First proton-transfer study of 18F + p resonances relevant for novae

被引：33

作者：

Adekola, A. S. ^{[1
,2
]}

Bardayan, D. W. ^{[3
]}

Blackmon, J. C. ^{[3
]}

Brune, C. R. ^{[1
]}

Chae, K. Y. ^{[4
]}

Domizioli, C. ^{[4
]}

Greife, U. ^{[5
]}

Heinen, Z. ^{[1
]}

Hornish, M. J. ^{[1
]}

Jones, K. L. ^{[2
]}

Kozub, R. L. ^{[6
]}

Livesay, R. J. ^{[5
]}

Ma, Z. ^{[4
]}

Massey, T. N. ^{[1
]}

Moazen, B. ^{[4
]}

Nesaraja, C. D. ^{[3
]}

Pain, S. D. ^{[2
]}

Shriner, J. F., Jr. ^{[6
]}

Smith, N. D. ^{[6
]}

Smith, M. S. ^{[3
]}

Thomas, J. S. ^{[2
]}

Visser, D. W. ^{[7
]}

Voinov, A. V. ^{[1
]}

机构：

[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[3] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[5] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

[6] Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA

[7] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 05期

基金：

美国国家科学基金会;

关键词：

GAMMA-RAY EMISSION; REACTION-RATES; NOVA; CYGNI;

D O I：

10.1103/PhysRevC.83.052801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The F-18(p, alpha)O-15 reaction is the predominant destruction mechanism in novae of the radionuclide F-18, a target of gamma-ray observatories. Thus, its rate is important for understanding F-18 production in novae. We have studied resonances in the F-18 + p system by making a measurement of a proton-transfer reaction F-18(d, n). We have observed 15 Ne-19 levels, 5 of which are below the proton threshold, including a subthreshold state, which has significant l(p) = 0 strength. Our data provide a direct determination of the spectroscopic strength of these states and new constraints on their spins and parities, thereby resolving a controversy, which involves the 8- and 38-keV resonances. The F-18(p, alpha)O-15 reaction rate is reevaluated, which takes the subthreshold resonance and other new information determined in this experiment into account.

引用

页数：5

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