Neutron production from thick-target (α, n) reactions

Heaton, R.; Lee, H.; Skensved, P.; Robertson, B.C.

doi:10.1016/0168-9002(89)90579-2

Cited by 63 publications

(67 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NEDIS and SOURCES yields for Boron divide at ~8 MeV, with SOURCES data being coincident with that from Ref. 22 that extrapolates experimental values beyond 7.5 MeV.…”

Section: Yield Dependence On Alpha Energysupporting

confidence: 54%

Comparison of thick-target (alpha,n) yield calculation codes

2017

View full text Add to dashboard Cite

Abstract. Neutron production yields and energy distributions from (D,n) reactions in light elements were calculated using three different codes (SOURCES, NEDIS and USD) and compared with the existing experimental data in the 3.5-10 MeV alpha energy range. SOURCES and NEDIS display an agreement between calculated and measured yields in the decay series of 235 U, 238 U and 232 Th within r10% for most materials. The discrepancy increases with alpha energy but still an agreement of r20% applies to all materials with reliable elemental production yields (the few exceptions are identified). The calculated neutron energy distributions describe the experimental data, with NEDIS retrieving very well the detailed features. USD generally underestimates the measured yields, in particular for compounds with heavy elements and/or at high alpha energies. The energy distributions exhibit sharp peaks that do not match the observations. These findings may be caused by a poor accounting of the alpha particle energy loss by the code. A big variability was found among the calculated neutron production yields for alphas from Sm decay; the lack of yield measurements for low (~2 MeV) alphas does not allow to conclude on the codes' accuracy in this energy region.

show abstract

“…NEDIS and SOURCES yields for Boron divide at ~8 MeV, with SOURCES data being coincident with that from Ref. 22 that extrapolates experimental values beyond 7.5 MeV.…”

Section: Yield Dependence On Alpha Energysupporting

confidence: 54%

Comparison of thick-target (alpha,n) yield calculation codes

2017

View full text Add to dashboard Cite

show abstract

“…The total flux has been estimated to be around 4000 n/(m 2 d) [34][35][36] for norite rock. The neutron energy is below 15 MeV and peaked around 2.5 MeV [37]; Neutrons induced by muon interactions in the rock.…”

Section: Underground Activationmentioning

confidence: 99%

Cosmogenic activation of a natural tellurium target

Petzoldt

2015

Astroparticle Physics

View full text Add to dashboard Cite

130Te is one of the candidates for the search for neutrinoless double beta decay. It is currently planned to be used in two experiments: CUORE and SNO+. In the CUORE experiment TeO2 crystals cooled at cryogenic temperatures will be used. In the SNO+ experiment natTe will be deployed up to 0.3% loading in the liquid scintillator volume. A possible background for the signal searched for, are the high Q-value, long-lived isotopes, produced by cosmogenic neutron and proton spallation reaction on the target material. A total of 18 isotopes with Q-value larger than 2 MeV and T1/2 >20 days have been identified as potential backgrounds. In addition low Q-value, high rate isotopes can be problematic due to pile-up effects, specially in liquid scintillator based detectors. Production rates have been calculated using the ACTIVIA program, the TENDL library, and the cosmogenic neutron and proton flux parametrization at sea level from Armstrong and Gehrels for both long and short lived isotopes. The obtained values for the cross sections are compared with the existing experimental data and calculations. Good agreement has been generally found. The results have been applied to the SNO+ experiment for one year of exposure at sea level. Two possible cases have been considered: a two years of cooling down period deep underground, or a first purification on surface and 6 months of cooling down deep underground. Deep underground activation at the SNOLAB location has been considered

show abstract

“…dE=dxðEÞ is the molecular stopping power of the target loaded with deuterium. The Bragg's law of additivity [23] was applied to determine the stopping power in the target, as shown in the following equation:…”

Section: D-d Reaction Ratementioning

confidence: 99%