An improved upper limit on the direct 3α decay of the Hoyle state

BISHOP, Jack, SMITH, Robin, KOKALOVA, Tzany, WHELDON, Carl, CURTIS, Neil, FREER, Martin and PARKER, David (2018). An improved upper limit on the direct 3α decay of the Hoyle state. In: 6th International Conference on Production, Energy and Reliability 2018: World Engineering Science & Technology Congress (ESTCON). AIP Conference Proceedings, 2038 . AIP Publishing, 020035.

[img]
Preview
PDF
Smith-ImprovedUpperLimit(VoR).pdf - Published Version
All rights reserved.

Download (2MB) | Preview
Official URL: https://aip.scitation.org/doi/abs/10.1063/1.507885...
Link to published version:: https://doi.org/10.1063/1.5078854
Related URLs:

    Abstract

    The structure of the Hoyle state, a near-threshold 0+ state of extreme astrophysical significance in 12C has long been investigated. An experiment was performed to measure the branching ratio for the decay of this state directly into 3 α-particles. Such a branching ratio is expected to be a good observable for whether the resonance can be described as a dilute gas of α- particles known as an α-condensate. This experiment gave the best upper limits to date for this direct decay via the improvement of the traditionally used DDΦ model to isotropic decay to the available phase space. The new DDP2 model includes three-body penetrabilities and gives a limit of < 0.026% (95% C.L.), a factor of 5 improvement over the previous experimentally obtained limit.

    Item Type: Book Section
    Identification Number: https://doi.org/10.1063/1.5078854
    Page Range: 020035
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 19 Feb 2019 11:25
    Last Modified: 13 Nov 2019 01:18
    URI: http://shura.shu.ac.uk/id/eprint/23391

    Actions (login required)

    View Item View Item

    Downloads

    Downloads per month over past year

    View more statistics