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Your search keyword '"Afanasieva, L A"' showing total 14 results
Start Over Author "Afanasieva, L A" Publication Type Academic Journals
14 results on '"Afanasieva, L A"'

3. Position-sensitive, fast ionization chambers

Author

Lai, J., Afanasieva, L., Blackmon, J.C., Deibel, C.M., Gardiner, H.E., Lauer, A., Linhardt, L.E., Macon, K.T., Rasco, B.C., Williams, C., Santiago-Gonzalez, D., Kuvin, S.A., Almaraz-Calderon, S., Baby, L.T., Baker, J., Belarge, J., Wiedenhöver, I., Need, E., Avila, M.L., Back, B.B., DiGiovine, B., and Hoffman, C.R.

Published
2018
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11. γ spectroscopy of states in 32Cl relevant for the 31S(p,γ)32Cl reaction rate.

Author

Afanasieva, L., Blackmon, J. C., Deibel, C. M., Lai, J., Linhardt, L. E., Rasco, B. C., Seweryniak, D., Alcorta, M., Carpenter, M. P., Clark, J. A., Hoffman, C. R., Janssens, R. V. F., and Zhu, S.

Subjects
*CHLORINE, *GAMMA ray spectrometry, *SULFUR
Abstract

Background: The 31S(p,γ)32Cl reaction becomes important for sulfur production in novae if the 31P(p,α)28Si reaction rate is somewhat greater than currently accepted. The rate of the 31S(p,γ)32Cl reaction is uncertain, primarily due to the properties of resonances at Ec.m.=156 and 549 keV. Purpose: We precisely determined the excitation energies of states in 32Cl through high-resolution γ spectroscopy including the two states most important for the 31S(p,γ)32Cl reaction at nova temperatures. Method: Excited states in 32Cl were populated using the 10B(24Mg,2n)32Cl reaction with a 24Mg beam from the ATLAS facility at Argonne National Laboratory. The reaction channel of interest was selected using recoils in the Fragment Mass Analyzer, and precise level energies were determined by detecting γ rays with Gammasphere. Results: We observed γ rays from the decay of six excited states in 32Cl. The excitation energies for two unbound levels at Ex=1738.1 (6) keV and 2130.5 (10) keV were determined and found to be in agreement with a previous high-precision measurement of the 32S(³He,t)32Cl reaction [1]. Conclusions: An updated 31S(p,γ)32Cl reaction rate is presented. With the excitation energies of important levels firmly established, the dominant uncertainty in the reaction rate at nova temperatures is due to the strength of the resonance corresponding to the 2131-keV state in 32Cl. [ABSTRACT FROM AUTHOR]

Published
2017
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12. Studying X-ray Burst Nucleosynthesis in the Laboratory.

Author

Deibel, C. M., Afanasieva, L., Albers, M., Alcorta, M., Almarez-Calderon, S., Bedoor, S., Bertone, P. F., Carnelli, P., Chen, A. A., Chen, J., Clark, J. A., Figueira, J. M., Greene, J. P., Hoffman, C. R., Irvine, D., Jiang, C. L., Kay, B. P., Lai, J., Lee, H. Y., and Lighthall, J. C.

Published
2012
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