New measurement of the B-11(p,alpha(0))Be-8 bare-nucleus S(E) factor via the Trojan horse method


Autoria(s): Lamia, L.; Spitaleri, C.; Burjan, V.; Carlin Filho, Nelson; Cherubini, S.; Crucilla, V.; Munhoz, Marcelo Gameiro; Gimenez Del Santo, M.; Gulino, M.; Hons, Z.; Kiss, G. G.; Kroha, V.; Kubono, S.; La Cognata, M.; Li, C.; Mrazek, J.; Mukhamedzhanov, A.; Pizzone, R. G.; Puglia, S. M. R.; Wen, Q.; Rapisarda, G. G.; Rolfs, C.; Romano, S.; Sergi, M. L.; Somorjai, E.; Souza, F. A.; Szanto de Toledo, Alejandro; Tabacaru, G.; Tumino, A.; Wakabayashi, Y.; Yamaguchi, H.; Zhou, S-H
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

21/10/2013

21/10/2013

2012

Resumo

A new measurement of the B-11(p,alpha(0))Be-8 has been performed applying the Trojan horse method (THM) to the H-2(B-11,alpha Be-8(0))n quasi-free reaction induced at a laboratory energy of 27 MeV. The astrophysical S(E) factor has been extracted from similar to 600 keV down to zero energy by means of an improved data analysis technique and it has been compared with direct data available in the literature. The range investigated here overlaps with the energy region of the light element LiBeB stellar burning and with that of future aneutronic fusion power plants using the B-11+p fuel cycle. The new investigation described here confirms the preliminary results obtained in the recent TH works. The origin of the discrepancy between the direct estimate of the B-11(p,alpha(0))Be-8 S(E)-factor at zero energy and that from a previous THM investigation is quantitatively corroborated. The results obtained here support, within the experimental uncertainties, the low-energy S(E)-factor extrapolation and the value of the electron screening potential deduced from direct measurements.

Italian Ministry of the University [RBFR082838]

Italian Ministry of the University

Czech MSMT [LC 07050]

Czech MSMT

Czech Academy

Czech Academy [M10480902]

GACR [P203/10/310]

GACR

US Department of Energy

US Department of Energy [DE-FG02-93ER40773, DE-FG52-06NA26207]

NSF [PHY-0852653]

NSF

Identificador

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, BRISTOL, v. 39, n. 1, supl. 1, Part 1, pp. 16720-16733, JAN, 2012

0954-3899

http://www.producao.usp.br/handle/BDPI/35238

10.1088/0954-3899/39/1/015106

http://dx.doi.org/10.1088/0954-3899/39/1/015106

Idioma(s)

eng

Publicador

IOP PUBLISHING LTD

BRISTOL

Relação

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS

Direitos

restrictedAccess

Copyright IOP PUBLISHING LTD

Palavras-Chave #IMPULSE-APPROXIMATION CALCULATIONS #ENERGY CROSS-SECTIONS #BORON DEPLETION #F-DWARF #BERYLLIUM #LI-6 #ASTROPHYSICS #RELEVANT #ALPHA #STARS #PHYSICS, NUCLEAR #PHYSICS, PARTICLES & FIELDS
Tipo

article

original article

publishedVersion