s -wave scattering lengths for the 7 Be+p system from an R -matrix analysis

作者： R. J. Livesay , U. Greife , J. C. Blackmon , D. W. Bardayan , K. A. Chipps

关键词:

摘要: The astrophysical $S$-factor for the radiative proton capture reaction on $^7$Be ($S_{17}$) at low energies is affected by $s$-wave scattering lengths. We report measurement of elastic and inelastic cross sections $^7$Be+p system in center-of-mass energy range 0.474 - 2.740 MeV angular 70$^\circ$- 150$^\circ$. A radioactive beam produced Oak Ridge National Laboratory's (ORNL) Holifield Radioactive Ion Beam Facility was accelerated bombarded a thin polypropylene (CH$_{2}$)$_\text n$ target. Scattered ions were detected segmented Silicon Detector Array. Using an $\textit{R}$-matrix analysis ORNL Louvain-la-Neuve section data, lengths channel spins 1 2 determined to be 17.34$^{+1.11}_{-1.33}$ -3.18$^{+0.55}_{-0.50}$ fm, respectively. uncertainty reported this work smaller factor 5-8 compared previous measurement, which may reduce overall $S_{17}$ zero energy. level structure $^8$B discussed based upon results from work. Evidence existence 0$^+$ 2$^+$ levels 1.9 2.21 MeV, respectively, observed.

参考文章(30)

D.R. Tilley, J.H. Kelley, J.L. Godwin, D.J. Millener, J.E. Purcell, C.G. Sheu, H.R. Weller, Energy levels of light nuclei A=8,9,10 Nuclear Physics. ,vol. 745, pp. 155- 362 ,(2004) , 10.1016/J.NUCLPHYSA.2004.09.059

J. P. Mitchell, G. V. Rogachev, E. D. Johnson, L. T. Baby, K. W. Kemper, A. M. Moro, P. Peplowski, A. S. Volya, I. Wiedenhöver, Structure of 8 B from elastic and inelastic 7 Be+ p scattering Physical Review C. ,vol. 87, pp. 054617- ,(2013) , 10.1103/PHYSREVC.87.054617

Carl R. Brune, Barry Davids, Radiative Capture Reactions in Astrophysics Annual Review of Nuclear and Particle Science. ,vol. 65, pp. 87- 112 ,(2015) , 10.1146/ANNUREV-NUCL-102014-022027

B Aharmim, SN Ahmed, AE Anthony, N Barros, EW Beier, Alain Bellerive, B Beltran, M Bergevin, SD Biller, K Boudjemline, MG Boulay, B Cai, YD Chan, D Chauhan, M Chen, BT Cleveland, GA Cox, X Dai, H Deng, JA Detwiler, M DiMarco, PJ Doe, G Doucas, P-L Drouin, FA Duncan, M Dunford, ED Earle, SR Elliott, HC Evans, GT Ewan, J Farine, H Fergani, F Fleurot, RJ Ford, JA Formaggio, N Gagnon, J TM Goon, K Graham, E Guillian, S Habib, RL Hahn, AL Hallin, ED Hallman, PJ Harvey, R Hazama, WJ Heintzelman, J Heise, RL Helmer, A Hime, C Howard, M Huang, P Jagam, B Jamieson, NA Jelley, M Jerkins, KJ Keeter, JR Klein, LL Kormos, M Kos, C Kraus, CB Krauss, A Kruger, T Kutter, CCM Kyba, R Lange, J Law, IT Lawson, KT Lesko, JR Leslie, JC Loach, R MacLellan, S Majerus, HB Mak, J Maneira, R Martin, N McCauley, AB McDonald, SR McGee, ML Miller, B Monreal, J Monroe, BG Nickel, AJ Noble, HM O’Keeffe, NS Oblath, RW Ollerhead, GD Orebi Gann, SM Oser, RA Ott, SJM Peeters, AWP Poon, G Prior, SD Reitzner, K Rielage, BC Robertson, RGH Robertson, RC Rosten, MH Schwendener, JA Secrest, SR Seibert, O Simard, JJ Simpson, P Skensved, TJ Sonley, LC Stonehill, G Tešić, N Tolich, T Tsui, R Van Berg, BA VanDevender, CJ Virtue, H Wan Chan Tseung, DL Wark, PJS Watson, J Wendland, N West, JF Wilkerson, JR Wilson, JM Wouters, A Wright, M Yeh, F Zhang, K Zuber, (SNO Collaboration), None, Combined analysis of all three phases of solar neutrino data from the Sudbury Neutrino Observatory Physical Review C. ,vol. 88, pp. 025501- ,(2013) , 10.1103/PHYSREVC.88.025501

Xilin Zhang, Kenneth M. Nollett, D.R. Phillips, Halo effective field theory constrains the solar 7Be + p → 8B + γ rate Physics Letters B. ,vol. 751, pp. 535- 540 ,(2015) , 10.1016/J.PHYSLETB.2015.11.005

C. R. Brune, Alternative parametrization of R-matrix theory Physical Review C. ,vol. 66, pp. 044611- ,(2002) , 10.1103/PHYSREVC.66.044611

E. G. Adelberger, A. García, R. G. Hamish Robertson, K. A. Snover, A. B. Balantekin, K. Heeger, M. J. Ramsey-Musolf, D. Bemmerer, A. Junghans, C. A. Bertulani, J.-W. Chen, H. Costantini, P. Prati, M. Couder, E. Uberseder, M. Wiescher, R. Cyburt, B. Davids, S. J. Freedman, M. Gai, D. Gazit, L. Gialanella, G. Imbriani, U. Greife, M. Hass, W. C. Haxton, T. Itahashi, K. Kubodera, K. Langanke, D. Leitner, M. Leitner, P. Vetter, L. Winslow, L. E. Marcucci, T. Motobayashi, A. Mukhamedzhanov, R. E. Tribble, Kenneth M. Nollett, F. M. Nunes, T.-S. Park, P. D. Parker, R. Schiavilla, E. C. Simpson, C. Spitaleri, F. Strieder, H.-P. Trautvetter, K. Suemmerer, S. Typel, Solar fusion cross sections. II. Theppchain and CNO cycles Reviews of Modern Physics. ,vol. 83, pp. 195- 245 ,(2011) , 10.1103/REVMODPHYS.83.195

H. A. Bethe, Theory of the Effective Range in Nuclear Scattering Physical Review. ,vol. 76, pp. 38- 50 ,(1949) , 10.1103/PHYSREV.76.38

H. Yamaguchi, Y. Wakabayashi, S. Kubono, G. Amadio, H. Fujikawa, T. Teranishi, A. Saito, J.J. He, S. Nishimura, Y. Togano, Y.K. Kwon, M. Niikura, N. Iwasa, K. Inafuku, L.H. Khiem, Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be Physics Letters B. ,vol. 672, pp. 230- 234 ,(2009) , 10.1016/J.PHYSLETB.2009.01.033

10.

J. Humblet, Bessel function expansions of Coulomb wave functions Journal of Mathematical Physics. ,vol. 26, pp. 656- 659 ,(1985) , 10.1063/1.526602

s -wave scattering lengths for the 7 Be+p system from an R -matrix analysis

来源期刊

我的账户

s -wave scattering lengths for the 7 Be+p system from an R -matrix analysis

来源期刊

相似文章 1

Structure of C 9 through proton resonance scattering with the Texas Active Target detector

我的账户