - Persch, C.

AU - Stephenson, S.

AU - Stiefel, K.

AU - Thoennessen, M.

AU - Votaw, D.

PY - 2020/10/11

Y1 - 2020/10/11

N2 - The study of neutron-unbound systems using invariant mass spectroscopy is often performed using low-intensity radioactive ion beams. Low reaction yields can be countered by using thick targets but at the expense of larger uncertainties in the reconstructed invariant mass. We present a new segmented target designed to address this trade-off. It is composed of three ∼4 mm thick passive beryllium targets interleaved between four 140μm thick position sensitive silicon detectors. In the first experiment to use this new system the half-life of two-neutron unbound 26O was measured to be T1∕2=5.0−2.2+1.7 (stat)±1.7 (syst) ps, which agrees with a previous measurement made by the MoNA Collaboration.

AB - The study of neutron-unbound systems using invariant mass spectroscopy is often performed using low-intensity radioactive ion beams. Low reaction yields can be countered by using thick targets but at the expense of larger uncertainties in the reconstructed invariant mass. We present a new segmented target designed to address this trade-off. It is composed of three ∼4 mm thick passive beryllium targets interleaved between four 140μm thick position sensitive silicon detectors. In the first experiment to use this new system the half-life of two-neutron unbound 26O was measured to be T1∕2=5.0−2.2+1.7 (stat)±1.7 (syst) ps, which agrees with a previous measurement made by the MoNA Collaboration.

KW - Half-life

KW - Invariant mass spectroscopy

KW - Neutron drip line

KW - Radioactive ion beam

KW - Reaction yield

KW - Silicon detectors

UR - https://www.scopus.com/pages/publications/85087393381

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DO - 10.1016/j.nima.2020.164284

M3 - Article

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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 - 164284

ER -

New segmented target for studies of neutron unbound systems

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