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Title: Study of the Al m 26 ( d , p ) Al 27 Reaction and the Influence of the Al 26 0 + Isomer on the Destruction of Al 26 in the Galaxy

Abstract

The existence of 26Al (t 1/2 = 7.17 × 10 5 yr) in the interstellar medium provides a direct confirmation of ongoing nucleosynthesis in the Galaxy. The presence of a low-lying 0 + isomer ( 26Al m), however, severely complicates the astrophysical calculations. Here we present for the first time a study of the 26Al m (d, p) 27 Al reaction using an isomeric 26Al beam. The selectivity of this reaction allowed the study of ℓ = 0 transfers to T = 1/2, and T = 3/2 states in 27Al . Mirror symmetry arguments were then used to constrain the 26Al m (p,γ) 27Si reaction rate and provide an experimentally determined upper limit of the rate for the destruction of isomeric 26Al via radiative proton capture reactions, which is expected to dominate the destruction path of 26Al m in asymptotic giant branch stars, classical novae, and core collapse supernovae.

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [1];  [2];  [2];  [5];  [2];  [2];  [6];  [2];  [2]
  1. Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  3. McMaster Univ., Hamilton, ON (Canada). Dept. of Physics and Astronomy
  4. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  5. Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics
  6. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1394547
Alternate Identifier(s):
OSTI ID: 1375518
Grant/Contract Number:  
AC02-06CH11357; FG02-96ER40978
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 7; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Almaraz-Calderon, S., Rehm, K. E., Gerken, N., Avila, M. L., Kay, B. P., Talwar, R., Ayangeakaa, A. D., Bottoni, S., Chen, A. A., Deibel, C. M., Dickerson, C., Hanselman, K., Hoffman, C. R., Jiang, C. L., Kuvin, S. A., Nusair, O., Pardo, R. C., Santiago-Gonzalez, D., Sethi, J., and Ugalde, C. Study of the Alm26(d,p)Al27 Reaction and the Influence of the Al26 0+ Isomer on the Destruction of Al26 in the Galaxy. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.072701.
Almaraz-Calderon, S., Rehm, K. E., Gerken, N., Avila, M. L., Kay, B. P., Talwar, R., Ayangeakaa, A. D., Bottoni, S., Chen, A. A., Deibel, C. M., Dickerson, C., Hanselman, K., Hoffman, C. R., Jiang, C. L., Kuvin, S. A., Nusair, O., Pardo, R. C., Santiago-Gonzalez, D., Sethi, J., & Ugalde, C. Study of the Alm26(d,p)Al27 Reaction and the Influence of the Al26 0+ Isomer on the Destruction of Al26 in the Galaxy. United States. doi:10.1103/PhysRevLett.119.072701.
Almaraz-Calderon, S., Rehm, K. E., Gerken, N., Avila, M. L., Kay, B. P., Talwar, R., Ayangeakaa, A. D., Bottoni, S., Chen, A. A., Deibel, C. M., Dickerson, C., Hanselman, K., Hoffman, C. R., Jiang, C. L., Kuvin, S. A., Nusair, O., Pardo, R. C., Santiago-Gonzalez, D., Sethi, J., and Ugalde, C. Thu . "Study of the Alm26(d,p)Al27 Reaction and the Influence of the Al26 0+ Isomer on the Destruction of Al26 in the Galaxy". United States. doi:10.1103/PhysRevLett.119.072701. https://www.osti.gov/servlets/purl/1394547.
@article{osti_1394547,
title = {Study of the Alm26(d,p)Al27 Reaction and the Influence of the Al26 0+ Isomer on the Destruction of Al26 in the Galaxy},
author = {Almaraz-Calderon, S. and Rehm, K. E. and Gerken, N. and Avila, M. L. and Kay, B. P. and Talwar, R. and Ayangeakaa, A. D. and Bottoni, S. and Chen, A. A. and Deibel, C. M. and Dickerson, C. and Hanselman, K. and Hoffman, C. R. and Jiang, C. L. and Kuvin, S. A. and Nusair, O. and Pardo, R. C. and Santiago-Gonzalez, D. and Sethi, J. and Ugalde, C.},
abstractNote = {The existence of 26Al (t1/2 = 7.17 × 105 yr) in the interstellar medium provides a direct confirmation of ongoing nucleosynthesis in the Galaxy. The presence of a low-lying 0+ isomer (26Alm), however, severely complicates the astrophysical calculations. Here we present for the first time a study of the 26Alm (d, p)27 Al reaction using an isomeric 26Al beam. The selectivity of this reaction allowed the study of ℓ = 0 transfers to T = 1/2, and T = 3/2 states in 27Al . Mirror symmetry arguments were then used to constrain the 26Al m (p,γ) 27Si reaction rate and provide an experimentally determined upper limit of the rate for the destruction of isomeric 26Al via radiative proton capture reactions, which is expected to dominate the destruction path of 26Alm in asymptotic giant branch stars, classical novae, and core collapse supernovae.},
doi = {10.1103/PhysRevLett.119.072701},
journal = {Physical Review Letters},
number = 7,
volume = 119,
place = {United States},
year = {2017},
month = {8}
}

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