Neutron-rich nuclei produced at zero degrees in damped collisions induced by a beam of 18O on a 238U target
I. StefanInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceB. FornalInstitute of Nuclear Physics, PAN, 31-342 Kraków, PolandS. LeoniDipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, ItalyF. AzaiezInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceC. PortailInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceJ. C. ThomasCommissariat à l'Énergie Atomique et aux Énergies AlternativesА. В. КарповFlerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, RussiaD. AckermannGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceP. BednarczykInstitute of Nuclear Physics, PAN, 31-342 Kraków, PolandY. BlumenfeldInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceS. CălinescuHoria Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Bucharest-Magurele, RomaniaA. ChbihiGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceM. CiemałaInstitute of Nuclear Physics, PAN, 31-342 Kraków, PolandN. Cieplicka-OryńczakINFN sezione di Milano via Celoria 16, 20133, Milano, ItalyF. C. L. CrespiDipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, ItalyS. FranchooInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceF. HammacheInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, FranceŁ. W. IskraInstitute of Nuclear Physics, PAN, 31-342 Kraków, PolandB. JacquotGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceR. V. F. JanssensPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAO. KamalouGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceT. LauritsenPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAM. LewitowiczGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceL. OlivierInstitut de Physique Nuclaire, CNRS-IN2P3, Universit Paris-Sud, Universit Paris-Saclay, 91406 Orsay Cedex, FranceS. M. LukyanovFlerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, RussiaM. MacCormickUniversité Paris-SaclayA. MajInstitute of Nuclear Physics, PAN, 31-342 Krakw, PolandP. MariniCENBG, CNRS/IN2P3-Universit de Bordeaux, 19 Chemin du Solarium, 33175 Gradignan, FranceI. MatéaInstitut de Physique Nuclaire, CNRS-IN2P3, Universit Paris-Sud, Universit Paris-Saclay, 91406 Orsay Cedex, FranceM. A. NaumenkoFlerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, RussiaF. de Oliveira SantosPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAC. PetroneHoria Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Bucharest-Magurele, RomaniaYu. É. PenionzhkevichFlerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, RussiaF. RotaruHoria Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Bucharest-Magurele, RomaniaH. SavajolsGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceO. SorlinGANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, FranceM. StănoiuHoria Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Bucharest-Magurele, RomaniaB. SzpakInstitute of Nuclear Physics, PAN, 31-342 Krakw, PolandO. TarasovFlerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, RussiaD. VerneyInstitut de Physique Nuclaire, CNRS-IN2P3, Universit Paris-Sud, Universit Paris-Saclay, 91406 Orsay Cedex, France
ABI
Аннотация
Cross sections and corresponding momentum distributions have been measured for the first time at zero degrees for the exotic nuclei obtained from a beam of 18O at 8.5 MeV/A impinging on a 1 mg/cm2 238U target. Sizable cross sections were found for the production of exotic species arising from the neutron transfer and proton removal from the projectile. Comparisons of experimental results with calculations based on deep-inelastic reaction models, taking into account the particle evaporation process, indicate that zero degree is a scattering angle at which the differential reaction cross section for production of exotic nuclei is at its maximum. This result is important in view of the new generation of zero degrees spectrometers under construction, such as the S3 separator at GANIL, for example.
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