Tests and calibrations of nuclear track detectors (CR39) for operation in high neutron flux

The Interaction of Neutrons With 7Be: Lack of Standard Nuclear Physics Solution to the "Primordial 7Li Problem"

“…Our measured MACS in the BBN window does not agree with previous s and p waves extrapolations into the BBN window and we conclude neutron s -wave dominance in the BBN window. We provide new Wagoner-like burning rate of the 7 Be(n,α) reaction which is based on world data solely [19,[21][22][23]26]. We did not observe a hitherto unknown resonance in the BBN window that would lead to large cross section, large enough to solve the "Primordial 7 Li Problem" and we conclude on lack of standard nuclear solution of the "Primordial 7 Li Problem".…”

“…The current paper presents the results of the SARAF US-Israel-Switzerland collaboration that were approved for public presentation in the DNP meeting of the American Physical Society in Vancouver, Canada on October 14, 2016 [19]. All members of the collaboration listed as co-authors in [19] approved the results presented in the DNP meeting in October 2016. In addition this invited talk by the author and a second poster paper by E.E.…”

“…In addition this invited talk by the author and a second poster paper by E.E. Kading et al in this NPA8 meeting [27], was approved by the collaboration on February 2, 2017. Specifically all co-authors listed the NPA8 poster paper [27] approved on February 4, 2017 the paper [27] which also referenced the invited talk of the author.…”

“…The neutrons produced at SARAF with an "effective temperature" kT = 49.5 keV (energies spread from 1 to 180 keV) are ideally suited for example to measure neutron interactions with 7 Be in the Big Bang Nucleosynthesis (BBN) window of T = 0.5 -0.8 GK and kT = 43 -72 keV. Measurements of neutron interaction with 7 Be in the BBN window [19] are essential for shedding light on the "Primordial 7 Li Problem" in order to estimate the rate of destruction of 7 Be during BBN. This provides strong motivation for the development of experimental protocols that enable the use of robust detectors such as polymer based Nuclear Track Detectors (NTD).…”

“…Kading et al in this NPA8 meeting [27], was approved by the collaboration on February 2, 2017. Specifically all co-authors listed the NPA8 poster paper [27] approved on February 4, 2017 the paper [27] which also referenced the invited talk of the author. On March 14, 2017, the collaboration learned that two colleagues had a change of mind.…”