Two-proton pickup studies with the (6Li,8B) reaction
Description
The (/sup 6/Li,/sup 8/B) reaction has been investigated on targets of /sup 26/Mg, /sup 24/Mg, /sup 16/O, /sup 13/C, /sup 12/C, /sup 11/B, /sup 10/B, and /sup 9/Be at a bombarding energy of 80.0 MeV, and on targets of /sup 16/O, /sup 12/C, /sup 9/Be, /sup 7/Li, and /sup 6/Li at a bombarding energy of 93.3 MeV. Only levels consistent with direct, single-step two-proton pickup reaction mechanisms were observed to be strongly populated. On T/sub z/ = 0 targets, the spectroscopic selectivity of this reaction resembles that of the analogous (p,t) reaction. Additionally, these data demonstrate the dominance of spatially … continued below
Physical Description
Pages: 132
Creation Information
Weisenmiller, Robert Benjamin December 3, 1976.
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Lawrence Berkeley Laboratory
Publisher Info: California Univ., Berkeley (USA). Lawrence Berkeley Lab.Place of Publication: Berkeley, California
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Description
The (/sup 6/Li,/sup 8/B) reaction has been investigated on targets of /sup 26/Mg, /sup 24/Mg, /sup 16/O, /sup 13/C, /sup 12/C, /sup 11/B, /sup 10/B, and /sup 9/Be at a bombarding energy of 80.0 MeV, and on targets of /sup 16/O, /sup 12/C, /sup 9/Be, /sup 7/Li, and /sup 6/Li at a bombarding energy of 93.3 MeV. Only levels consistent with direct, single-step two-proton pickup reaction mechanisms were observed to be strongly populated. On T/sub z/ = 0 targets, the spectroscopic selectivity of this reaction resembles that of the analogous (p,t) reaction. Additionally, these data demonstrate the dominance of spatially symmetric transfer of the two protons. On T/sub z/ greater than 0 targets the (/sup 6/Li,/sup 8/B) reaction was employed to locate two previously unreported levels (at 7.47 +- 0.05 MeV and 8.86 +- 0.07 MeV) in the T/sub z/ = 2 nuclide /sup 24/Ne and to establish the low-lying 1p-shell states in the T/sub z/ = /sup 3///sub 2/ nuclei /sup 11/Be, /sup 9/Li, and /sup 7/He. However, no evidence was seen for any narrow levels in the T/sub z/ = /sup 3///sub 2/ nuclide /sup 5/H nor for any narrow excited states in /sup 7/He. The angular distributions reported here are rather featureless and decrease monotonically with increasing angle. This behavior can be shown by a semi-classical reaction theory to be a consequence of the reaction kinematics. A semi-classical approach also suggests that the kinematic term in the transition matrix element is only weakly dependent upon the angular momentum transfer (which is consistent with simple Distorted Wave Born Approximation calculations). However, only qualitative agreement was obtained between the observed relative transition yields and semi-classical predictions, using the two-nucleon coefficients of fractional parentage of Cohen and Kurath, probably due to the limitations of the semi-classical reaction theory.
Physical Description
Pages: 132
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Keywords
- Alkali Metal Isotopes
- Alkaline Earth Isotopes
- Angular Distribution
- Beryllium 10
- Beryllium 11
- Beryllium 9 Target
- Beryllium Isotopes
- Beta Decay Radioisotopes
- Beta-Minus Decay Radioisotopes
- Beta-Plus Decay Radioisotopes
- Boron 10 Target
- Boron 11 Target
- Boron 8
- Boron Isotopes
- Carbon 12 Target
- Carbon 13 Target
- Carbon 14
- Carbon Isotopes
- Charged-Particle Reactions
- Direct Reactions
- Distribution
- Energy
- Energy Levels
- Energy Range
- Even-Even Nuclei
- Even-Odd Nuclei
- Heavy Ion Reactions
- Helium 7
- Helium Isotopes
- Hydrogen 4
- Hydrogen 5
- Hydrogen Isotopes
- Isotopes
- Light Nuclei
- Lithium 6 Reactions
- Lithium 6 Target
- Lithium 7 Target
- Lithium 8
- Lithium 9
- Lithium Isotopes
- Magnesium 24 Target
- Magnesium 26 Target
- Mev Range
- Mev Range 10-100
- Minutes Living Radioisotopes
- Multi-Nucleon Transfer Reactions
- Neon 22
- Neon 24
- Neon Isotopes
- Nuclear Reactions
- Nuclei
- Odd-Even Nuclei
- Odd-Odd Nuclei
- Oxygen 16 Target
- Pickup Reactions
- Q-Value
- Radioisotopes
- Seconds Living Radioisotopes
- Stable Isotopes
- Targets
- Transfer Reactions
- Two-Nucleon Transfer Reactions
- Years Living Radioisotopes 651425* -- Nuclear Properties & Reactions, A=20-38, Experimental-- Nuclear Reactions & Scattering-- (-1987)
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- Report No.: LBL-5077
- Grant Number: W-7405-ENG-48
- Digital Object Identifier: https://doi.org/10.2172/7216383
- Office of Scientific & Technical Information Report Number: 7216383
- Archival Resource Key: ark:/67531/metadc1443697
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- December 3, 1976
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- Feb. 10, 2019, 8:45 p.m.
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- March 7, 2019, 7:41 p.m.
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Weisenmiller, Robert Benjamin. Two-proton pickup studies with the (6Li,8B) reaction, thesis or dissertation, December 3, 1976; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc1443697/: accessed June 6, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.