Measurements of the $^{27}{\rm Al}(\alpha,n)$ Thick Target Yield Near Threshold
| Autor: | Brandenburg, K., Hamad, G., Meisel, Z., Brune, C. R., Carter, D. E., Derkin, J., Ingram, D. C., Jones-Alberty, Y., Kenady, B., Massey, T. N., Saxena, M., Soltesz, D., Subedi, S. K., Warren, J. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1080/00295639.2022.2118483 |
| Popis: | We present results from direct measurements of the $^{27}{\rm Al}(\alpha,n)$ thick target yield from laboratory incident energies $E_{\alpha}\approx$ 3$-$5~MeV, performed with the $^{3}$HeBF$_{3}$ Giant Barrel (HeBGB) neutron detector at the Edwards Accelerator Laboratory. Our measurements have a small energy cadence in order to address discrepancies and sparseness of thick-target yield data sets existing for this energy region. We find general agreement with existing data sets, including yields derived from cross section data, while resolving a discrepancy between existing thick-target yield data sets for $E_{\alpha}\approx4-5$~MeV. However, for $E_{\alpha}<3.5$~MeV, our results are substantially lower than previous thick-target yield data and somewhat larger than yields calculated from existing cross section data. Our data complete the energy-range needed for estimates of the $^{27}{\rm Al}(\alpha,n)$ contribution to neutrino and dark matter detector backgrounds and result in increased viability of $^{27}{\rm Al}(\alpha,n)$ as a plasma diagnostic tool at fusion facilities such as the National Ignition Facility. Comment: Accepted to Nuclear Science and Engineering |
| Databáze: | arXiv |
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