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Studying 11B Proton Structure Via the 10Be(p,n) 10B Reaction

Jones-Alberty, Yenuel S
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1699995675554742

Abstract Details

, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
The production mechanisms for boron, as well as for beryllium and lithium, are hypothesized to lie outside well established standard stellar nucleosynthesis processes. Boron is thought to have been formed via Core Collapse Supernovae as well as via cosmic ray nucleosynthesis. It is an element whose astrophysical origins facilitate a glimpse into some of the more extreme astrophysical processes in the Universe. Boron’s stable isotopes, 10B and 11B, have therefore been studied for some time. The single proton structure of the 11B isotope, however, is understudied. For the purpose of studying the 11B single proton structure, we measured the 10Be(p,n)10B reaction at the Edwards Accelerator Laboratory by bombarding an 85-µg/cm2-thick 10BeO target with a proton beam. Two separate techniques were used: the time-of-fight method, and a neutron counting scheme via the use of proportional counters. The diferential and angle-integrated reaction cross sections were measured in the 0.5 ≤ Ep ≤ 7.0 MeV energy range using the Swinger beamline as well as the Helium Boron-Trifuoride Giant Barrel (HeBGB) neutron detector, respectively. Swinger beamline measurements measured a 0◦ excitation function in the 2.0 ≤ Ep ≤ 7.0 MeV energy range, and resonances were observed at Ep = 2.2-2.5, 3.5, 4.5-4.7, and 5.7 MeV. Angular distributions up to 150◦ and 105◦ were measured at 2.5 and 3.5 MeV, respectively. An angle-integrated excitation function was measured in the 0.5 ≤ Ep ≤ 2.4 MeV energy range using HeBGB. Resonances were observed at Ep = 1.09 - 1.55, 1.8, and 2.4 MeV. Gamma-ray spectra were also measured via the Swinger beamline, using a LaBr3 detector. Gamma-rays corresponding to the decay of the first two excited states of 10B, as well as the first excited state of 7Li, were observed. Lastly, a new target holder for HeBGB was designed and implemented to facilitate beam collimation when bombarding the 10BeO target
Carl Brune (Advisor)
217 p.
Experiments; Nuclear Physics; Physics
10Be measurements; 10Be(p,n)10B measurements; (p,n) reactions; low energy nuclear physics; 11B proton structure; nuclear astrophysics; neutron detection; neutron time-of-flight; Edwards Accelerator Laboratory; proportional counters; HeBGB; radioactive targets

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Citations

  • Jones-Alberty, Y. S. (2023). Studying 11B Proton Structure Via the 10Be(p,n) 10B Reaction [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1699995675554742

    APA Style (7th edition)

  • Jones-Alberty, Yenuel. Studying 11B Proton Structure Via the 10Be(p,n) 10B Reaction. 2023. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1699995675554742.

    MLA Style (8th edition)

  • Jones-Alberty, Yenuel. "Studying 11B Proton Structure Via the 10Be(p,n) 10B Reaction." Doctoral dissertation, Ohio University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1699995675554742

    Chicago Manual of Style (17th edition)

ohiou1699995675554742
300
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This open access ETD is published by Ohio University and OhioLINK.