Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

J. Sinclair; M. Scheck; S. W. Finch; Krishichayan; U. Friman-Gayer; W. Tornow; G. Battaglia; T. Beck; R. Chapman; M. M. R. Chishti; Ch. Fransen; R. Gonzales; E. Hoemann; J. Isaak; R. V. F. Janssens; D. A. Jaroszynski; S. Johnson; M. D. Jones; J. M. Keatings; N. Kelly; J. Kleemann; D. Little; B. Löher; K. R. Mashtakov; M. Müscher; D. O’Donnell; O. Papst; E. E. Peters; D. Savran; M. Schilling; R. Schwengner; P. Spagnoletti; M. Spieker; V. Werner; J. Wilhelmy; O. Wieland; S. W. Yates; A. Zilges

doi:10.1140/epja/s10050-020-00118-8

Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

J. Sinclair
, M. Scheck^*
, S. W. Finch
, Krishichayan
, U. Friman-Gayer
, W. Tornow
, G. Battaglia
, T. Beck
, R. Chapman
, M. M. R. Chishti
, Ch. Fransen
, R. Gonzales
, E. Hoemann
, J. Isaak
, R. V. F. Janssens
, D. A. Jaroszynski
, S. Johnson
, M. D. Jones
, J. M. Keatings
, N. Kelly

J. Kleemann, D. Little, B. Löher, K. R. Mashtakov, M. Müscher, D. O’Donnell, O. Papst, E. E. Peters, D. Savran, M. Schilling, R. Schwengner, P. Spagnoletti, M. Spieker, V. Werner, J. Wilhelmy, O. Wieland, S. W. Yates, A. Zilges

^*Corresponding author for this work

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

2 Citations (Scopus)

21 Downloads (Pure)

Abstract

A natural silicon target was investigated in a ^natSi(γ, γ^′) photon-scattering experiment with fully linearly-polarised, quasi-monochromatic γ rays in the entrance channel. The mean photon energies used were ⟨ E_γ⟩ = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was ΔE_γ/ ⟨ E_γ⟩ ≈ 3.5–4 %. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.

Original language	English
Article number	105
Number of pages	7
Journal	European Physical Journal A
Volume	56
Issue number	4
DOIs	https://doi.org/10.1140/epja/s10050-020-00118-8
Publication status	Published - 6 Apr 2020

Funding

The authors are indebted to the accelerator crew of HI γ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbf {\gamma }$$\end{document} S, who provided excellent experimental conditions. The UWS group acknowledges financial support by the UK Science and Technology Facilities Council (UK-STFC). The TU Darmstadt members acknowledge financial support by the Deutsche Forschungsgemeinschaft (SFB-1245). In addition, OP and JK acknowledge financial support by the German state of Hesse under the grant Nuclear Photonics within the LOEWE program. The Cologne group acknowledges financial support from the German Bundesministerium für Bildung und Forschung under Grant 05P2018/ELI-NP. This work was supported by the US Department of Energy (DOE), Office of Nuclear Physics, under Grant no. DE-FG02-97ER41033 (Duke University) and DE-FG02-97ER41041 (UNC) and the U.S. National Science Foundation under Grants nos. PHY-1565546 (NSCL) and PHY-1913028. GB and DAJ acknowledge support of the UK EPSRC (Grant no. EP/N028694/1), the EC’s Laserlab-Europe, H2020 EC-GA 654148 and ELI - Extreme Light Infrastructure phase 2 from the European Regional Development Fund.

Keywords

photon-scattering
silicon
spin

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10.1140/epja/s10050-020-00118-8Licence: CC BY 4.0

Sinclair-etal-EPJA-2020-Firm-spin-and-parity-assignmentsFinal published version, 409 KBLicence: CC BY 4.0

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Sinclair, J., Scheck, M., Finch, S. W., Krishichayan, Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, C., Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., ... Zilges, A. (2020). Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes. European Physical Journal A, 56(4), Article 105. https://doi.org/10.1140/epja/s10050-020-00118-8

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title = "Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes",

abstract = "A natural silicon target was investigated in a natSi(γ, γ′) photon-scattering experiment with fully linearly-polarised, quasi-monochromatic γ rays in the entrance channel. The mean photon energies used were ⟨ Eγ⟩ = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was ΔEγ/ ⟨ Eγ⟩ ≈ 3.5–4 \%. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.",

keywords = "photon-scattering, silicon, spin",

author = "J. Sinclair and M. Scheck and Finch, \{S. W.\} and Krishichayan and U. Friman-Gayer and W. Tornow and G. Battaglia and T. Beck and R. Chapman and Chishti, \{M. M. R.\} and Ch. Fransen and R. Gonzales and E. Hoemann and J. Isaak and Janssens, \{R. V. F.\} and Jaroszynski, \{D. A.\} and S. Johnson and Jones, \{M. D.\} and Keatings, \{J. M.\} and N. Kelly and J. Kleemann and D. Little and B. L{\"o}her and Mashtakov, \{K. R.\} and M. M{\"u}scher and D. O{\textquoteright}Donnell and O. Papst and Peters, \{E. E.\} and D. Savran and M. Schilling and R. Schwengner and P. Spagnoletti and M. Spieker and V. Werner and J. Wilhelmy and O. Wieland and Yates, \{S. W.\} and A. Zilges",

year = "2020",

month = apr,

day = "6",

doi = "10.1140/epja/s10050-020-00118-8",

language = "English",

volume = "56",

journal = "European Physical Journal A",

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Sinclair, J, Scheck, M, Finch, SW, Krishichayan, Friman-Gayer, U, Tornow, W, Battaglia, G, Beck, T, Chapman, R, Chishti, MMR, Fransen, C, Gonzales, R, Hoemann, E, Isaak, J, Janssens, RVF, Jaroszynski, DA, Johnson, S, Jones, MD, Keatings, JM, Kelly, N, Kleemann, J, Little, D, Löher, B, Mashtakov, KR, Müscher, M, O’Donnell, D, Papst, O, Peters, EE, Savran, D, Schilling, M, Schwengner, R, Spagnoletti, P, Spieker, M, Werner, V, Wilhelmy, J, Wieland, O, Yates, SW & Zilges, A 2020, 'Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes', European Physical Journal A, vol. 56, no. 4, 105. https://doi.org/10.1140/epja/s10050-020-00118-8

TY - JOUR

T1 - Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

AU - Sinclair, J.

AU - Scheck, M.

AU - Finch, S. W.

AU - Krishichayan, null

AU - Friman-Gayer, U.

AU - Tornow, W.

AU - Battaglia, G.

AU - Beck, T.

AU - Chapman, R.

AU - Chishti, M. M. R.

AU - Fransen, Ch.

AU - Gonzales, R.

AU - Hoemann, E.

AU - Isaak, J.

AU - Janssens, R. V. F.

AU - Jaroszynski, D. A.

AU - Johnson, S.

AU - Jones, M. D.

AU - Keatings, J. M.

AU - Kelly, N.

AU - Kleemann, J.

AU - Little, D.

AU - Löher, B.

AU - Mashtakov, K. R.

AU - Müscher, M.

AU - O’Donnell, D.

AU - Papst, O.

AU - Peters, E. E.

AU - Savran, D.

AU - Schilling, M.

AU - Schwengner, R.

AU - Spagnoletti, P.

AU - Spieker, M.

AU - Werner, V.

AU - Wilhelmy, J.

AU - Wieland, O.

AU - Yates, S. W.

AU - Zilges, A.

PY - 2020/4/6

Y1 - 2020/4/6

N2 - A natural silicon target was investigated in a natSi(γ, γ′) photon-scattering experiment with fully linearly-polarised, quasi-monochromatic γ rays in the entrance channel. The mean photon energies used were ⟨ Eγ⟩ = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was ΔEγ/ ⟨ Eγ⟩ ≈ 3.5–4 %. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.

AB - A natural silicon target was investigated in a natSi(γ, γ′) photon-scattering experiment with fully linearly-polarised, quasi-monochromatic γ rays in the entrance channel. The mean photon energies used were ⟨ Eγ⟩ = 9.33, 9.77, 10.17, 10.55, 10.93, and 11.37 MeV, and the relative energy spread (full width at half maximum) of the incident beam was ΔEγ/ ⟨ Eγ⟩ ≈ 3.5–4 %. The observed angular distributions for the ground-state decay allow firm spin and parity assignments for several levels of the stable even-even silicon isotopes.

KW - photon-scattering

KW - silicon

KW - spin

UR - https://www.scopus.com/pages/publications/85083189745

U2 - 10.1140/epja/s10050-020-00118-8

DO - 10.1140/epja/s10050-020-00118-8

M3 - Article

AN - SCOPUS:85083189745

SN - 1434-6001

VL - 56

JO - European Physical Journal A

JF - European Physical Journal A

IS - 4

M1 - 105

ER -

Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

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