Abstract
The steady state abundance of Tc during the s-process is calculated, and a ratio of Nsub(s)(Tc)/Nsub(s)(Ba)=0.0162+-0.025 is obtained. It is pointed out that this figure sets an upper limit to the observed Tc abundance in stars. An observational number approaching this figure would imply that most of the s-process material observed in these stars is not primordial and that this material is cooled down rapidly to temperatures T/sub 8/<1 after synthesis. The latter is consequence of a strong temperature dependence of the /sup 99/Tc half-life which is calculated for T/sub 8/<5.
Citation Formats
Schatz, G.
Note on technetium in stars.
Germany: N. p.,
1983.
Web.
Schatz, G.
Note on technetium in stars.
Germany.
Schatz, G.
1983.
"Note on technetium in stars."
Germany.
@misc{etde_5760506,
title = {Note on technetium in stars}
author = {Schatz, G}
abstractNote = {The steady state abundance of Tc during the s-process is calculated, and a ratio of Nsub(s)(Tc)/Nsub(s)(Ba)=0.0162+-0.025 is obtained. It is pointed out that this figure sets an upper limit to the observed Tc abundance in stars. An observational number approaching this figure would imply that most of the s-process material observed in these stars is not primordial and that this material is cooled down rapidly to temperatures T/sub 8/<1 after synthesis. The latter is consequence of a strong temperature dependence of the /sup 99/Tc half-life which is calculated for T/sub 8/<5.}
journal = []
volume = {22:1/2}
journal type = {AC}
place = {Germany}
year = {1983}
month = {Jun}
}
title = {Note on technetium in stars}
author = {Schatz, G}
abstractNote = {The steady state abundance of Tc during the s-process is calculated, and a ratio of Nsub(s)(Tc)/Nsub(s)(Ba)=0.0162+-0.025 is obtained. It is pointed out that this figure sets an upper limit to the observed Tc abundance in stars. An observational number approaching this figure would imply that most of the s-process material observed in these stars is not primordial and that this material is cooled down rapidly to temperatures T/sub 8/<1 after synthesis. The latter is consequence of a strong temperature dependence of the /sup 99/Tc half-life which is calculated for T/sub 8/<5.}
journal = []
volume = {22:1/2}
journal type = {AC}
place = {Germany}
year = {1983}
month = {Jun}
}