New pathways to bypass the O-15 waiting point

I. Stefan; F. de Oliveira Santos; M. G. Pellegriti; M. Angelique; J. C. Dalouzy; F. de Grancey; M. Fadil; S. Grevy; M. Lenhardt; A. Lewitowicz; A. Navin; L. Perrot; M. G. Saint Laurent; I. Ray; O. Sorlin; C. Stodel; J. C. Thomas; G. Dumitru; A. Buta; R. Borcea; F. Negoita; D. Pantelica; J. C. Angelique; E. Berthoumieux; A. Coc; J. Kiener; A. Lefebvre-Schuhl; V. Tatischeff; J. M. Daugas; O. Roig; T. Davinson; M. Stanoiu

New pathways to bypass the O-15 waiting point

I. Stefan
, F. de Oliveira Santos
, M. G. Pellegriti
, M. Angelique
, J. C. Dalouzy
, F. de Grancey
, M. Fadil
, S. Grevy
, M. Lenhardt
, A. Lewitowicz
, A. Navin
, L. Perrot
, M. G. Saint Laurent
, I. Ray
, O. Sorlin
, C. Stodel
, J. C. Thomas
, G. Dumitru
, A. Buta
, R. Borcea

F. Negoita, D. Pantelica, J. C. Angelique, E. Berthoumieux, A. Coc, J. Kiener, A. Lefebvre-Schuhl, V. Tatischeff, J. M. Daugas, O. Roig, T. Davinson, M. Stanoiu

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Two reactions O-15(p,beta(+))O-16 and O-15(p,gamma)(beta(+))O-16 are proposed as new pathways to bypass the O-15 waiting point in astrophysical context. The later reaction is found to have a surprisingly high cross section, approximately 10(10) times higher than the first reaction. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound F-16 low lying states, obtained using the H(O-15,p)O-15 reaction. The large (p,gamma)(beta(+)) cross section can be understood to arise from the more efficient feeding of the low energy wing of the ground state resonance by the gamma decay. The implications of the new reactions are discussed.

Original language	Undefined/Unknown
Title of host publication	Tours Symposium on Nuclear Physics VI
Editors	M Arnould, M Lewitowicz, H Emling, H Akimune, M Ohta, H Utsunomiya, T Wada, T Yamagata
Pages	155-163
Number of pages	9
Volume	891
Publication status	Published - 2007

Publication series

Name	AIP CONFERENCE PROCEEDINGS

Cite this

Stefan, I., Santos, F. D. O., Pellegriti, M. G., Angelique, M., Dalouzy, J. C., de Grancey, F., Fadil, M., Grevy, S., Lenhardt, M., Lewitowicz, A., Navin, A., Perrot, L., Saint Laurent, M. G., Ray, I., Sorlin, O., Stodel, C., Thomas, J. C., Dumitru, G., Buta, A., ... Stanoiu, M. (2007). New pathways to bypass the O-15 waiting point. In M. Arnould, M. Lewitowicz, H. Emling, H. Akimune, M. Ohta, H. Utsunomiya, T. Wada, & T. Yamagata (Eds.), Tours Symposium on Nuclear Physics VI (Vol. 891, pp. 155-163). (AIP CONFERENCE PROCEEDINGS).

@inproceedings{2c7aa77face448e787ed008eb29ff40b,

title = "New pathways to bypass the O-15 waiting point",

abstract = "Two reactions O-15(p,beta(+))O-16 and O-15(p,gamma)(beta(+))O-16 are proposed as new pathways to bypass the O-15 waiting point in astrophysical context. The later reaction is found to have a surprisingly high cross section, approximately 10(10) times higher than the first reaction. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound F-16 low lying states, obtained using the H(O-15,p)O-15 reaction. The large (p,gamma)(beta(+)) cross section can be understood to arise from the more efficient feeding of the low energy wing of the ground state resonance by the gamma decay. The implications of the new reactions are discussed.",

author = "I. Stefan and Santos, \{F. de Oliveira\} and Pellegriti, \{M. G.\} and M. Angelique and Dalouzy, \{J. C.\} and \{de Grancey\}, F. and M. Fadil and S. Grevy and M. Lenhardt and A. Lewitowicz and A. Navin and L. Perrot and \{Saint Laurent\}, \{M. G.\} and I. Ray and O. Sorlin and C. Stodel and Thomas, \{J. C.\} and G. Dumitru and A. Buta and R. Borcea and F. Negoita and D. Pantelica and Angelique, \{J. C.\} and E. Berthoumieux and A. Coc and J. Kiener and A. Lefebvre-Schuhl and V. Tatischeff and Daugas, \{J. M.\} and O. Roig and T. Davinson and M. Stanoiu",

note = "Tours Symposium on Nuclear Physics VI, Tours, FRANCE, SEP 05-08, 2006",

year = "2007",

language = "Undefined/Unknown",

volume = "891",

series = "AIP CONFERENCE PROCEEDINGS",

pages = "155--163",

editor = "M Arnould and M Lewitowicz and H Emling and H Akimune and M Ohta and H Utsunomiya and T Wada and T Yamagata",

booktitle = "Tours Symposium on Nuclear Physics VI",

}

Stefan, I, Santos, FDO, Pellegriti, MG, Angelique, M, Dalouzy, JC, de Grancey, F, Fadil, M, Grevy, S, Lenhardt, M, Lewitowicz, A, Navin, A, Perrot, L, Saint Laurent, MG, Ray, I, Sorlin, O, Stodel, C, Thomas, JC, Dumitru, G, Buta, A, Borcea, R, Negoita, F, Pantelica, D, Angelique, JC, Berthoumieux, E, Coc, A, Kiener, J, Lefebvre-Schuhl, A, Tatischeff, V, Daugas, JM, Roig, O, Davinson, T & Stanoiu, M 2007, New pathways to bypass the O-15 waiting point. in M Arnould, M Lewitowicz, H Emling, H Akimune, M Ohta, H Utsunomiya, T Wada & T Yamagata (eds), Tours Symposium on Nuclear Physics VI. vol. 891, AIP CONFERENCE PROCEEDINGS, pp. 155-163.

New pathways to bypass the O-15 waiting point. / Stefan, I.; Santos, F. de Oliveira; Pellegriti, M. G. et al.
Tours Symposium on Nuclear Physics VI. ed. / M Arnould; M Lewitowicz; H Emling; H Akimune; M Ohta; H Utsunomiya; T Wada; T Yamagata. Vol. 891 2007. p. 155-163 (AIP CONFERENCE PROCEEDINGS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - New pathways to bypass the O-15 waiting point

AU - Stefan, I.

AU - Santos, F. de Oliveira

AU - Pellegriti, M. G.

AU - Angelique, M.

AU - Dalouzy, J. C.

AU - de Grancey, F.

AU - Fadil, M.

AU - Grevy, S.

AU - Lenhardt, M.

AU - Lewitowicz, A.

AU - Navin, A.

AU - Perrot, L.

AU - Saint Laurent, M. G.

AU - Ray, I.

AU - Sorlin, O.

AU - Stodel, C.

AU - Thomas, J. C.

AU - Dumitru, G.

AU - Buta, A.

AU - Borcea, R.

AU - Negoita, F.

AU - Pantelica, D.

AU - Angelique, J. C.

AU - Berthoumieux, E.

AU - Coc, A.

AU - Kiener, J.

AU - Lefebvre-Schuhl, A.

AU - Tatischeff, V.

AU - Daugas, J. M.

AU - Roig, O.

AU - Davinson, T.

AU - Stanoiu, M.

N1 - Tours Symposium on Nuclear Physics VI, Tours, FRANCE, SEP 05-08, 2006

PY - 2007

Y1 - 2007

N2 - Two reactions O-15(p,beta(+))O-16 and O-15(p,gamma)(beta(+))O-16 are proposed as new pathways to bypass the O-15 waiting point in astrophysical context. The later reaction is found to have a surprisingly high cross section, approximately 10(10) times higher than the first reaction. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound F-16 low lying states, obtained using the H(O-15,p)O-15 reaction. The large (p,gamma)(beta(+)) cross section can be understood to arise from the more efficient feeding of the low energy wing of the ground state resonance by the gamma decay. The implications of the new reactions are discussed.

AB - Two reactions O-15(p,beta(+))O-16 and O-15(p,gamma)(beta(+))O-16 are proposed as new pathways to bypass the O-15 waiting point in astrophysical context. The later reaction is found to have a surprisingly high cross section, approximately 10(10) times higher than the first reaction. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound F-16 low lying states, obtained using the H(O-15,p)O-15 reaction. The large (p,gamma)(beta(+)) cross section can be understood to arise from the more efficient feeding of the low energy wing of the ground state resonance by the gamma decay. The implications of the new reactions are discussed.

M3 - Conference contribution

VL - 891

T3 - AIP CONFERENCE PROCEEDINGS

SP - 155

EP - 163

BT - Tours Symposium on Nuclear Physics VI

A2 - Arnould, M

A2 - Lewitowicz, M

A2 - Emling, H

A2 - Akimune, H

A2 - Ohta, M

A2 - Utsunomiya, H

A2 - Wada, T

A2 - Yamagata, T

ER -