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SUMMARY:Measurement of 27Al(α\, nγ)30P reaction yields and angular corre
 lations.
DTSTART;VALUE=DATE-TIME:20240528T173000Z
DTEND;VALUE=DATE-TIME:20240528T190000Z
DTSTAMP;VALUE=DATE-TIME:20261011T080826Z
UID:indico-contribution-23122@indico.ific.uv.es
DESCRIPTION:Speakers: Odette Alonso-Sañudo (Grupo de Física Nuclear (GFN
 ) and IPARCOS\, Universidad Complutense (UCM))\nReactions induced by alpha
  particles are important in multiple research areas such as nuclear astrop
 hysics\, nuclear technologies\,dark matter searches and neutrino physics. 
 Accurate data on neutron yields from the interaction of α-particles with 
 nuclei via (α\, n) reactions are of particular interest in this context. 
 Despite the existence of experimental data and libraries\, they show large
  discrepances and they are not compatible with the declared uncertainties.
  In addition\, such libraries are only available for a few isotopes\, and 
 the spectroscopic information available is limited. The need for new measu
 rements with higher precision has been recently recognized [1]. This work 
 is focused on the reaction 27Al(α\, n)30P \, which served as a benchmark 
 to compare measurements from previous experiments and cross check experime
 ntal techniques. The measurements are part of a larger project\, the Spani
 sh MANY collaboration (Measurement of Alpha Neutron Yields)\, whose ultima
 te goal is the measurement of (α\, xn) production yields\, reaction cross
 -sections and neutron energy spectra. Here we focus in particular on the m
 easurement of 27Al(α\, n) reaction yields via activation and 27Al(α\, n
 γ) production yields. One of the objectives of this work is the commissio
 ning of the new experimental beamline and of the detector systems via a pr
 eviously measured 27Al(α\, n)30P reaction. The experiment was carried in 
 two independent beam times at the CMAM (Centro de Micro-Análisis de Mater
 iales) laboratory in Madrid [2]\, Spain using an array of ten LaBr3(Ce) FA
 TIMA-type [3] detectors placed at selected angles in the laboratory frame.
  The gamma spectroscopy measurements allow to determine the total reaction
  yield from the decay of the activation products and the (α\, nγ) yield 
 from the de-excitation of the states in the target nuclei. The setup was c
 omplemented by a high-resolution HPGe detector to aid gamma-ray identifica
 tion.\nThe presentation will address the thick-target yields obtained by a
 ctivation in the 5 to 15 MeV energy range\, the gamma yields resulting for
  the 27Al(α\, nγ) reaction as a function of energy\, and the effect of a
 ngular correlations on the experimentally obtained gamma yields.\n\n**Refe
 rences.**\n[1] S. Westerdale et al.\, Tech. Report INDC (2022) NDS-0836\n[
 2] A. Redondo-Cubero et al.\, Eur. Phys. J. Plus 136 (2021) 175\n[3] V. Ve
 dia et al.\, Nucl. Instrum. Methods A 857 (2017) 98\n\nhttps://indico.ific
 .uv.es/event/7332/contributions/23122/
LOCATION:ADEIT - Valencia
URL:https://indico.ific.uv.es/event/7332/contributions/23122/
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