One proton, two proton, and alpha emission from ¹⁴O + [alpha] resonance interactions /
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[College Station, Tex.] :
[Texas A&M University],
[2010]
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| Online Access: | Link to OAK Trust copy |
| Abstract: | In this dissertation, proton, two proton, and emission from the ¹⁴O + [alpha] interactions were studied with the modified thick target inverse kinematics approach. The radioactive beam was obtained by using resonances in the ¹⁴O (p, n)¹⁴O reaction. The ¹⁴O was > 99% pure. By using a beam analysis system, the contaminant-tobeam ratio was suppressed further to the 10⁻⁴ level. This makes the ¹⁴O beam at TAMU one of the best available. For the ¹⁴O ([alpha], 2p) interaction, it was found that the resonance excited states in ¹⁸Ne are populated, and most of them decay sequentially to the ground state of ¹⁶O, i.e. ¹⁸Ne * [arrow] ¹⁷F* + p [arrow] ¹⁶O + p + p. Two proton events corresponding to the excited state of ¹⁸Ne*(8.45MeV), were found to have strong 2p correlation, which is the fingerprint of ²He-decay. Several models were used to explain this decay process, and evidence suggests that this state decays by ²He-emission. By measuring the Time-Of-Flight for protons through the thick target, the location of ¹⁴O ([alpha], p) reactions occurring at different places in the helium gas target were identified. With this information, we were able to measure a spectrum of protons corresponding to the population of ¹⁷F particle stable states in the ¹⁴O ([alpha], p)¹⁷F reaction. This method provides a new way to measure astrophysically important reactions which involve radioactive nuclei and a particles. By analyzing elastic scattering of ¹⁴O and ¹⁴C on ⁴He, [alpha]-cluster states in ¹⁸Ne* and ¹⁸O* were found. Some [alpha]-cluster states in ¹⁸Ne* were found for the first time. |
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| Item Description: | "Major Subject: Physics" Title from author supplied metadata (automated record created 2010-03-12 12:08:51). Electronic resource. |
| Physical Description: | 1 online resource. |
| Bibliography: | Includes bibliographical references. |