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Probing r-Process Production of Nuclei Beyond ^(209)Bi with Gamma Rays

Qian, Y.-Z. and Vogel, P. and Wasserburg, G. J. (1999) Probing r-Process Production of Nuclei Beyond ^(209)Bi with Gamma Rays. Astrophysical Journal, 524 (1). pp. 213-219. ISSN 0004-637X. doi:10.1086/307805.

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We estimate gamma-ray fluxes due to the decay of nuclei beyond ^(209)Bi from a supernova or a supernova remnant assuming that the r-process occurs in supernovae. We find that a detector with a sensitivity of ~10^(-7) γ cm^(-2) s^(-1) at energies from ~40 keV to ~3 MeV may detect fluxes due to the decay of ^(226)Ra, ^(229)Th, ^(241)Am, ^(243)Am, ^(249)Cf, and ^(251)Cf in the newly discovered supernova remnant near Vela. In addition, such a detector may detect fluxes due to the decay of ^(227)Ac and ^(228)Ra produced in a future supernova at a distance of ~1 kpc. Because nuclei with mass numbers A > 209 are produced solely by the r-process, such detections are the best proof for a supernova r-process site. Further, they provide the most direct information on yields of progenitor nuclei with A > 209 at r-process freeze-out. Finally, detection of fluxes due to the decay of r-process nuclei over a range of masses from a supernova or a supernova remnant provides the opportunity to compare yields in a single supernova event with the solar r-process abundance pattern.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Vogel, P.0000-0003-0587-5466
Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 1999 American Astronomical Society. Received 1999 February 19; accepted 1999 May 28. We want to thank Steve Boggs, Ed Fenimore, Fiona Harrison, and Tom Prince for discussions. We also would like to thank the referee, Al Cameron, for helpful comments. This work was supported in part by the U.S. Department of Energy under contract W-7405-ENG-36 and grant DE-FG03- 88ER-40397, and by NASA under grant NAG 5-4076, Division Contribution 8595(1013). Y.-Z. Q. was supported by the J. Robert Oppenheimer Fellowship at Los Alamos National Laboratory.
Funding AgencyGrant Number
Department of Energy (DOE)W-7405-ENG-36
Department of Energy (DOE)DE-FG03-88ER-40397
Los Alamos National Laboratory J. Robert Oppenheimer FellowshipUNSPECIFIED
Subject Keywords:gamma rays: theory; nuclear reactions, nucleosynthesis, abundances; supernova remnants; supernovae: general
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences8595
Lunatic Asylum Lab1013
Issue or Number:1
Record Number:CaltechAUTHORS:20131210-113025756
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Official Citation: Probing r-Process Production of Nuclei Beyond 209Bi with Gamma Rays Y.-Z. Qian et al. 1999 ApJ 524 213
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42925
Deposited By: Ruth Sustaita
Deposited On:10 Dec 2013 21:04
Last Modified:10 Nov 2021 16:30

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