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[show abstract]
[hide abstract]
ABSTRACT: The data for the 7Li + 9Be and 7Be + 9Be elastic scattering at the energies E
lab(7Li) = 15.75 , 24, 30, 34, 63 and 130MeV and E
lab(7Be) = 17 , 19 and 21MeV were analyzed within the optical model and coupled-reaction-channels method. The elastic and inelastic
scattering, reorientation of 7Li , 7Be and 9Be as well as most important transfer reactions were included in the coupled-channels scheme. The resulting 7Li and 7Be potentials are very similar and have the same energy dependence. The real potential for recently derived 8Be + 9Be scattering potentials is very similar to that for 7Li , 7Be but the imaginary part of the 8Be one has a much greater strength at longer range.
European Physical Journal A 05/2012; 41(1):31-37. · 2.19 Impact Factor
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A. T. Rudchik,
Yu. O. Shyrma,
K. W. Kemper,
K. Rusek,
E. I. Koshchy,
S. Kliczewski,
B. G. Novatsky, O. A. Ponkratenko,
E. Piasecki,
G. P. Romanyshyna,
Yu. M. Stepanenko,
I. Strojek,
S. B. Sakuta,
A. Budzanowski,
L. Głowacka,
I. Skwirczyńska,
R. Siudak,
J. Choiński,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: The angular distributions of the 14C + 18O elastic and inelastic scattering at the energy E
lab( ^18O) = 105 MeV were measured firstly. The data were analyzed within the optical model and the coupled-reaction-channels
method. The parameters of the 14C + 18O optical potential were deduced. The contributions of one- and two-step transfers of nucleons and clusters in the 14C + 18O elastic and inelastic scattering were calculated. The isotopic differences between the 14C + 18O and 12, 13, 14C + 18O potentials were studied.
European Physical Journal A 04/2012; 47(4):1-9. · 2.19 Impact Factor
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A. T. Rudchik,
Yu. O. Shyrma,
K. W. Kemper,
K. Rusek,
E. I. Koshchy,
S. Kliczewski,
B. G. Novatsky, O. A. Ponkratenko,
E. Piasecki,
G. P. Romanyshyna,
Yu. M. Stepanenko,
I. Strojek,
S. B. Sakuta,
A. Budzanowski,
L. Głowacka,
I. Skwirczyńska,
R. Siudak,
J. Choiński,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: Complete angular distributions of the 12C + 18O elastic and inelastic scattering were measured at the energy E
lab(18O) = 105 MeV (E
c.m. = 42MeV) . Comparison of these elastic-scattering data with those from previously measured 12C + 16O data show their large-angle cross-sections to differ by as much as a factor of 100 with the 16O data being the largest. These and the 12C + 18O scattering data taken from the literature at the energies E
c.m. = 12.9-56 MeV were analysed within the optical model and coupled-reaction-channels methods. Sets of Woods-Saxon 12C + 18O optical potential parameters were obtained and their energy dependence was deduced. A similar analysis was carried out for
12C + 16O where it was shown that over a wide energy range, the primary difference in the 16O and 18O scattering potentials is in their imaginary parts. The large-angle enhancement for the 12C + 18O elastic-scattering was shown to arise from the transfer of nucleons. The inelastic-scattering data were well described over
the entire angular range as arising from collective excitations of the states in the target and projectile nuclei.
European Physical Journal A 04/2012; 44(2):221-231. · 2.19 Impact Factor
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A. T. Rudchik,
K. W. Kemper,
A. A. Rudchik,
A. M. Crisp,
V. D. Chesnokova,
V. M. Kyryanchuk,
F. Maréchal,
O. A. Momotyuk, O. A. Ponkratenko,
B. T. Roeder,
K. Rusek
[show abstract]
[hide abstract]
ABSTRACT: The differential cross section angular distribution and the analyzing powers TT10,TT20, for 7Li+16O elastic scattering were measured at Elab(7Li⃗) = 42 MeV. These and previously published 7Li+16O scattering data measured at Ec.m. = 6.26−34.78 MeV were analyzed with the optical model and coupled-reaction channels (CRC) methods to determine the energy dependence of the parameters of the scattering potential. It was found that the optical model potentials are energy independent for 7Li laboratory bombarding energies above 28 MeV, except for a slight decrease in the real potential strength as the bombarding energy increases. The calculations presented show that the tensor analyzing power TT20 arises from a coherent combination of contributions from the ground-state reorientation and central scattering potential. The energy-dependent CRC potentials were shown to describe the data for the 16O(7Li,t)20Ne reaction.
Phys. Rev. C. 02/2007; 75(2).
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A. T. Rudchik,
V. O. Romanyshyn,
E. I. Koshchy,
A. Budzanowski,
K. W. Kemper,
K. Rusek,
V. D. Chesnokova,
J. Choiński,
B. Czech,
L. Głowacka,
S. Kliczewski,
V. M. Kyryanchuk,
S. Yu. Mezhevych,
A. V. Mokhnach,
O. A. Momotyuk, O. A. Ponkratenko,
R. Siudak,
I. Skwirczyńska,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: Angular distributions of the 7Li + 10B elastic and inelastic scattering were measured at the energy E
lab (10B) = 51 MeV (21 MeV c.m.). These and previously measured 7Li + 10B elastic-scattering data known at the 7Li-beam energies 24 MeV (14.1 MeV c.m.) and 39 MeV (22.94 MeV c.m.) were analyzed within the optical model and coupled-reaction
channels method to determine the energy dependence of the parameters of the scattering potential and find the difference of
these parameters from that of 7Li + 11B scattering. It was found that the 7Li + 11B potential parameters fail to describe the 7Li + 10B scattering data. The biggest difference is observed between the depths of the imaginary potentials that describe these scatterings.
European Physical Journal A 01/2007; 33(4):317-325. · 2.19 Impact Factor
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A. A. Rudchik,
A. T. Rudchik,
G. M. Kozeratska, O. A. Ponkratenko,
E. I. Koshchy,
A. Budzanowski,
B. Czech,
S. Kliczewski,
R. Siudak,
I. Skwirczyńska,
A. Szczurek,
S. Yu. Mezhevych,
K. W. Kemper,
J. Choiński,
T. Czosnyka,
L. Głowacka
[show abstract]
[hide abstract]
ABSTRACT: Angular distributions of 7Li+11B elastic and inelastic scattering were measured at Elab(11B) =44 MeV for the transitions to the ground and excited states of 7Li and 11B. The present data and data taken from the literature at Elab(7Li) =34 MeV were analyzed within the optical model and coupled-reaction-channels methods. Elastic and inelastic scattering, reorientations of 7Li and 11B, and the most important one- and two-step transfers were included in the channels-coupling scheme. The dependence of the 7Li+11B optical potential on kinetic energy was taken into account. The deformation parameters of 7Li and 11B and optical model parameters for interaction of these nuclei in ground and excited states were deduced. The contributions of one- and two-step transfers to the elastic and inelastic scattering were estimated.
Phys. Rev. C. 09/2005; 72(3).
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A.A. Rudchik,
A.T. Rudchik,
S. Kliczewski,
E.I. Koshchy, O.A. Ponkratenko,
K.W. Kemper,
K. Rusek,
A. Budzanowski,
J. Choiński,
B. Czech, [......],
V.D. Chesnokova,
L. Głowacka,
E. Kozik,
V.M. Kyryanchuk,
S.Yu. Mezhevych,
A.V. Mokhnach,
O.A. Momotyuk,
I. Skwirczyńska,
R. Siudak,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: Angular distributions of the 7Li + 18O elastic and inelastic scattering were measured at the energy Elab(18O) = 114 MeV (32 MeV c.m.) in inverse kinematics. This technique allowed both small and large angle data to be collected simultaneously. The data were analyzed within the optical model and coupled-reaction-channels method to determine the potential parameters of 7Li + 18O scattering and reaction channels dominating the scattering. 18O inelastic scattering deformation parameters were obtained. The present data show that the 7Li + 18O system has a much stronger absorption when compared to previously measured 7Li + 16O data. The derived optical model parameters clearly show the scattering difference between two systems.
Nuclear Physics A. 785:293-306.
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A.T. Rudchik,
Yu.O. Shyrma,
K.W. Kemper,
K. Rusek,
E.I. Koshchy,
S. Kliczewski,
B.G. Novatsky, O.A. Ponkratenko,
E. Piasecki,
G.P. Romanyshyna,
Yu.M. Stepanenko,
I. Strojek,
S.B. Sakuta,
A. Budzanowski,
L. Głowacka,
I. Skwirczyńska,
R. Siudak,
J. Choiński,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: Complete angular distributions of the 13C + 18O elastic and inelastic scattering were measured at the energy (Ec.m.=44.03 MeV). These and the 13C + 18O scattering data taken from the literature at the energies Ec.m.=6.29–13.94 MeV were analyzed within the optical model and coupled-reaction-channels methods. Sets of Woods–Saxon 13C + 18O optical potential parameters were obtained. The 13C + 18O scattering data and deduced potential parameters are compared with those for 12C + 18O and 13C + 16O previously measured and analyzed. The 13C + 18O elastic scattering is well described by potential scattering over its complete angular range. The 13C + 18O inelastic-scattering data were well described over the entire angular range as arising from collective excitations of the states in the target and projectile nuclei.
Nuclear Physics A. 852(1):1-14.
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A. T. Rudchik,
Yu. M. Stepanenko,
K. W. Kemper,
A. A. Rudchik, O. A. Ponkratenko,
E. I. Koshchy,
S. Kliczewski,
K. Rusek,
A. Budzanowski,
S. Yu. Mezhevych,
I. Skwirczyńska,
R. Siudak,
B. Czech,
A. Szczurek,
J. Choiński,
L. Głowacka
[show abstract]
[hide abstract]
ABSTRACT: New angular distributions for the 7Li(18O,17N)8Be reaction at an energy of Elab(18O)=114 MeV for the ground states of 8Be and 17N and the excited states of 17N were measured. These data and 18O(d,3He)17N reaction data taken at Ed=52 MeV were analyzed within the coupled-reaction-channels method using 7Li+18O and 18O + d optical potentials deduced from previous elastic and inelastic scattering results. Shell-model spectroscopic amplitudes were used in the analysis. Both reactions are dominated by single proton transfer. Calculations show that heavy-ion reactions of the type studied in this work can be used to identify final-state spins when measurements are carried to small angles.
Phys. Rev. C. 83(2).
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A. T. Rudchik,
Yu. O. Shyrma,
K. W. Kemper,
K. Rusek,
E. I. Koshchy,
S. Kliczewski,
B. G. Novatsky, O. A. Ponkratenko,
E. Piasecki,
G. P. Romanyshyna,
Yu. M. Stepanenko,
I. Strojek,
S. B. Sakuta,
A. Budzanowski,
L. Głowacka,
I. Skwirczyńska,
R. Siudak,
J. Choiński,
A. Szczurek
http://dx.doi.org/10.1140/epja/i2010-10953-7.
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A.T. Rudchik,
V.A. Ziman,
V.K. Chernievsky,
V.V. Lutsenko,
A.V. Mokhnach, O.A. Ponkratenko,
E.N. Dovzhenko,
Val.N. Pirnak,
E.I. Koshchy,
Yu.G. Mashkarov,
L. Głowacka,
J. Turkiewicz,
A. Budzanowski,
M. Makowska-Rzeszutko,
R. Siudak,
S.B. Sakuta
[show abstract]
[hide abstract]
ABSTRACT: The elastic-scattering, inelastic-scattering, single-nucleon-transfer and charge-exchange reaction cross sections in the collision of 116 MeV 14N ions on a 14C target were measured. The experimental data were analyzed using the coupled-reaction-channels method. Reasonable agreement between measured and calculated cross sections was obtained.
Nuclear Physics A.
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V. O. Romanyshyn,
A. T. Rudchik,
K. W. Kemper,
S. Kliczewski,
E. I. Koshchy, O. A. Ponkratenko,
K. Rusek,
A. Budzanowski,
J. Choinski,
B. Czech,
L. Głowacka,
S. Yu. Mezhevych,
Val. M. Pirnak,
V. A. Plujko,
A. A. Rudchik,
I. Skwirczyńska,
R. Siudak,
A. Szczurek
[show abstract]
[hide abstract]
ABSTRACT: New angular distributions for the 7Li(10B,9Be)8Be reaction at an energy of Elab(10B)=51 MeV for the ground and excited states of 8Be were analyzed within the coupled-reaction-channels method. The reactions are dominated by single proton transfer at forward angles except for that to the 8Be 11.35-MeV state, which requires multistep routes for its population. The 8Be+9Be potential parameters for ground and excited states of 8Be were deduced by fitting 7Li(10B,9Be)8Be and 10B(7Li,9Be)8Be reaction data and are compared with a previously determined 7Be+9Be potential. The 8Be+9Be real potential is very similar to that for 7Be+9Be, whereas the imaginary one for 8Be+9Be has a much greater spatial extent than that for 7Be+9Be.
Phys. Rev. C. 79(5).
