New limits for the F-18(p,alpha)O-15 rate in Novae

Kozub, RL; Bardayan, DW; Batchelder, JC; Blackmon, JC; Brune, CR; Champagne, AE; Cizewski, JA; Davinson, T; Greife, U; Gross, CJ; Jewett, CC; Livesay, RJ; Ma, Z; Moazen, BH; Nesaraja, CD; Scott, JP; Sahin, LATİFE; Shapira, D; Smith, MS; Thomas, JS; Woods, PJ

doi:10.1016/j.nuclphysa.2005.05.135

New limits for the F-18(p,alpha)O-15 rate in Novae

Kozub R., Bardayan D., Batchelder J., Blackmon J., Brune C., Champagne A., ...More

NUCLEAR PHYSICS A, vol.758, 2005 (SCI-Expanded, Scopus)

Publication Type: Article / Article
Volume: 758
Publication Date: 2005
Doi Number: 10.1016/j.nuclphysa.2005.05.135
Journal Name: NUCLEAR PHYSICS A
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Istanbul University Affiliated: No

Abstract

The degree to which the (p, gamma) and (p, alpha) reactions destroy F-18 at temperatures similar to 14x10(8) K is important for understanding the synthesis of nuclei in nova explosions and for using the long-lived radionuclide F-18, a target of gamma ray astronomy, as a diagnostic of nova mechanisms. The reactions are dominated by low-lying proton resonances near the F-18+p threshold (E-x=6.411 MeV in Ne-19). To gain further information about these resonances, we have used the d (F-18,p)F-19 neutron transfer reaction to selectively populate corresponding mirror states in F-19. The results would suggest F-18(p, gamma)Ne-19 and F-18(p, alpha)O-15 reaction rates that are 2-3 times lower than reported previously.