تقرير
Measuring the cross section of the $^{15}$N($\alpha$,$\gamma$)$^{19}$F reaction using a single-fluid bubble chamber
| العنوان: | Measuring the cross section of the $^{15}$N($\alpha$,$\gamma$)$^{19}$F reaction using a single-fluid bubble chamber |
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| المؤلفون: | Neto, D., Bailey, K., Benesch, J. F., Cade, B., DiGiovine, B., Freyberger, A., Grames, J. M., Hofler, A., Holt, R. J., Kazimi, R., Meekins, D., McCaughan, M., Moser, D., O'Connor, T., Poelker, M., Rehm, K. E., Riordan, S., Suleiman, R., Talwar, R., Ugalde, C. |
| سنة النشر: | 2023 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | $^{15}$N($\alpha$,$\gamma$)$^{19}$F is believed to be the primary means of stellar nucleosynthesis of fluorine. Here we present the use of a single-fluid bubble chamber to measure the cross section of the time-inverse photo-dissociation reaction. The method benefits from a luminosity increase of several orders of magnitude due to the use of a thicker liquid target -- when compared to thin films or gas targets -- and from the reciprocity theorem. We discuss the results of an experiment at the Thomas Jefferson National Accelerator Facility, where the cross section of the photodisintegration process $^{19}$F($\gamma$, $\alpha$)$^{15}$N was measured by bombarding a superheated fluid of C$_3$F$_8$ with bremsstrahlung $\gamma$-rays produced by impinging a 4 - 5.5 MeV electron beam on a Cu radiator. From the photodissociation yield the cross section was extracted by performing a convolution with a Monte Carlo-generated $\gamma$-ray beam spectrum. The measurement produced a cross section that was then time inverted using the reciprocity theorem. The cross section for the $^{15}$N($\alpha$,$\gamma$)$^{19}$F reaction was determined down to a value in the range of hundreds of picobarns. With further improvements of the experimental setup the technique could potentially push cross section measurements down to the single picobarn range. Comment: Corrected Typos. Accepted for Publication in Physical Review C |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.107.035801 |
| URL الوصول: | http://arxiv.org/abs/2302.12760 |
| رقم الأكسشن: | edsarx.2302.12760 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.107.035801 |
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