Investigation of the Hoyle state in12C with a new hodoscope detector

40th Symposium on Nuclear Physics 2017

Dell'Aquila, D.^1,2,3 ; Lombardo, I.^1,2 ; Vigilante, M.^1,2 ; De Luca, M.^1 ; Acosta, L.^4 ; Agodi, C.^5 ; Cappuzzello, F.^5,6 ; Carbone, D.^5 ; Cavallaro, M.^5 ; Cherubini, S.^5,6 ; Cvetinovic, A.^5 ; D'Agata, G.^5,6 ; Francalanza, L.^2 ; Guardo, G.L.^5 ; Gulino, M.^5,7 ; Indelicato, I.^5 ; La Cognata, M.^5 ; Lamia, L.^6 ; Ordine, A.^2 ; Pizzone, R.^5 ; Puglia, S.^5 ; Rapisarda, G.^5 ; Romano, S.^5 ; Santagati, G.^5 ; Spartà, R.^5 ; Spitaleri, C.^5,6 ; Tumino, A.^5,7 ; Verde, G.^3,8

Dip. di Fisica E. Pancini, Università di Napoli Federico II, Napoli

I-80126, Italy^1

INFN-Sezione di Napoli, Napoli

I-80126, Italy^2

Institut de Physique Nuclaire, CNRS-IN2P3, Univ. Paris-Sud, Universit Paris-Saclay, Orsay Cedex

91406, France^3

National Autonomous University of Mexico, A.P. 20-364, México D.F.

01000, Mexico^4

INFN, Laboratori Nazionali Del Sud, Via S. Sofia, Catania

I-95125, Italy^5

Dip. di Fisica e Astronomia, Università di Catania, Via S. Sofia, Catania

I-95125, Italy^6

Facoltà di Ingegneria Ed Architettura, Universita Kore, Enna

I-94100, Italy^7

INFN, Sezione di Catania, Via S. Sofia, Catania

I-95125, Italy^8

关键词: Clustering phenomena;    Decay mechanisms;    Structure property;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/876/1/012006/pdf
DOI  :  10.1088/1742-6596/876/1/012006

来源: IOP

【 摘 要 】

The 0+2state in12C (7.654MeV, the Hoyle state) is important for the understanding of clustering phenomena in nuclei. The pronounced cluster nature of this state allows the triple-α process in stars with a reaction rate regulated by its structure properties. To precisely estimate the direct component in the 3α decay mechanism of the Hoyle state, we developed a new experiment using the14N(d,α)12C reaction at 10.5MeV. An anti-coincidence telescope was used to identify the α ejectiles leading the residual12C in the Hoyle state, while its decays in 3αwere studied by means of a new hodoscope of silicon detectors, superOSCAR, placed in kinematical coincidence to fully reconstruct the events. Details of the experiment and preliminary results are discussed in the text.