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352 results on '"MICZAIKA, A"'

3. How Can the BISE Community Promote Tech Startups?

Author

Massachusetts Institute of Technology. Department of Mechanical Engineering, Haag, Steffi, Chase, Christina, Miczaika, Gesa, Möslein, Kathrin, Steininger, Dennis, Zarnekow, Rüdiger, van Bohemen, Joris, Massachusetts Institute of Technology. Department of Mechanical Engineering, Haag, Steffi, Chase, Christina, Miczaika, Gesa, Möslein, Kathrin, Steininger, Dennis, Zarnekow, Rüdiger, and van Bohemen, Joris

Published
2023

8. First Evidence for Direct CP Violation

Author

Burkhardt, H., Clarke, P., Coward, D., Cundy, D., Doble, N., Gatignon, L., Gibson, V., Hagelberg, R., Kesseler, G., van der Lans, J., Mannelli, I., Miczaika, T., Schaffer, A. C., Steinberger, J., Taureg, H., Wahl, H., Youngman, C., Dietrich, G., Heinen, W., Black, R., Candlin, D. J., Muir, J., Peach, K. J., Pijlgroms, B., Shipsey, I. P., Stephenson, W., Blümer, H., Kasemann, M., Kleinknecht, K., Panzer, B., Renk, B., Augé, E., Chase, R. L., Corti, M., Fournier, D., Heusse, P., Iconomidou-Fayard, L., Lutz, A. M., Sander, H. G., Bigi, A., Calvetti, M., Carosi, R., Casali, R., Cerri, C., Gargani, G., Massa, E., Nappi, A., Pierazzini, G. M., Becker, C., Heyland, D., Holder, M., Quast, G., Rost, M., Weihs, W., Zech, G., Kotthaus, Rainer, editor, and Kühn, Johann H., editor

Published
1989
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9. SEARCH FOR THE DECAY KL-]PI-OE+E

Author

Barr, G, Clarke, P, Coward, D, Cundy, D, Doble, N, Gatignon, L, Gibson, V, Hagelberg, R, Kesseler, G, Vanderlans, J, Miczaika, T, Nelson, H, Steinberger, J, Taureg, H, Wahl, H, Youngman, C, Black, R, Candlin, D, Muir, J, Peach, K, Pijlgroms, B, Shipsey, I, Stephenson, W, Blumer, H, and Heinz, R

Abstract

A search for the decay KL→π0e+e- has been performed at the CERN SPS. One candidate event has been found, compatible with an expected background of 1.5 events. The corresponding upper limit for the branching ration is Γ(KL→π0e+e-) Γ(KL → all)

Published
2016

10. Observation of the decay Ks → 2γ and measurement of the decay rates KL → 2γ and KS → 2γ

Author

R. Carosi, G. Quast, M. Hassan, A. Bigi, I. Mannelli, G. Kesseler, Ian Shipsey, J. Muir, D. J. Candlin, N. Doble, D.C. Cundy, L. Bertanza, G. Dietrich, H. D. Wahl, B. Renk, Konrad Kleinknecht, Arthur Schaffer, H. G. Sander, H. Burkhardt, M. Holder, R. Chase, E. Massa, Peter Clarke, D. Heyland, M. Corti, C. Youngman, P. Steffen, R. Hagelberg, A. M. Lutz, Ph Heusse, W. Heinen, B. Panzer, R. Black, A. Nappi, W. Weihs, G. M. Pierazzini, Ken Peach, J. Steinberger, E. Auge, L. Gatignon, W. Stephenson, Clemens Becker, C. Cerri, M. Calvetti, J. van der Lans, M. Kasemann, H. Blümer, B. Pijlgroms, M. Rost, G. Zech, Daniel Fournier, H. Taureg, R. Casali, and T. Miczaika

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract

The decay rates of K L → 2γ and K S → 2γ have been measured at the CERN SPS. The results are Γ (K L →2 γ )/ χ (K L →2 π 0 )=0.632±0.004±0.008 and Γ (K S →2 γ )/ Γ (K L →2 γ )=2.3 ±1.0±0.4. This is the first observation of K S →2γ decays.

Published
2016

14. Target asymmetry measurement of deuteron photodisintegration at a photon energy of 550 MeV

Author

Althoff, K. H., Anton, G., Bock, B., Bour, D., Erbs, P., Ferber, W., Gelhausen, H., Härtel, U., Havenith, W., Jahnen, T., Kaufmann, H. P., Kaul, O., Lücking, B., Menze, D., Meyer, W., Miczaika, T., Rennings, K., Riechert, H., Roderburg, E., Ruhm, W., Schenuit, E., Schilling, E., Schwille, W., Sternal, G., Sundermann, D., Thiel, W., Thiesmeyer, D., and Wagener, K.

Published
1984
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22. Excitation and fission decay of 232Th by inelastic scattering of 17O at 84 MeV/u

Author

J.P. Garron, R. Liguori-Neto, A. van der Woude, T. Suomijärvi, C. Cabot, B. Fernandez, F. Auger, A. Miczaika, S. K. Mark, A. Gillibert, J. Gastebois, Roy A. Lacey, A.M. van den Berg, N. Frascaria, N. Alamanos, Y. Blumenfeld, P. Roussel-Chomaz, R. Turcotte, J. Xing, J. A. Scarpaci, J. Barrette, and J. C. Roynette

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Cold fission, Cluster decay, Fission, Isoscalar, Nuclear Theory, Resonance, Inelastic scattering, Nuclear physics, Quadrupole, Atomic physics, Nuclear Experiment
Abstract

Inelastic scattering of 84 MeV/u 17 O projectiles has been used to excite the giant resonances (GR) in 232 Th. The deduced parameters (width, energy, EWSR) of the isoscalar giant quadrupole resonance are in agreement with the known systematics. The observed giant monopole resonance strength, 100% of the EWSR, is consistent with other recent experimental results using heavy-ion projectiles. Strength is also observed at high excitation energy. The fission probability of GR in 232 Th has been measured by detecting the fission fragments in coincidence with the inelastically scattered particles. A structure is observed in the fission coincidence spectrum around 10 MeV, which can be attributed to the fission decay of giant resonances. The measured fission probability is consistent with statistical decay of the GQR.

Published
1994
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23. FIRST EVIDENCE FOR DIRECT CP VIOLATION

Author

BURKHARDT, H., primary, CLARKE, P., additional, COWARD, D., additional, CUNDY, D., additional, DOBLE, N., additional, GATIGNON, L., additional, GIBSON, V., additional, HAGELBERG, R., additional, KESSELER, G., additional, VAN DER LANS, J., additional, MANNELLI, I., additional, MICZAIKA, T., additional, SCHAFFER, A.C., additional, STEINBERGER, J., additional, TAUREG, H., additional, WAHL, H., additional, YOUNGMAN, C., additional, DIETRICH, G., additional, HEINEN, W., additional, BLACK, R., additional, CANDLIN, D.J., additional, MUIR, J., additional, PEACH, K.J., additional, PIJLGROMS, B., additional, SHIPSEY, I.P., additional, STEPHENSON, W., additional, BLÜMER, H., additional, KASEMANN, M., additional, KLEINKNECHT, K., additional, PANZER, B., additional, RENK, B., additional, AUGÉ, E., additional, CHASE, R.L., additional, CORTI, M., additional, FOURNIER, D., additional, HEUSSE, P., additional, ICONOMIDOU-FAYARD, L., additional, LUTZ, A.M., additional, SANDER, H.G., additional, BIGI, A., additional, CALVETTI, M., additional, CAROSI, R., additional, CASALI, R., additional, CERRI, C., additional, GARGANI, G., additional, MASSA, E., additional, NAPPI, A., additional, PIERAZZINI, G.M., additional, BECKER, C., additional, HEYLAND, D., additional, HOLDER, M., additional, QUAST, G., additional, ROST, M., additional, WEIHS, W., additional, and ZECH, G., additional

Published
1989
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29. Excitation and fission decay of $^{232}$Th by inelastic scattering of $^{17}$O at 84 MeV/u

Author

Cabot, C., Barrette, J., Mark, S.K., Turcotte, R., Xing, J., Alamanos, N., Auger, F., Fernandez, B., Gastebois, J., Gillibert, A., Lacey, R., Liguori-Neto, R., Roussel-Chomaz, P., Miczaika, A., Blumenfeld, Y., Frascaria, N., Garron, J.P., Roynette, J.C., Scarpaci, J.A., Suomijarvi, T., Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1994

30. EXCITATION OF GIANT-RESONANCES IN PB-208, SN-120, ZR-90 AND NI-60 BY 84 MEV/NUCLEON O-17 IONS

Author

NETO, RL, ROUSSELCHOMAZ, P, ROCHAIS, L, ALAMANOS, N, AUGER, F, GASTEBOIS, J, GILLIBERT, A, LACEY, R, MICZAIKA, A, PIERROUTSAKOU, D, BARRETTE, J, MARK, SK, TURCOTTE, R, BLUMENFELD, Y, FRASCARIA, N, GARRON, JP, ROYNETTE, JC, SCARPACI, JA, SUOMIJARVI, T, VANDERWOUDE, A, VANDENBERG, AM, KVI - Center for Advanced Radiation Technology, and Research unit Astroparticle Physics

Subjects
ENERGY OCTUPOLE RESONANCE, PB-208 DEDUCED B(LAMBDA), MONOPOLE RESONANCE, MEASURED SIGMA(THETA), MULTIPOLE RESONANCES, Nuclear Theory, ZR-90, PB-208(O-17,O-17), E=1435 MEV, INELASTIC ALPHA-SCATTERING, QUADRUPOLE RESONANCE, (O-17,O-17'), ISOSPIN CHARACTER, PROTON-SCATTERING, COULOMB-EXCITATION, NI-60, DEDUCED MODEL PARAMETERS, HEXADECAPOLE STRENGTH, EVEN-EVEN NUCLIDES, PHOTON DECAY, GIANT MONOPOLE, SN-120
Abstract

Elastic and inelastic scattering of 1435 MeV 170 ions on Pb-208, Sn-120, Zr-90 and Ni-60 have been measured. Hindrance in the excitation of the first 3- states is observed. Parameters of the isoscalar giant monopole and quadrupole resonances are obtained. The quadrupole resonance exhausts approximately 55% of the energy-weighted sum rule while the observed monopole resonance corresponds to more than 100% of the sum rule. Strength is also observed at high excitation energy in all targets.

Published
1993

31. Excitation of giant resonances in $^{208}$Pb $^{120}$Sn $^{90}$Zr and $^{60}$Ni by 84 MeV/nucleon $^{17}$O ions

Author

A. Gillibert, J. Barrette, B. Fernandez, S. K. Mark, Y. Blumenfeld, A. van der Woude, P. Roussel-Chomaz, J.P. Garron, J. Gastebois, J. A. Scarpaci, J.C. Roynette, R. Liguori Neto, A. Miczaika, T. Suomijärvi, N. Frascaria, N. Alamanos, F. Auger, R. Turcotte, Roy A. Lacey, A.M. van den Berg, L. Rochais, D. Pierroutsakou, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Isoscalar, Nuclear Theory, Resonance, Coulomb excitation, Inelastic scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, 0103 physical sciences, Quadrupole, Sum rule in quantum mechanics, Atomic physics, 010306 general physics, Excitation
Abstract

Elastic and inelastic scattering of 1435 MeV 17O ions on 208Pb, 120Sn, 90Zr and 60Ni have been measured. Hindrance in the excitation of the first 3− states is observed. Parameters of the isoscalar giant monopole and quadrupole resonances are obtained. The quadrupole resonance exhausts ∼ 55% of the energy-weighted sum rule while the observed monopole resonance corresponds to more than 100% of the sum rule. Strength is also observed at high excitation energy in all targets.

Published
1993
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32. Electric isovector nuclear response from $^{13}C$ induced charge-exchange reactions

Author

B. Berthier, W. von Oertzen, J. Barrette, H. G. Bohlen, S. Kubono, A. Miczaika, Ph. A. Martin, B. Fernandez, E. Stiliaris, Corinne Berat, Antonio Villari, M. Buenerd, J-Y. Hostachy, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, Light nucleus, Isovector, 010308 nuclear & particles physics, Nuclear Theory, Electrostatic induction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Resonance (particle physics), Dipole, Angular distribution, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Excitation
Abstract

The reaction (13C, 13N) has been studied at 50 MeV/u on a set of nuclear targets including 12C, 40Ca, 58,60Ni, 90Zr, 120Sn and 208Pb. Excitation of ΔT2 = 1 giant dipole resonance has been observed in light nuclei (A⩽ 60) and corresponding angular distribution have been measured. A broad structure is observed at excitation energy above the GDR in nuclei with A⩾ 60. Angular-distribution measurements of elastic-scattering cross sections are also reported on 12C and 58Ni, as well as excitation of low-lying states in 12B. Microscopic DWBA analysis of the results is presented. Some results on the (13C, 13B) reaction are also presented.

Published
1993
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33. Excitation of giant resonances through inelastic scattering of $^{17}$ O at 84 Mev/u. Fission decay of giant resonances

Author

Cabot, C., Barrette, J., Mark, S.K., Trucotte, R., Xing, J., Alamanos, N., Auger, F., Fernandez, B., Gastebois, J., Gillibert, A., Lacey, R., Liguori-Neto, R., Roussel-Chomaz, P., Miczaika, A., Blumenfeld, Y., Frascaria, N., Garon, J.P., Roynette, J.C., Scarpaci, J.A., Suomijarvi, T., Van Der Woude, A., Van Den Berg, A.M., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1991

34. Proton stripping induced by $^{13}$C at 50 Mev/nucleon on $^{12}$C, $^{40}$Ca and $^{58}$Ni

Author

J-Y. Hostachy, W. von Oertzen, M. Buenerd, B. Berthier, E. Stiliaris, H. G. Bohlen, B. Fernandez, Corinne Berat, J. Barette, J. Chauvin, A. Miczaika, D. Lebrun, M. Braeunig, W. Mittig, Ph. A. Martin, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Spectrometer, Stripping (chemistry), Proton, 010308 nuclear & particles physics, Continuum (design consultancy), Absolute value, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

The article looks back on the 183 workshops and briefing sessions of the 15 annual UKSG conferences from 1990 to 2004. The content of this particular form of professional training reflects the development of the professional environment, interests and activities of librarians, especially the emergence of the digital library. Nine major subjects of information and debate are identified: human resource management, new software, acquisition of e-serials, legal aspects, emerging standards, usage statistics, library/vendor relationship, document delivery, and publishing. An analysis of attendance and some remarks on specific features of the sessions complete this “historical study”.

Published
1990
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35. Transfer and fragmentation reactions of $^{14}$N at 60 MeV/u

Author

W. Lahmer, W. von Oertzen, R. Glasow, J.C. Roynette, N. Frascaria, J.P. Garron, W. Weller, R. Santo, J.C. Jacmart, D. Grzonka, H. G. Bohlen, Y. Blumenfeld, A. Miczaika, Institut de Physique Nucléaire d'Orsay (IPNO), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Projectile, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Spectral line, Nuclear physics, Fragmentation (mass spectrometry), Isotopes of carbon, 0103 physical sciences, Dissipative system, Incident energy, Nuclear fusion, Atomic physics, 010306 general physics
Abstract

Inclusive energy spectra and cross sections of reaction products close to the14N projectile (11C,12C,13C,15N and15O) have been measured in the angular rangeθL =1.2°–4.2° at an incident energy of 60 MeV/u for five different target nuclei (12C,27Al,58Ni,90Zr and208Pb). Two components are found to be systematically present in the energy spectra of the carbon isotopes, the first similar to that observed at relativistic energies and the second shifted down in energy characteristic for a very dissipative process. The dependence of the differential and integrated cross sections on the target mass indicates that the two-body final channels (14N,13C), (14N,15N) and (14N,15O) are strongly correlated to the fragmentation channels.

Published
1990

38. Excitation and fission decay of 232Th by inelastic scattering of 17O at 84 MeV/u

Author

Cabot, C., primary, Barrette, J., additional, Mark, S.K., additional, Turcotte, R., additional, Xing, J., additional, Alamanos, N., additional, Auger, F., additional, Fernandez, B., additional, Gastebois, J., additional, Gillibert, A., additional, Lacey, R., additional, Liguori-Neto, R., additional, Roussel-Chomaz, P., additional, Miczaika, A., additional, Blumenfeld, Y., additional, Frascaria, N., additional, Garron, J.P., additional, Roynette, J.C., additional, Scarpaci, J.A., additional, Suomijarvi, T., additional, Van der Woude, A., additional, and Van den Berg, A.M., additional

Published
1994
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39. Excitation of giant resonances in 208Pb, 120Sn, 90Zr and 60Ni by 84 MeV/nucleon 17O ions

Author

Liguori Neto, R., primary, Roussel-Chomaz, P., additional, Rochais, L., additional, Alamanos, N., additional, Auger, F., additional, Fernandez, B., additional, Gastebois, J., additional, Gillibert, A., additional, Lacey, R., additional, Miczaika, A., additional, Pierroutsakou, D., additional, Barrette, J., additional, Mark, S.K., additional, Turcotte, R., additional, Blumenfeld, Y., additional, Frascaria, N., additional, Garron, J.P., additional, Roynette, J.C., additional, Scarpaci, J.A., additional, Suomijärvi, T., additional, Van der Woude, A., additional, and Van den Berg, A.M., additional

Published
1993
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40. Proton stripping induced by 13C at 50 MeV/nucleon on 12C, 40Ca and 58Ni

Author

Braeunig, M., primary, Von Oertzen, W., additional, Bohlen, H.G., additional, Miczaika, A., additional, Stiliaris, E., additional, Buenerd, M., additional, Berat, C., additional, Chauvin, J., additional, Lebrun, D., additional, Hostachy, J.Y., additional, Martin, Ph., additional, Mittig, W., additional, Barette, J., additional, Berthier, B., additional, and Fernandez, B., additional

Published
1990
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41. Search for a neutral Higgs particle in the decay sequence KL0→π0H0 and H0→e+e−

Author

Barr, G.D., primary, Clarke, P., additional, Coward, D., additional, Cundy, D., additional, Doble, N., additional, Gatignon, L., additional, Gibson, V., additional, Grafström, P., additional, Hagelberg, R., additional, Kesseler, G., additional, van der Lans, J., additional, Miczaika, T., additional, Nelson, H.N., additional, Taureg, H., additional, Wahl, H., additional, Youngman, C., additional, Black, R., additional, Candlin, D.J., additional, Muir, J., additional, Peach, K.J., additional, Pijlgroms, B., additional, Shipsey, I.P., additional, Stephenson, W., additional, Blümer, H., additional, Heinz, R., additional, Kasemann, M., additional, Kleinknecht, K., additional, Mayer, P., additional, Panzer, B., additional, Renk, B., additional, Rohrer, H., additional, Augé, E., additional, Chase, R.L., additional, Corti, M., additional, Fournier, D., additional, Heusse, P., additional, Iconomidou-Fayard, L., additional, Harrus, I., additional, Lutz, A.M., additional, Sander, H.G., additional, Schaffer, A.C., additional, Bertanza, L., additional, Bigi, A., additional, Calafiura, P., additional, Calvetti, M., additional, Carosi, R., additional, Casali, R., additional, Cerri, C., additional, Mannelli, I., additional, Nappi, A., additional, Pierazzini, G.M., additional, Burkhardt, H., additional, Holder, M., additional, Quast, G., additional, Rost, M., additional, Weihs, W., additional, and Zech, G., additional

Published
1990
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42. Refractive scattering and the nuclear rainbow in the interaction ofC withC at 20MeV/N.

Author

Bohlen, H., Chen, X., Cramer, J., Fröbrich, P., Gebauer, B., Lettau, H., Miczaika, A., Oertzen, W., Ulrich, R., and Wilpert, T.

Abstract

The elastic and inelastic scattering and the neutron transfer have been measured for the systemsC +C andC +C at 20MeV/N up to θ= 60° with the Q3D -spectrometer. The angular distributions of the elastic scattering show an enhanced cross section at angles larger than 40°. It can be identified as refractive scattering with the clear signature of a nuclear rainbow. L-cut-off calculations show that these contributions come from L-values which are significantly lower than the grazing L-value. The deflection function has a broad minimum in this L-range which is typical for rainbow scattering. The S-matrix is decomposed by a phenomenological parametrization into a refractive and a diffractive part. The interference of these amplitudes plays an important role in the rainbow enhancement. The spatial localization of the refractive scattering is deduced from the turning points of the corresponding trajectories; a localization between 2.5 fm and 4 fm is found. Semi-classical calculations with complex trajectories in the single-turning-point approximation show good agreement with the quantummechanical calculations. Refractive contributions are not observed in the inelastic scattering. This can be explained by reducing the strength of the conventional collective form factor in the internal region. In contrast to this the enhancement at large angles is seen in the one-neutron transfer channels where the refractive scattering is dominant. This is the first observation of such contributions to heavy-ion transfer reactions. [ABSTRACT FROM AUTHOR]

Published
1985
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