Universität zu Köln

Kirsebom, O. S., Tengblad, O., Lica, R., Munch, M., Riisager, K., Fynbo, H. O. U., Borge, M. J. G., Madurga, M., Marroquin, I., Andreyev, A. N., Berry, T. A., Christensen, E. R., Fernandez, P. Diaz, Doherty, D. T., Van Duppen, P., Fraile, L. M., Gallardo, M. C., Greenlees, P. T., Harkness-Brennan, L. J., Hubbard, N., Huyse, M., Jensen, J. H., Johansson, H., Jonson, B., Judson, D. S., Konki, J., Lazarus, I., Lund, M. V., Marginean, N., Marginean, R., Perea, A., Mihai, C., Negret, A., Page, R. D., Pucknell, V., Rahkila, P., Sorlin, O., Sotty, C., Swartz, J. A., Sorensen, H. B., Toernqvist, H., Vedia, V., Warr, N. and De Witte, H. (2018). First Accurate Normalization of the beta-delayed alpha Decay of N-16 and Implications for the C-12(alpha,gamma)O-16 Astrophysical Reaction Rate. Phys. Rev. Lett., 121 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

Full text not available from this repository.

Abstract

The C-12(alpha,gamma)O-16 reaction plays a central role in astrophysics, but its cross section at energies relevant for astrophysical applications is only poorly constrained by laboratory data. The reduced a width, gamma(11), of the bound 1(-) level in O-16 is particularly important to determine the cross section. The magnitude of gamma(11) is determined via sub-Coulomb a-transfer reactions or the beta-delayed a decay of N-16, but the latter approach is presently hampered by the lack of sufficiently precise data on the beta-decay branching ratios. Here we report improved branching ratios for the bound 1(-) level [b(beta,11) = (5.02 +/- 0.10) x 10(-2)] and for beta-delayed alpha emission [b(beta alpha) = (1.59 +/- 0.06) x 10(-5)]. Our value for b(beta alpha) is 33% larger than previously held, leading to a substantial increase in gamma(11). Our revised value for gamma(11) is in good agreement with the value obtained in a-transfer studies and the weighted average of the two gives a robust and precise determination of gamma(11), which provides significantly improved constraints on the C-12(alpha,gamma) cross section in the energy range relevant to hydrostatic He burning.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kirsebom, O. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tengblad, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lica, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Munch, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Riisager, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fynbo, H. O. U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borge, M. J. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Madurga, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marroquin, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andreyev, A. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Berry, T. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Christensen, E. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fernandez, P. Diaz UNSPECIFIED UNSPECIFIED UNSPECIFIED Doherty, D. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Duppen, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fraile, L. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gallardo, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Greenlees, P. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Harkness-Brennan, L. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hubbard, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huyse, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jensen, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johansson, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jonson, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Judson, D. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Konki, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lazarus, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lund, M. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Perea, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mihai, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Negret, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Page, R. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pucknell, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rahkila, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sorlin, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sotty, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Swartz, J. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sorensen, H. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Toernqvist, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vedia, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Warr, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED De Witte, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-169615
DOI:	10.1103/PhysRevLett.121.142701
Journal or Publication Title:	Phys. Rev. Lett.
Volume:	121
Number:	14
Date:	2018
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1079-7114
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CROSS-SECTION; ENERGY-LEVELS; LIGHT-NUCLEI; MATRIX; LEVEL; STATE Multiple languages Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16961