Differential Cross Section Measurements for the [sup 6]Li(n,t)α Reaction in the Few MeV Region

Measurement of the6Li(n,α) neutron standard cross-section at the GELINA facility

“…One experiment was performed using an ionization chamber similar to the one used at JRC-IRMM (see Sect. 2.2) [2], while the second one employed solid state detectors [3]. Both experiments see a several percent higher cross section than, e.g., the ENDF/B-VII evaluation [4] in this energy region.…”

A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and Kirsch1, Devlin2, Mosby3 et al. 2017Nuclear Instruments and Methods in Physics Research Section A: Self Cite

“…Previous measurements of the 6 Li(n,α)t cross section rely on 6 LiI(Eu) [8][9][10] and Li-glass detectors [11,12], while some use 6 Li target foils [4,13,14]. All previous procedures in the literature utilize charged particle beams to produce neutrons via 1 H(t,n), 2 H(d,n), 3 H(p,n), 7 Li(p,n), or spallation W(p,xn).…”

Measurement of the 6Li(n,α)t neutron standard cross-section at the GELINA facility

“…In this region one also expects three broad resonances to affect the cross section [5]. Two recent independent experiments have reported discrepancies [1,2] and got a cross section several percent higher than the ENDF/B-VII evaluation [3].…”

“…However, it is only considered a neutron standard up to 1 MeV, because in the neutron energy region 1-3 MeV there exist discrepancies of several per cents between recent measurements [1,2] and evaluated data files [3].…”

“…However, it is only considered a neutron standard up to 1 MeV, because in the neutron energy region 1-3 MeV there exist discrepancies of several per cents between recent measurements [1,2] and evaluated data files [3].It has been speculated [4] that neglecting of the particle leaking effect might be part of the explanation why there is a disagreement in this region. Based on R-matrix calculations, in the region around 2 MeV, one also expects three excitation levels of 7 Li to significantly influence the cross section [5].…”