Astrophysically Important 19Ne States Studied with the 2H(18F,alpha+15O)n Reaction

Conference · Thu Jan 01 04:00:00 EST 2009

OSTI ID:953196

Adekola, Aderemi S ^[1]; Bardayan, Daniel W ^[1]; Blackmon, Jeff C ^[1]; Brune, C. ^[2]; Chae, K. Y. ^[3]; Champagne, A. E. ^[4]; Domizioli, Carlo P ^[1]; Greife, U. ^[5]; Heinen, Z. ^[2]; Hornish, M. ^[2]; Johnson, Micah ^[1]; Jones, K. L. ^[3]; Kapler, R. ^[3]; Livesay, Jake ^[1]; Ma, Zhanwen ^[1]; Massey, T. ^[2]; Moazen, Brian ^[3]; Nesaraja, Caroline D ^[1]; Pain, Steven D ^[1]; Thomas, J. S. ^[6] ; Smith, Nathan A ^[1]; Smith, Michael Scott ^[1]; Visser, D. W. ^[4]; Voinov, A. ^[2]

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1. ORNL
2. Ohio University
3. University of Tennessee, Knoxville (UTK)
4. University of North Carolina, Chapel Hill
5. Colorado School of Mines, Golden
6. Rutgers University

The nuclear structure of {sup 19}Ne near the proton threshold is of interest for understanding the rates of proton-induced reactions on {sup 18}F in novae. Analogues for several states in the mirror nucleus {sup 19}F have not yet been identified in {sup 19}Ne indicating the level structure of {sup 19}Ne in this region is incomplete. The {sup 18}F(d;n){sup 19}Ne and {sup 18}F(d,p){sup 19}F reactions have been measured simultaneously at E{sub c.m.} = 14.9 MeV. The experiments were performed at the Holifield Radioactive Ion Beam Facility (HRIBF) of Oak Ridge National Laboratory (ORNL) by bombarding a 720-mg/cm{sub 2} CD{sub 2} target with a radioactive {sup 18}F beam. The {sup 19}Ne states of interest near the proton threshold decay by breakup into a and {sup 15}O particles. These decay products were detected in coincidence with position-sensitive E-{Delta}E silicon telescopes. The {alpha} and {sup 15}N particles from the break up of the mirror nucleus {sup 19}F were also measured with these detectors. Particle identification, coincidence, and Q-value requirements enable us to distinguish the reaction of interest from other reactions. The reconstruction of relative energy of the detected particles reveals the excited states of {sup 19}Ne and {sup 19}F which are populated. The neutron (proton) angular distributions for states in {sup 19}Ne ({sup 19}F) were extracted using momentum conservation. The observed states in {sup 19}Ne and {sup 19}F will be presented.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 953196
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
DAUGHTER PRODUCTS
DECAY
EXCITED STATES
MIRRORS
NEUTRONS
NOVAE
NUCLEAR STRUCTURE
NUCLEI
ORNL
PARTICLE IDENTIFICATION
PROTONS
Q-VALUE
RADIOACTIVE ION BEAMS
SILICON
TARGETS
TELESCOPES
UNIVERSE