Abstract
The recent observation of {sup 44}Ti radioactivity in the supernova remnant Cassiopeia A with the Compton Gamma Ray Observatory allows the determination of the absolute amount of {sup 44}Ti. This provides a test for current supernova models. The main uncertainty is the lifetime of {sup 44}Ti. We report a new measurement of the lifetime of {sup 44}Ti applying a novel technique. A mixed radioactive beam containing {sup 44}Ti as well as {sup 22}Na was implanted and the resulting {gamma}-activity was measured. This allowed the determination of the lifetime of {sup 44}Ti relative to the lifetime of {sup 22}Na, {tau} = (87.0 {+-} 1.9) y. With this lifetime, the {sup 44}Ti abundance agrees with theoretical predictions within the remaining observational uncertainties. (orig.)
Goerres, J;
Meissner, J;
Schatz, H;
Stech, E;
Tischhauser, P;
Wiescher, M;
[1]
Bazin, D;
Harkewicz, R;
Hellstroem, M;
Sherrill, B;
Steiner, M;
[2]
Boyd, R N;
[3]
Buchmann, L;
[4]
Hartmann, D H;
[5]
Hinnefeld, J D
[6]
- Univ. of Notre Dame, Notre Dame, IN (United States)
- Michigan State Univ., East Lansing, MI (United States)
- Ohio State Univ., Columbus, OH (United States)
- TRIUMF, Vancouver, BC (Canada)
- Clemson Univ., Clemson, SC (United States)
- Indiana Univ. South Bend, South Bend, IN (United States)
Citation Formats
Goerres, J, Meissner, J, Schatz, H, Stech, E, Tischhauser, P, Wiescher, M, Bazin, D, Harkewicz, R, Hellstroem, M, Sherrill, B, Steiner, M, Boyd, R N, Buchmann, L, Hartmann, D H, and Hinnefeld, J D.
Lifetime of {sup 44}Ti as probe for supernova models.
Germany: N. p.,
1998.
Web.
Goerres, J, Meissner, J, Schatz, H, Stech, E, Tischhauser, P, Wiescher, M, Bazin, D, Harkewicz, R, Hellstroem, M, Sherrill, B, Steiner, M, Boyd, R N, Buchmann, L, Hartmann, D H, & Hinnefeld, J D.
Lifetime of {sup 44}Ti as probe for supernova models.
Germany.
Goerres, J, Meissner, J, Schatz, H, Stech, E, Tischhauser, P, Wiescher, M, Bazin, D, Harkewicz, R, Hellstroem, M, Sherrill, B, Steiner, M, Boyd, R N, Buchmann, L, Hartmann, D H, and Hinnefeld, J D.
1998.
"Lifetime of {sup 44}Ti as probe for supernova models."
Germany.
@misc{etde_613405,
title = {Lifetime of {sup 44}Ti as probe for supernova models}
author = {Goerres, J, Meissner, J, Schatz, H, Stech, E, Tischhauser, P, Wiescher, M, Bazin, D, Harkewicz, R, Hellstroem, M, Sherrill, B, Steiner, M, Boyd, R N, Buchmann, L, Hartmann, D H, and Hinnefeld, J D}
abstractNote = {The recent observation of {sup 44}Ti radioactivity in the supernova remnant Cassiopeia A with the Compton Gamma Ray Observatory allows the determination of the absolute amount of {sup 44}Ti. This provides a test for current supernova models. The main uncertainty is the lifetime of {sup 44}Ti. We report a new measurement of the lifetime of {sup 44}Ti applying a novel technique. A mixed radioactive beam containing {sup 44}Ti as well as {sup 22}Na was implanted and the resulting {gamma}-activity was measured. This allowed the determination of the lifetime of {sup 44}Ti relative to the lifetime of {sup 22}Na, {tau} = (87.0 {+-} 1.9) y. With this lifetime, the {sup 44}Ti abundance agrees with theoretical predictions within the remaining observational uncertainties. (orig.)}
place = {Germany}
year = {1998}
month = {Jun}
}
title = {Lifetime of {sup 44}Ti as probe for supernova models}
author = {Goerres, J, Meissner, J, Schatz, H, Stech, E, Tischhauser, P, Wiescher, M, Bazin, D, Harkewicz, R, Hellstroem, M, Sherrill, B, Steiner, M, Boyd, R N, Buchmann, L, Hartmann, D H, and Hinnefeld, J D}
abstractNote = {The recent observation of {sup 44}Ti radioactivity in the supernova remnant Cassiopeia A with the Compton Gamma Ray Observatory allows the determination of the absolute amount of {sup 44}Ti. This provides a test for current supernova models. The main uncertainty is the lifetime of {sup 44}Ti. We report a new measurement of the lifetime of {sup 44}Ti applying a novel technique. A mixed radioactive beam containing {sup 44}Ti as well as {sup 22}Na was implanted and the resulting {gamma}-activity was measured. This allowed the determination of the lifetime of {sup 44}Ti relative to the lifetime of {sup 22}Na, {tau} = (87.0 {+-} 1.9) y. With this lifetime, the {sup 44}Ti abundance agrees with theoretical predictions within the remaining observational uncertainties. (orig.)}
place = {Germany}
year = {1998}
month = {Jun}
}