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6 results on '"HIMPE, P."'

1. g factors of 17N and 18N remeasured

Author

De Rydt, M., Balabanski, D.L., Daugas, J.M., Himpe, P., Kameda, D., Lozeva, Radomira, Morel, Pierre, Perrot, L., Shimada, K., Stodel, C., Sugimoto, T., Thomas, J.C., Ueno, H., Vermeulen, N., Vingerhoets, P., Yoshimi, A., Neyens, G., Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences (BAS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), 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), CYRIC, Tohoku University [Sendai], 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), 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), 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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 21.10.Ky, 21.60.Cs, 24.70.+s, 27.20.+n
Abstract

Expérience GANIL, LISE; The g factors of the 17N and 18N ground states were remeasured using the β-nuclear magnetic resonance (β-NMR) technique on spin-polarized fragment beams at the LISE fragment separator at GANIL. Based on the g-factor results, the magnetic moments of 17N (I π = 1/2−) and 18N (I π = 1−) were deduced: |μ(17N)| = 0.3551(4) μN and |μ(18N)| = 0.3273(4) μN. Both results are in good agreement with and more precise than the earlier observed values.

Published
2009
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2. A new dedicated β-NMR/β-NQR setup for LISE-GANIL

Author

De Rydt, M., Lozeva, Radomira, Vermeulen, N., de Oliveira Santos, Francois, Grévy, S., Himpe, P., Stodel, C., Thomas, J.C., Vingerhoets, P., Neyens, G., Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), 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), 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
β-Nuclear Magnetic Resonance(β-NMR), Nuclear moments, detection system, 21.10.Ky,27.20.+n,25.70.Mn,07.50.-e,07.55.-w,29.40.Mc,07.20.Mc, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], GEANT4, β-Nuclear Quadrupole Resonance(β-NQR)
Abstract

A new β-NMR/β-NQR setup is developed to study nuclear magnetic dipole moments and electric quadrupole moments at the LISE fragment separator at GANIL. Two key elements make the new design very powerful: the homogeneous magnet and the strong radio-frequency amplifier. The combination of both makes it possible to examine a broad spectrum of magnetic dipole and electric quadrupole moments. Several factors have an influence on the detection efficiency and on the sensitivity of the setup to observe a resonant change in the β-asymmetry: the thickness and the tilting angle of the implantation crystal, the material in the vacuum chamber, the applied magnetic field and the Qβ-value of the decaying nuclei. A detailed study of these effects is made using a dedicated GEANT4 Monte Carlo simulation code.

Published
2009
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3. Erratum: $\beta$ decay of $^{31}$Mg: Extending the 'island of inversion'

Author

MARÉCHAL, F., L. BALABANSKI, D., BORREMANS, D., DAUGAS, J.M., DE OLIVEIRA SANTOS, Francois, DESSAGNE, P., GEORGIEV, G., GIOVINAZZO, J., GRÉVY, S., HIMPE, P., JOLLET, C., MATEA, I., NEYENS, G., PERROT, F., POIRIER, E., ROIG, O., STANOIU, M., STODEL, C., THOMAS, J.C., TURZO, K., YORDANOV, D., CAURIER, E., NOWACKI, F., POVES, A., 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
27.30.+t, 23.20.Lv, 21.60.Cs, 99.10.Cd, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2007
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4. Spin polarization of $^{34}$Al fragments produced by nucleon pickup at intermediate energies

Author

Turzó, K., Himpe, P., L. Balabanski, D., Bélier, G., Borremans, D., M. Daugas, J., Georgiev, G., de Oliveira Santos, Francois, Mallion, S., Matea, I., Neyens, G., E. Penionzhkevich, Yu., Stodel, C., Vermeulen, N., Yordanov, D., 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
nuclei with mass number 20 to 38, nuclear spin, polarisation in nuclear reactions and scattering, Nuclear Theory, nuclear energy levels, heavy ion-nucleus reactions, 24.70.+s, 27.30.+t, 24.10.-i, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, pick-up reactions, nuclear parity
Abstract

Expérience GANIL; The polarization of ${34}$Al fragments, produced by single neutron pickup from a ${9}$Be target by a ${36}$S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed $\beta$-asymmetry. The reaction-induced polarization is deduced using a tentative spin/parity assignment for the $^{34}$Al ground state. A positive polarization was measured near the peak of the $^{34}$Al yield curve. A kinematical model based on the spectator-participant model for projectile fragmentation reactions has been extended in order to take into account the features of pickup reactions, i.e., the picked-up nucleon having an average momentum equal to the Fermi momentum and aligned along the incident beam direction. The trend-line in the observed spin-orientation is very well reproduced by this model.

Published
2006
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5. $\beta$ decay of 31Mg: Extending the 'island of inversion'

Author

MARÉCHAL, F., L. BALABANSKI, D., BORREMANS, D., DAUGAS, J.-M., DE OLIVEIRA SANTOS, Francois, DESSAGNE, P., GEORGIEV, G., GIOVINAZZO, J., GRÉVY, S., HIMPE, P., JOLLET, C., MATEA, I., NEYENS, G., PERROT, F., POIRIER, E., ROIG, O., STANOIU, M., STODEL, C., THOMAS, J.C., TURZÓ, K., YORDANOV, D., CAURIER, E., NOWACKI, F., POVES, A., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), National Institute for Physics and Nuclear Engineering (NIPNE), National Institute for Physics and Nuclear Engineering, 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), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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
27.30.+t, 23.20.Lv, 21.60.Cs, Properties of nuclei with 20 <= A <= 38, Nuclear gamma transitions and level energies, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear shell model
Abstract

International audience; The beta of 31Mg has been investigated at GANIL. The ions were implanted in a silicon detector array surrounded by germanium gamma detectors. beta particles and subsequent gamma rays have been observed. The 31Mg half-life has been measured (T_1/2=237pm25 ms) in good agreement with previously reported values. The decay scheme of 31Mg has been enriched with two new low-spin levels and seven new $\gamma$ transitions in 31Al. Most importantly, very weak feeding to the 31Al ground and lowest excited states has been established. These results are compared to new shell-model calculations in the sd-fp valence space, using an interaction that was modified in order to reproduce the recently established low-energy level scheme of 31Mg. A good agreement for all observables is found, supporting the idea that 31Al is outside and 31Mg is inside the so-called "island of inversion."

Published
2005
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6. Magnetic moment of the fragmentation-aligned $^{61}$Fe (9/$2^+$) isomer

Author

Matea, I, Georgiev, G, Dougas, J M, Hass, M, Neyens, G, Astabatyan, R A, Baby, L T, Balabanski, D L, Bélier, G, Borremans, D, Chappert, F, Girod, M, Goldring, G, Goutte, H, Himpe, P, Lewitowicz, Lukyanov, S, Méot, V, De Oliveira-Santos, F, Penionzhkevich, Yu E, Porquet, M G, Roig, O, Sawicka, M, 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
21.10.Ky, 21.60.-n, 23.20.En, 27.50.+e, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Physics
Abstract

We report on the g factor measurement of the isomer in $^{61}Fe$ ($E^{*}=861 keV$). The isomer was produced and spin-aligned via a projectile-fragmentation reaction at intermediate energy, the Time Dependent Perturbed Angular Distribution (TDPAD) method being used for the measurement of the g factor. For the first time, due to significant improvements of the experimental technique, an appreciable residual alignment of the isomer has been observed, allowing a precise determination of its g factor: $g=-0.229(2)$. Comparison of the experimental g factor with shell-model and mean field calculations confirms the $9/2^+$ spin and parity assignments and suggests the onset of deformation due to the intrusion of Nilsson orbitals emerging from the $\nu g_{9/2}$., Comment: 4 figures. Submitted to Phys. Rev. Lett

Published
2004
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