Measurement of the photodissociation of the deuteron at energies relevant to Big Bang nucleosynthesis

6th Nuclear Physics in Astrophysics

物理学;天文学

Hannaske, R.^1,2 ; Bemmerer, D.^1 ; Beyer, R.^1 ; Birgersson, E.^1 ; Ferrari, A.^1 ; Grosse, E.^1,2 ; Junghans, A.R.^1 ; Kempe, M.^1 ; Kögler, T.^1,2 ; Kosev, K.^1 ; Marta, M.^1 ; Massarczyk, R.^1,2 ; Matic, A.^1 ; Schilling, K.D.^1 ; Schramm, G.^1,2 ; Schwengner, R.^1 ; Wagner, A.^1 ; Yakorev, D.^1,2

Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, Dresden

01328, Germany^1

Technische Universität Dresden, Dresden

01062, Germany^2

关键词: Big bang nucleosynthesis;    Energy ranges;    Key reactions;    Neutron spectra;    Time of flight;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012003/pdf
DOI  :  10.1088/1742-6596/665/1/012003

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The photodissociation of the deuteron is a key reaction in Big Bang nucleosynthesis, but is only sparsely measured in the relevant energy range. To determine the cross section of the d(γ,n)p reaction we used pulsed bremsstrahlung and measured the time-of-flight of the neutrons. In this article, we describe how the efficiency of the neutron detectors was experimentally determined and how the modification of the neutron spectrum by parts of the experimental setup was simulated and corrected.