Zobrazeno 1 - 10
of 172
pro vyhledávání: '"F.C. Barker"'
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 768:241-252
The measured energy dependence of the 7Be( p , γ )8B S factor is fitted better by the cluster-model calculation of Descouvemont and Baye than by other models. It is suggested here that this may be connected with the cluster model predicting too high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::921383dcfa0fe0f15cf6c8026201a669
https://doi.org/10.1016/j.nuclphysa.2006.01.010
https://doi.org/10.1016/j.nuclphysa.2006.01.010
Autor:
Ulli Köster, Sami Rinta-Antila, H. O. U. Fynbo, F.C. Barker, Olof Tengblad, Thomas Nilsson, Joakim Cederkäll, Henrik B. Jeppesen, K. Riisager, B. R. Fulton, Göran Hugo Nyman, K. Wilhelmsen, Juha Äystö, C. Aa. Diget, M. Turrión, María José García Borge, Mikael Meister, Valentin Fedosseev, L. M. Fraile, Yolanda Prezado, Björn Jonson
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
16 pages, 1 table, 10 figures.-- PACS nrs.: 23.40.-s; 26.20.+f; 27.20.+n.-- Printed version published Oct 3, 2005.
The β-delayed triple-α particle decay of B-12 has been measured with a setup that favours coincidence detection. A broad state i
The β-delayed triple-α particle decay of B-12 has been measured with a setup that favours coincidence detection. A broad state i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74d637049f23f80a3af76d6727899377
https://doi.org/10.1016/j.nuclphysa.2005.05.159
https://doi.org/10.1016/j.nuclphysa.2005.05.159
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 741:42-51
The lowest observed resonance in each of 9 He and 10 He is narrow, with widths 0.10±0.06 MeV and 0.3±0.2 MeV, respectively. For 9 He, the calculated width is an order of magnitude larger. For 10 He, the calculated width is appreciably larger if the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::429ff433bc5a63ea89ac08ff7c91dfc8
https://doi.org/10.1016/j.nuclphysa.2004.06.001
https://doi.org/10.1016/j.nuclphysa.2004.06.001
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 707:277-300
Values of the electron-screening potential derived from previous fits to measurements of low-energy cross sections of nuclear reactions have generally been much larger than the values estimated from model calculations. Here we refit the data using so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aff48410f16577e63cead144ebe0df42
https://doi.org/10.1016/s0375-9474(02)00921-1
https://doi.org/10.1016/s0375-9474(02)00921-1
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 697:915-934
Data for the 9 Be(p, γ ) 10 B reaction with proton energies up to 1800 keV are fitted using R -matrix formulae that include channel contributions where appropriate. The data include values of the astrophysical S factor, the branching ratios for γ -
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::755438df6145ec0f9de47ec878ae82f9
https://doi.org/10.1016/s0375-9474(01)01262-3
https://doi.org/10.1016/s0375-9474(01)01262-3
Autor:
F.C. Barker, Y. Kondō
Publikováno v:
Nuclear Physics A. 688:959-974
Data for the 9 Be ( p ,α) 6 Li and 9 Be ( p , d ) 8 Be reactions with proton energies up to 700 keV are fitted using R -matrix formulae. The data include values of the astrophysical S factors and of the angular-distribution and analysing-power coeff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12585c9b051eac799532fe0df2bc6db3
https://doi.org/10.1016/s0375-9474(00)00590-x
https://doi.org/10.1016/s0375-9474(00)00590-x
Autor:
F.C. Barker, A. M. Mukhamedzhanov
Publikováno v:
Nuclear Physics A. 673:526-532
A 2 − level at 3.0 MeV in 8 B has been suggested from 7 Be + p elastic scattering measurements. The effect of such a level on the low-energy 7 Be ( p ,γ) 8 B S factor is discussed, using R -matrix formulae with parameter values chosen to fit 7 Li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34446d206af7198593c206941e8f10fc
https://doi.org/10.1016/s0375-9474(00)00134-2
https://doi.org/10.1016/s0375-9474(00)00134-2
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 660:249-254
A calculation of the E2 component of the 7 Be(p, γ ) 8 B cross section atlow energies, using R-matrix formulae that include channel contributions,finds the resonant strength due to the 1 + first excited state of 8 B to be appreciably smaller than wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0870101b64145f350d93316c423ff7df
https://doi.org/10.1016/s0375-9474(99)00389-9
https://doi.org/10.1016/s0375-9474(99)00389-9
Autor:
F.C. Barker
Publikováno v:
Nuclear Physics A. 637:576-582
In a recent paper, Iliadis [Nucl. Phys. A 618 (1997) 166] has estimated values of proton single-particle reduced widths for unbound states, for a range of target masses, bombarding energies, nl values and channel radii. These are “observed” value
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aad17584528ffbab5bef55c854647788
https://doi.org/10.1016/s0375-9474(98)00333-9
https://doi.org/10.1016/s0375-9474(98)00333-9
Autor:
H. O. U. Fynbo, F.C. Barker
Publikováno v:
Nuclear Physics A. 776:52-54
A recent measurement of the γ-ray spectrum following 9Li β-decay indicates a population of the 1 / 2 + first-excited state of 9Be too strong to be consistent with other measurements.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c0c338beaad5773fda9a8b755adfb4c
https://doi.org/10.1016/j.nuclphysa.2006.07.035
https://doi.org/10.1016/j.nuclphysa.2006.07.035