(d,²He) reaction studies : supernovae evolution and energy dependence of the small angle reaction mechanism at intermediate energies /
We studied the (d,²He) reactions on the p-shell nuclei ⁶Li, ¹²C, ¹³C, and the sd-shell nucleus ²⁴Mg at E[d]=140.5 MeV, and the fp-shell nucleus ⁵⁴Fe, along with ¹²C, at E[d]=124.8 MeV using a dedicated large-acceptance, moderate-resolution detector, the Texas A & M Proton Spectrometer. For the...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2000.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=728415661&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | We studied the (d,²He) reactions on the p-shell nuclei ⁶Li, ¹²C, ¹³C, and the sd-shell nucleus ²⁴Mg at E[d]=140.5 MeV, and the fp-shell nucleus ⁵⁴Fe, along with ¹²C, at E[d]=124.8 MeV using a dedicated large-acceptance, moderate-resolution detector, the Texas A & M Proton Spectrometer. For the targets with A[]24, the measured excitation energy spectra are very similar to those observed in (d,²He) reactions at higher, E[d]=260 MeV, and lower, E[d]=125.2 MeV, energies as well as to the corresponding excitation spectra measured in (p,n) reactions. The angular distributions for the Gamow-Teller states are similar to those measured at 125.2 MeV, and bear a signature of the direct one-step process. The 0⁰ cross-sections are linearly proportional to the Gamow-Teller beta decay strength, with a slope that appears to be independent of energy. The differences in (d,²He) reaction between 125.2 MeV and 140.5 MeV are not substantial. For the ⁵⁴Fe target, the excitation spectra show that we have resolved the low-lying, presumably GT, states observed in (n,p) reactions on the same target. A linear relation between the 0⁰ cross-sections and the previously measured GT strength, proves that we can ascribe the measured GT strength to specific ⁵⁴Mn excited states. These findings demonstrate that the (d,²He) reaction at E[d]=125-140 MeV is a powerful tool for GT studies. |
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| Item Description: | Vita. "Major Subject: Physics". In title: symbols are used. |
| Physical Description: | xi, 118 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 115-117). |