Abstract
Using the {sup 27}Al({sup 3}He,t){sup 27}Si reaction, we have located and measured accurate excitation energies for seven states in {sup 27}Si between the {sup 26}Al+p threshold and the lowest observed {sup 26}Al(p,{gamma}){sup 27}Si resonance. By examining the mirror states in {sup 27}Al via the {sup 26}Mg({sup 3}He, d){sup 27}Al and {sup 26}Mg({alpha},t){sup 27}Al reactions, we find that in the {sup 26}Al+p channel there can be at most only one s-wave resonance that lies below the lowest directly observed resonance; this possible l=0 resonance most probably corresponds to either the 7589, 7557 or 7533 keV state in {sup 27}Si. The remaining six states are most probably formed via l{ge}2 proton capture. Upper limits for the reduced proton widths of these states have been used to estimate an upper limit for the {sup 26}Al(p,{gamma}){sup 27}Si thermonuclear reaction rate. (orig.).
Wang, T F;
[1]
Argonne National Lab., IL (USA));
Champagne, A E;
Hadden, J D;
[2]
Magnus, P V;
Smith, M S;
Howard, A J;
Parker, P D
[1]
- Yale Univ., New Haven, CT (USA). Wright Nuclear Structure Lab.
- Princeton Univ., NJ (USA). Dept. of Physics
Citation Formats
Wang, T F, Argonne National Lab., IL (USA)), Champagne, A E, Hadden, J D, Magnus, P V, Smith, M S, Howard, A J, and Parker, P D.
Proton threshold states in sup 27 Si and the destruction of sup 26 Al at low stellar temperatures.
Netherlands: N. p.,
1989.
Web.
doi:10.1016/0375-9474(89)90545-9.
Wang, T F, Argonne National Lab., IL (USA)), Champagne, A E, Hadden, J D, Magnus, P V, Smith, M S, Howard, A J, & Parker, P D.
Proton threshold states in sup 27 Si and the destruction of sup 26 Al at low stellar temperatures.
Netherlands.
https://doi.org/10.1016/0375-9474(89)90545-9
Wang, T F, Argonne National Lab., IL (USA)), Champagne, A E, Hadden, J D, Magnus, P V, Smith, M S, Howard, A J, and Parker, P D.
1989.
"Proton threshold states in sup 27 Si and the destruction of sup 26 Al at low stellar temperatures."
Netherlands.
https://doi.org/10.1016/0375-9474(89)90545-9.
@misc{etde_5591553,
title = {Proton threshold states in sup 27 Si and the destruction of sup 26 Al at low stellar temperatures}
author = {Wang, T F, Argonne National Lab., IL (USA)), Champagne, A E, Hadden, J D, Magnus, P V, Smith, M S, Howard, A J, and Parker, P D}
abstractNote = {Using the {sup 27}Al({sup 3}He,t){sup 27}Si reaction, we have located and measured accurate excitation energies for seven states in {sup 27}Si between the {sup 26}Al+p threshold and the lowest observed {sup 26}Al(p,{gamma}){sup 27}Si resonance. By examining the mirror states in {sup 27}Al via the {sup 26}Mg({sup 3}He, d){sup 27}Al and {sup 26}Mg({alpha},t){sup 27}Al reactions, we find that in the {sup 26}Al+p channel there can be at most only one s-wave resonance that lies below the lowest directly observed resonance; this possible l=0 resonance most probably corresponds to either the 7589, 7557 or 7533 keV state in {sup 27}Si. The remaining six states are most probably formed via l{ge}2 proton capture. Upper limits for the reduced proton widths of these states have been used to estimate an upper limit for the {sup 26}Al(p,{gamma}){sup 27}Si thermonuclear reaction rate. (orig.).}
doi = {10.1016/0375-9474(89)90545-9}
journal = []
volume = {499:3}
journal type = {AC}
place = {Netherlands}
year = {1989}
month = {Jul}
}
title = {Proton threshold states in sup 27 Si and the destruction of sup 26 Al at low stellar temperatures}
author = {Wang, T F, Argonne National Lab., IL (USA)), Champagne, A E, Hadden, J D, Magnus, P V, Smith, M S, Howard, A J, and Parker, P D}
abstractNote = {Using the {sup 27}Al({sup 3}He,t){sup 27}Si reaction, we have located and measured accurate excitation energies for seven states in {sup 27}Si between the {sup 26}Al+p threshold and the lowest observed {sup 26}Al(p,{gamma}){sup 27}Si resonance. By examining the mirror states in {sup 27}Al via the {sup 26}Mg({sup 3}He, d){sup 27}Al and {sup 26}Mg({alpha},t){sup 27}Al reactions, we find that in the {sup 26}Al+p channel there can be at most only one s-wave resonance that lies below the lowest directly observed resonance; this possible l=0 resonance most probably corresponds to either the 7589, 7557 or 7533 keV state in {sup 27}Si. The remaining six states are most probably formed via l{ge}2 proton capture. Upper limits for the reduced proton widths of these states have been used to estimate an upper limit for the {sup 26}Al(p,{gamma}){sup 27}Si thermonuclear reaction rate. (orig.).}
doi = {10.1016/0375-9474(89)90545-9}
journal = []
volume = {499:3}
journal type = {AC}
place = {Netherlands}
year = {1989}
month = {Jul}
}