Search

Your search keyword '"Roussel-Chomaz, Patricia"' showing total 20 results
Start Over Author "Roussel-Chomaz, Patricia"
20 results on '"Roussel-Chomaz, Patricia"'

1. The $^{8}$He and $^{10}$He spectra studied in the $(t$,$p)$ reaction

Author

Golovkov, M.S., Grigorenko, Leonid, Ter-Akopian, Gurgen, Fomichev, Andrey, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Pang, Danyang, Chudoba, V., Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., 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), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-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)-Centre National de la Recherche Scientifique (CNRS), Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Lion, Michel, Flerov Laboratory of Nuclear reaction (FLNR), JINR, and RIKEN Nishina Center (for Accelerator-Based Science)

Subjects
Resonance states, Physique, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], FOS: Physical sciences, Neutron halo, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 6He, Tritium gas target, 25.10.+s, 24.50.+g, 25.55.Hp, 25.60.Je, 21.60.Gx, 8He beams, Soft dipole mode, Hyperspherical harmonic method, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The low-lying spectra of 8He and 10He nuclei were studied in the 3H(6He, p)8He and 3H(8He, p)10He transfer reactions. The 0+ ground state (g.s.) of 8He and excited states, 2+ at 3.6 - 3.9 MeV and (1+) at 5.3 - 5.5 MeV, were populated with cross sections of 200, 100-250, and 90-125 μb/sr, respectively. Some evidence for a 8He state at about 7.5 MeV was obtained. We discuss a possible nature of the near-threshold anomaly above 2.14 MeV in 8He and relate it to the population of a 1- continuum (soft dipole excitation) with a peak value at about 3 MeV. The lowest energy group of events in the 10He spectrum was observed at ∼3 MeV with a cross section of ∼ 140 μb / sr. We argue that this result is consistent with the previously reported observation of 10He providing the new 10He g.s. position at about 3 MeV. © 2008 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2008
Full Text
View/download PDF

2. Properties of very n-rich He isotopes

Author

Fomichev, Andrey, Grigorenko, Leonid, Golovkov, M.S., Ter-Akopian, Gurgen, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Chudoba, V., Pang, Danyang, Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Fomichev, Andrey, Grigorenko, Leonid, Golovkov, M.S., Ter-Akopian, Gurgen, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Chudoba, V., Pang, Danyang, Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

Low-energy spectra of the 8,10He nuclei were investigated in the (t, p) -type reactions at small centre-of-mass angles using ̃ 25 AMeV beams of 6He and 8He nuclei. The 0+ ground state (g. s.) of 8He and excited states, 2+ at 3. 6-3. 9MeV and (1+) at 5. 3-5. 5MeV, were populated with cross-sections of 200, 100-250, and 90-125μb/sr, respectively. To account for a near-threshold anomaly observed in the 8He spectrum the population of a 1- continuum (soft dipole excitation) was considered. The lowest-energy group of events in the 10He spectrum was observed at ̃ 3 MeV with a cross-section of ̃ 140 μb/sr. This result is consistent with the previously reported observation of 10He providing a new g. s. position for 10He at about 3MeV. © Societá Italiana di Fisica / Springer-Verlag 2009., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

3. The 8He and 10He spectra studied in the (t, p) reaction

Author

Golovkov, M.S., Grigorenko, Leonid, Ter-Akopian, Gurgen, Fomichev, Andrey, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Pang, Danyang, Chudoba, V., Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Golovkov, M.S., Grigorenko, Leonid, Ter-Akopian, Gurgen, Fomichev, Andrey, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Pang, Danyang, Chudoba, V., Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

The low-lying spectra of 8He and 10He nuclei were studied in the 3H(6He, p)8He and 3H(8He, p)10He transfer reactions. The 0+ ground state (g.s.) of 8He and excited states, 2+ at 3.6 - 3.9 MeV and (1+) at 5.3 - 5.5 MeV, were populated with cross sections of 200, 100-250, and 90-125 μb/sr, respectively. Some evidence for a 8He state at about 7.5 MeV was obtained. We discuss a possible nature of the near-threshold anomaly above 2.14 MeV in 8He and relate it to the population of a 1- continuum (soft dipole excitation) with a peak value at about 3 MeV. The lowest energy group of events in the 10He spectrum was observed at ∼3 MeV with a cross section of ∼ 140 μb / sr. We argue that this result is consistent with the previously reported observation of 10He providing the new 10He g.s. position at about 3 MeV. © 2008 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

4. Soft dipole mode in 8He

Author

Grigorenko, Leonid, Golovkov, M.S., Ter-Akopian, Gurgen, Fomichev, Andrey, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Pang, Danyang, Chudoba, V., Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Grigorenko, Leonid, Golovkov, M.S., Ter-Akopian, Gurgen, Fomichev, Andrey, Oganessian, Yu.Ts., Gorshkov, V.A., Krupko, S.A., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Pang, Danyang, Chudoba, V., Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

The low-lying spectrum of 8He was studied in the 3H(6He, p)8He transfer reaction for small center of mass angles. The 0+ ground state (g.s.) of 8He and excited states, 2+ at 3.6-3.9 MeV and (1+) at 5.3-5.5 MeV, were populated with cross sections of 200, 100-250, and 90-125 μb/sr. Some evidence for the excited state at about 7.5 MeV can be found in the data. The possible nature of the near-threshold anomaly above 2.14 MeV in 8He is related to the population of a 1- continuum (soft dipole excitation) with a peak energy value at about 3 MeV. This assumption can probably resolve the problem of a large uncertainty existing in the experimental data on the 8He 2+ state energy. © Pleiades Publishing, Ltd. 2009., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

5. Low-energy spectra of 8He and 10He studied in (t,p) type reactions in inverse kinematics

Author

Chudoba, V., Fomichev, Andrey, Grigorenko, Leonid, Golovkov, M.S., Gorshkov, V.A., Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Pang, Danyang, Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Vinogradov, Yu, Perevozchikov, V.V., Grishechkin, S.K., Chudoba, V., Fomichev, Andrey, Grigorenko, Leonid, Golovkov, M.S., Gorshkov, V.A., Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Pang, Danyang, Korsheninnikov, A.A., Kuzmin, E.A., Nikolskii, Yu, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Ninane, A., Hanappe, Francis, Stuttge, Louise, Yukhimchuk, Arkadiy, Vinogradov, Yu, Perevozchikov, V.V., and Grishechkin, S.K.

Abstract

Missing mass spectra for 8He and 10He obtained in the reactions 3H( 6He, p) 8He and 3H( 8He, p) 10He, respectively, are presented., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

6. Quest for the 10He nucleus

Author

Chudoba, V., Fomichev, Andrey, Golovkov, M.S., Gorshkov, Alexander A.V., Gorshkov, V.A., Grigorenko, Leonid, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Kuzmin, Vadim, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Chudoba, V., Fomichev, Andrey, Golovkov, M.S., Gorshkov, Alexander A.V., Gorshkov, V.A., Grigorenko, Leonid, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Kuzmin, Vadim, Novatskii, B.G., Stepanov, D.N., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., and Stuttge, Louise

Abstract

The spectrum of 10He was studied by means of the 3H(8He, p)10He reaction at a laboratory energy of 25 MeV/A and small center-of-mass angles. Missing mass spectrum of 10He was derived from the obtained p-8He coincidence. A resolution of 0.7 MeV was achieved in this spectrum for the measured 10He energy. Most likely, a well isolated group of 10 events detected between 2 and 5 MeV and showing a maximum at about 3 MeV in the spectrum of the present work exhibits the 10He g.s. resonance. © EDP Sciences and Springer 2008., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2008

7. Correlation studies of the H5 spectrum

Author

Golovkov, M.S., Grigorenko, Leonid, Fomichev, Andrey, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Itkis, Mikhail, Denikin, A. S., Bogatchev, A.A., Kondratiev, N.A., Kozulin, E.M., Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Golovkov, M.S., Grigorenko, Leonid, Fomichev, Andrey, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Itkis, Mikhail, Denikin, A. S., Bogatchev, A.A., Kondratiev, N.A., Kozulin, E.M., Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

The nuclear system H5 was studied using the H3(t,p)H5 transfer reaction at a laboratory energy of 57.7 MeV and small center of mass angles. The energy and angular correlations among the H5 decay fragments were obtained by complete kinematical reconstruction. A broad structure in the H5 missing mass spectrum above 2.5 MeV with a typical width of several MeV was identified as a mixture of 3/2+ and 5/2+ states. Analysis of interference patterns observed in the measured angular correlations disclosed the 1/2+ ground state of H5 concealed in the smooth missing mass spectrum. The deduced values for the resonance energy and width are Eg.s. 1.8 MeV and Γg.s. 1.3 MeV. The estimated cross sections for population of the ground state and the doublet of excited states at θc.m.=5°-10° are 150±50 μb/sr and 4.6±2 mb/sr, respectively. © 2005 The American Physical Society., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2005

8. New insights into the resonance states of 5H and 5He

Author

Ter-Akopian, Gurgen, Fomichev, Andrey, Golovkov, M.S., Grigorenko, Leonid, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Ter-Akopian, Gurgen, Fomichev, Andrey, Golovkov, M.S., Grigorenko, Leonid, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

The 5H system was produced in the 3H(t, p) 5H reaction studied at small CM angles with a 58MeV tritium ion beam. High statistics data were used to reconstruct the energy and angular correlations between the 5H decay fragments. A broad structure in the 5H missing-mass spectrum showing up above 2.5MeV was identified as a mixture of the 3/2+ and 5/2+ states. The data also present an evidence that the 1/2+ ground state of 5H is located at about 2MeV. Then, the 5H and 5He systems were explored by means of transfer reactions occurring in the interactions of 132MeV 6He beam nuclei with deuterium. In the 2H( 6He, 3H) reaction a T = 3/2 isobaric analog state of 5H in 5He was observed at an excitation energy of 22.0±0.3MeV with a width of 2.5±0.3MeV. © Società Italiana di Fisica / Springer-Verlag 2005., SCOPUS: cp.j, info:eu-repo/semantics/published

Published
2005

9. BACK MATTER

Author

Otsu, Hideaki, primary, Motobayashi, Tohru, additional, Roussel-Chomaz, Patricia, additional, and Otsuka, Takaharu, additional

Published
2012
Full Text
View/download PDF

10. FRONT MATTER

Author

Otsu, Hideaki, primary, Motobayashi, Tohru, additional, Roussel-Chomaz, Patricia, additional, and Otsuka, Takaharu, additional

Published
2012
Full Text
View/download PDF

11. Experimental study of 4H in the reactions 2H(t, p) and 3H(t, d)

Author

Sidorchuk, S.I., Bogdanov, Dmitrij D.D., Fomichev, Andrey, Golovkov, M.S., Oganessian, Yu.Ts., Rodin, AM, Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Hanappe, Francis, Materna, Thomas, Stuttge, Louise, Ninane, A., Roussel-Chomaz, Patricia, Mittig, Wolfgang, Sidorchuk, S.I., Bogdanov, Dmitrij D.D., Fomichev, Andrey, Golovkov, M.S., Oganessian, Yu.Ts., Rodin, AM, Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Korsheninnikov, A.A., Nikolskii, Yu, Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Hanappe, Francis, Materna, Thomas, Stuttge, Louise, Ninane, A., Roussel-Chomaz, Patricia, and Mittig, Wolfgang

Abstract

The 4H resonance was investigated in the transfer reactions 2H(t,p)4H and 3H(t,d)4H using cryogenic liquid targets of deuterium and tritium and 58 MeV triton beam. The multidetector system with a large angular acceptance was used to measure the recoil protons and deuterons in coincidences with tritons or neutrons from the decay of 4H. Data analysis involved careful considerations made for the competing processes of final state interaction and quasifree scattering. The experimental data show a peak with resonance parameters Eres=3. 05±0.19 MeV and Γobs=4.18±1.02 MeV. The pole of S-matrix corresponding to the physical values of energy and width, E 0=1.99±0.37 MeV and Γ0=2.85±0.3 MeV, has been extracted. © 2004 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

12. Observation of excited states in5H

Author

Golovkov, M.S., Grigorenko, Leonid, Fomichev, Andrey, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Itkis, Mikhail, Bogatchev, A.A., Kondratiev, N.A., Kozulin, E.M., Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Zlatoustovskiy, S.V., Golovkov, M.S., Grigorenko, Leonid, Fomichev, Andrey, Krupko, S.A., Oganessian, Yu.Ts., Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Itkis, Mikhail, Bogatchev, A.A., Kondratiev, N.A., Kozulin, E.M., Korsheninnikov, A.A., Nikolskii, Yu, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Palit, Rudrajyoti, Bouchat, Virginie, Kinnard, V., Materna, Thomas, Hanappe, Francis, Dorvaux, O., Stuttge, Louise, Angulo Perez, Carmen, Lapoux, Valerie, Raabe, Riccardo, Nalpas, L., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., and Zlatoustovskiy, S.V.

Abstract

The excited states in the 5H system, which was produced in the 3H(t, p)5H reaction with a 58 MeV tritium beam at c.m. angles were investigated. The reconstruction of the energy and angular correlations between the 5H decay fragments was performed by using high statistics data. It was observed that a broad structure in the 5H missing mass spectrum above 2.5 MeV was identified as a mixture of the 3/2+ and 5/2+ states. The results show that the 3/2+ and 5/2+ states are either almost degenerate or the reaction mechanism causes a very specific interference of these states., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

13. Evidences for resonance states in 5H

Author

Golovkov, M.S., Oganessian, Yu.Ts., Bogdanov, Dmitrij D.D., Fomichev, Andrey, Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Gorshkov, V.A., Chelnokov, Maxim, Itkis, Mikhail, Kozulin, E.M., Bogatchev, A.A., Kondratiev, N.A., Korzyukov, I.V. I.V., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Demin, A.M. A.M., Zlatoustovskiy, S.V., Kuryakin, Alexey A.V., Fil'chagin, S.V. S.V., Il'kayev, R.I. R.I., Hanappe, Francis, Materna, Thomas, Stuttge, Louise, Ninane, A., Korsheninnikov, A.A., Nikolskii, Yu, Tanihata, Isao, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Alamanos, Nicolas, Lapoux, Valerie, Pollacco, EC, Nalpas, L., Golovkov, M.S., Oganessian, Yu.Ts., Bogdanov, Dmitrij D.D., Fomichev, Andrey, Rodin, AM, Sidorchuk, S.I., Slepnev, R.S., Stepantsov, S.V., Ter-Akopian, Gurgen, Wolski, Roman, Gorshkov, V.A., Chelnokov, Maxim, Itkis, Mikhail, Kozulin, E.M., Bogatchev, A.A., Kondratiev, N.A., Korzyukov, I.V. I.V., Yukhimchuk, Arkadiy, Perevozchikov, V.V., Vinogradov, Yu, Grishechkin, S.K., Demin, A.M. A.M., Zlatoustovskiy, S.V., Kuryakin, Alexey A.V., Fil'chagin, S.V. S.V., Il'kayev, R.I. R.I., Hanappe, Francis, Materna, Thomas, Stuttge, Louise, Ninane, A., Korsheninnikov, A.A., Nikolskii, Yu, Tanihata, Isao, Roussel-Chomaz, Patricia, Mittig, Wolfgang, Alamanos, Nicolas, Lapoux, Valerie, Pollacco, EC, and Nalpas, L.

Abstract

Resonance states of 5H were investigated through the two-neutron transfer reaction t(t, p)5 H. A triton beam at 57.5 MeV and a cryogenic liquid tritium target were used. The 5H missing mass spectrum in triple coincidence, proton + triton + neutron, shows a resonance at 1.8 ± 0.1 MeV above the t + 2n decay threshold. This energy is in good agreement with the result reported in Phys. Rev. Lett. 87 (2001) 092501. The resonance width, Γintr ≤ 0.5 MeV, is surprisingly small and difficult to reconcile with theory predictions. © 2003 Published by Elsevier B.V., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2003

14. Radiative proton capture on 6He

Author

Wilschut, Hans H.W., Kugler, Andrej, Kravchuk, Vladimir, Liénard, Etienne, Löhner, Herbert, Mittig, Wolfgang, Ostendorf, Reint R.W., Pietri, Stéphane, Roussel-Chomaz, Patricia, Saint-Laurent, Marie Genevieve, Savajols, Hervé, Orr, Nigel, Wagner, Vladimir, Yahlali, Nadia, Sauvan, Emmanuel, Marqués, Francisco Miguel, Labiche, Marc, Le Brun, Christian, Angélique, Jean Claude, Borcea, Catalin, Catford, Wilton, Clarke, Nicholas, Descouvemont, Pierre, Díaz, José, Grévy, Stéphane, Wilschut, Hans H.W., Kugler, Andrej, Kravchuk, Vladimir, Liénard, Etienne, Löhner, Herbert, Mittig, Wolfgang, Ostendorf, Reint R.W., Pietri, Stéphane, Roussel-Chomaz, Patricia, Saint-Laurent, Marie Genevieve, Savajols, Hervé, Orr, Nigel, Wagner, Vladimir, Yahlali, Nadia, Sauvan, Emmanuel, Marqués, Francisco Miguel, Labiche, Marc, Le Brun, Christian, Angélique, Jean Claude, Borcea, Catalin, Catford, Wilton, Clarke, Nicholas, Descouvemont, Pierre, Díaz, José, and Grévy, Stéphane

Abstract

(a) Radiative proton capture on 6He was investigated. (b) Events on a halo neutron, the α core and 5He were recorded using quasifree capture (QFC) processes. (c) It was shown that radiative capture may provide a new probe for the study of clustering in the ground state of nuclei far from stability., SCOPUS: ar.j, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2001

16. Editorial

Author

Mittig, Wolfgang, primary, Naviliat-Cuncic, Oscar, additional, Roussel-Chomaz, Patricia, additional, and Villari, Antonio C.C., additional

Published
2008
Full Text
View/download PDF

17. THE SPIRAL2 PROJECT.

Author

ROUSSEL-CHOMAZ, PATRICIA

Subjects
*RESEARCH institutes, *PHYSICS, *RADIOACTIVE nuclear beams, *DETECTORS, *NUCLEAR research
Abstract

The project of an important new extension of the GANIL facility - SPIRAL 2 which entered in the construction phase in 2005 is shortly presented. The physics case of the facility is based on the use of high intensity stable and radioactive beams. Expected performances and main technical parameters of the facility as well as planned new experimental areas and detectors are described. [ABSTRACT FROM AUTHOR]

Published
2009

18. ACTIVE TARGET AS A TOOL FOR NUCLEAR SPECTROSCOPY AND REACTIONS.

Author

ROUSSEL-CHOMAZ, PATRICIA and SAVAJOLS, HERVE

Subjects
*NUCLEAR spectroscopy, *NUCLEAR reactions, *DETECTORS, *NUCLEAR physics, *GASES
Abstract

By the very nature of secondary beams, their intensity is limited, particularly for beams of the highest interest - farthest away from stability. Active targets, which can be described as time projection chamber (TPC)-like detectors in which the detector gas is the target, have been shown to have the highest sensitivity for quantitative high resolution studies of rare events. The physics cases that can be addressed with these devices are reviewed and some of the first results obtained with first generation active targets are detailed. Finally some general ideas on the next generation of active targets are presented. [ABSTRACT FROM AUTHOR]

Published
2009

19. Nuclear moments of micro-second isomeric fragments at BigRIPS

Author

Chevrier, R, Daugas, JM, Gaudefroy, L, Hass, M, Hass, H, Ueno, H, Aoi, N, Fukuda, N, Ichikawa, Y, Inabe, N, Ishihara, M, Kameda, D, Kubo, T, Ohnishi, T, Takeda, H, Watanabe, H, Yoshimi, A, Asahi, K, Furukawa, T, Hayashi, H, Iijima, H, Inoue, T, Ishii, Y, Nanao, T, Suzuki, K, Tsuchiya, M, Balabanski, DL, Georgiev, G, Cottenier, S, Neyens, G, Rajabali, MM, Otsu, Hideaki, Motobayashi, Tohru, Roussel-Chomaz, Patricia, and Otsuka, Takaharu

Subjects
Electromagnetic moments, Nuclear structure, Projectile fragmentation
Abstract

The measurement of nuclear moments of a μ-second isomeric state have been successfully performed using the RIKEN Radioactive Ion Beam Facility. The Time Dependent Perturbed Angular Distribution technique was applied on the 43S isomeric state produced by the fragmentation of a 48Ca beam and selected with the BigRIPS spectrometer. Following the measurement of the known g-factor of the isomer the quadrupole moment of this state was measured. Its spectroscopic quadrupole moment |QS| = 23(3) efm2 agreed with both shell model and beyond mean field calculations. ispartof: pages:33-40 ispartof: Proceedings of the French–Japanese Symposium pages:33-40 ispartof: LIA 2011 symposium location:RIKEN, Wako, Japan date:5 Jan - 8 Jan 2011 status: published

Published
2012

20. Étude de la fonction d'onde de l'$^{6}$He par la reaction de transfert $^{6}$He(p,t)$^{4}$He: contribution de la configuration à deux tritons

Author

Giot, Lydie, 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), Université de Caen, and Roussel-Chomaz Patricia

Subjects
Structure nucléaire, Physique nucléaire, Réaction de transfert, Nuclear physics, Diffusion élastique, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

This work is devoted to the study of the importance of the a-2n and triton-triton configurations in 6He. We measured at GANIL, the angular distribution of the transfer reaction 6He(p,t)a at 25 A.MeV with the SPEG spectrometer coupled to the MUST array. The forward and backward c.m. angles were obtained with SPEG. The coincidences of the MUST modules provide the intermediate angles. The elastic scattering 6He(p,p)6He, measured at the same time with the SPEG spectrometer, sets the optical potential 6He+p for the entrance channel of the transfer reaction. DWBA and coupled channels calculations allow to study the sensitivity to the possible different channels of the 6He+p system and specially the 6He breakup with discretized-continuum channels. The comparison between the theoritical and experimental 6He(p,t)a differential cross-section gives a spectroscopic factor close to 1 for the a-2n configuration and between 0.06 and 0.09 for the t-t configuration.; Cette étude porte sur l'importance des configurations a-2n et triton-triton de l'6He. Nous avons mesuré la distribution angulaire de la réaction de transfert 6He(p,t)a à 25 A.MeV au GANIL avec le spectromètre SPEG couplé au détecteur MUST. Les angles avant et arrière c.m. sont obtenus avec SPEG. Les coïncidences des modules MUST fournissent les angles intermédiaires. La diffusion élastique 6He(p,p)6He, également mesurée avec le spectromètre SPEG, fixe le potentiel optique 6He+p pour la voie d'entrée de la réaction de transfert. Des calculs DWBA et en voies couplées de la section efficace différentielle de 6He(p,t)a ont permis d'étudier la sensibilité aux voies de réactions possibles du système 6He+p et notamment la cassure de l'6He en discrétisant le continuum. La comparaison entre les sections efficaces différentielles de 6He(p,t)a calculée et expérimentale donne un facteur spectroscopique proche de 1 pour la configuration a-2n et compris entre 0.06 et 0.09 pour la configuration t-t.

Published
2003

Catalog

Books, media, physical & digital resources
See catalog results