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Title: Direct measurement of astrophysically important resonances in K 38 ( p , γ ) Ca 39

Abstract

Classical novae are cataclysmic nuclear explosions occurring when a white dwarf in a binary system accretes hydrogen-rich material from its companion star. Novae are partially responsible for the galactic synthesis of a variety of nuclides up to the calcium (A ~ 40) region of the nuclear chart. Although the structure and dynamics of novae are thought to be relatively well understood, the predicted abundances of elements near the nucleosynthesis endpoint, in particular Ar and Ca, appear to sometimes be in disagreement with astronomical observations of the spectra of nova ejecta.

Authors:
 [1];  [2];  [3];  [4];  [5];  [2];  [5];  [6];  [3];  [3];  [6];  [3];  [6];  [3];  [7]
+ Show Author Affiliations
  1. Texas A & M Univ., College Station, TX (United States); TRIUMF, Vancouver, BC (Canada)
  2. Univ. of Surrey, Guildford (United Kingdom)
  3. TRIUMF, Vancouver, BC (Canada)
  4. TRIUMF, Vancouver, BC (Canada); Univ. of York (United Kingdom)
  5. McMaster Univ., Hamilton, ON (Canada)
  6. Colorado School of Mines, Golden, CO (United States)
  7. TRIUMF, Vancouver, BC (Canada); McGill Univ., Montreal, QC (Canada)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States); TRIUMF, Vancouver, BC (Canada)
Sponsoring Org.:
USDOE Office of Science (SC); Colorado School of Mines
OSTI Identifier:
1454855
Alternate Identifier(s):
OSTI ID: 1422000
Grant/Contract Number:  
FG02-93ER40789; FG02-93ER-40789
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Christian, G., Lotay, G., Ruiz, C., Akers, C., Burke, D. S., Catford, W. N., Chen, A. A., Connolly, D., Davids, B., Fallis, J., Hager, U., Hutcheon, D., Mahl, A., Rojas, A., and Sun, X. Direct measurement of astrophysically important resonances in K38(p,γ)Ca39. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.025802.
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Christian, G., Lotay, G., Ruiz, C., Akers, C., Burke, D. S., Catford, W. N., Chen, A. A., Connolly, D., Davids, B., Fallis, J., Hager, U., Hutcheon, D., Mahl, A., Rojas, A., & Sun, X. Direct measurement of astrophysically important resonances in K38(p,γ)Ca39. United States. https://doi.org/10.1103/PhysRevC.97.025802
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Christian, G., Lotay, G., Ruiz, C., Akers, C., Burke, D. S., Catford, W. N., Chen, A. A., Connolly, D., Davids, B., Fallis, J., Hager, U., Hutcheon, D., Mahl, A., Rojas, A., and Sun, X. Wed . "Direct measurement of astrophysically important resonances in K38(p,γ)Ca39". United States. https://doi.org/10.1103/PhysRevC.97.025802. https://www.osti.gov/servlets/purl/1454855.
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@article{osti_1454855,
title = {Direct measurement of astrophysically important resonances in K38(p,γ)Ca39},
author = {Christian, G. and Lotay, G. and Ruiz, C. and Akers, C. and Burke, D. S. and Catford, W. N. and Chen, A. A. and Connolly, D. and Davids, B. and Fallis, J. and Hager, U. and Hutcheon, D. and Mahl, A. and Rojas, A. and Sun, X.},
abstractNote = {Classical novae are cataclysmic nuclear explosions occurring when a white dwarf in a binary system accretes hydrogen-rich material from its companion star. Novae are partially responsible for the galactic synthesis of a variety of nuclides up to the calcium (A ~ 40) region of the nuclear chart. Although the structure and dynamics of novae are thought to be relatively well understood, the predicted abundances of elements near the nucleosynthesis endpoint, in particular Ar and Ca, appear to sometimes be in disagreement with astronomical observations of the spectra of nova ejecta.},
doi = {10.1103/PhysRevC.97.025802},
journal = {Physical Review C},
number = 2,
volume = 97,
place = {United States},
year = {2018},
month = {2}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1103/PhysRevC.97.025802
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Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) Sample rate vs. time curves measured in the NaI detector. The green filled circles correspond to a run where the beam rate was constant, while the blue filled squares correspond to a run where there were significant changes in the rate. The solid orange lines show themore » fit results used to extract the average beam intensities. (b) Average beam rate determined for each ∼1 hour run taken during the experiment. The filled circles, rectangles, and triangles denote each run’s beam energy, as indicated in the legend.« less
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