21 results on '"nuclei with mass number 20 to 38"'
Number of results to display per page
Search Results
2. Decay of neutron deficient 32Ar revisted
- Author
-
DOMINGUEZ-REYES, R., BORGE, M.J.G., BLANK, Bertram, MATEA, I., ADIMI, N., THOMAS., J.C., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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 ,Physics::Instrumentation and Detectors ,argon ,nuclear structure ,High Energy Physics::Experiment ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,particle detectors ,neutron decay ,proton emission decay - Abstract
International audience; The aim of this work is to revisit the decay of Argon 32Ar with special emphasis in the p-γ coincidences. The study was motivated by the increase in granularity and sensitivity of the charged particle detectors and by the high sensitivity and large angular coverage obtained by the use of CLOVER detectors.
- Published
- 2007
- Full Text
- View/download PDF
3. Spectroscopic Study of Neutron Shell Closures via Nucleon Transfer in the Near-Dripline Nucleus $^{23}$O
- Author
-
Elekes, Z., Dombrádi, Zs., Aoi, N., Bishop, S., Fülöp, Zs., Gibelin, J., Gomi, T., Hashimoto, Y., Imai, N., Iwasa, N., Iwasaki, H., Kalinka, G., Kondo, Y., Korsheninnikov, A.A., Kurita, K., Kurokawa, M., Matsui, N., Motobayashi, T., Nakamura, T., Nakao, T., Yu. Nikolskii, E., Ohnishi, T.K., Okumura, T., Ota, S., Perera, A., Saito, A., Sakurai, H., Satou, Y., Sohler, D., Sumikama, T., Suzuki, D., Suzuki, M., Takeda, H., Takeuchi, S., Togano, Y., Yanagisawa, Y., 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
nuclei with mass number 20 to 38 ,nuclear shell model ,Nuclear Theory ,nuclear energy levels ,deuteron-nucleus reactions ,Monte Carlo methods ,21.10.Pc, 25.45.Hi, 25.60.Je, 27.30.+t ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment ,excited states - Abstract
Neutron single particle energies have been measured in 23O using the 22O(d,p)23O*--22O+n process. The energies of the resonant states have been deduced to be 4.00(2) MeV and 5.30(4) MeV. The first excited state can be assigned to the nu d3/2 single particle state from a comparison with shell model calculations. The measured 4.0 MeV energy difference between the nu s1/2 and nu d3/2 states gives the size of the N=16 shell gap which is in agreement with the recent USD05 ("universal" sd from 2005) shell model calculation, and is large enough to explain the unbound nature of the oxygen isotopes heavier than A=24. The resonance detected at 5.3 MeV can be assigned to a state out of the sd shell model space. Its energy corresponds to a approximately 1.3 MeV sized N=20 shell gap, therefore, the N=20 shell closure disappears at Z=8 in agreement with Monte Carlo shell model calculations using SDPF-M interaction.
- Published
- 2007
- Full Text
- View/download PDF
4. In-beam $\gamma$ spectroscopy using DIC with a radioactive Ne beam
- Author
-
Benzoni, G., Azaiez, F., Leoni, S., Battacharyya, S., Borcea, R., Bracco, A., Corradi, L., Curien, D., De France, G., Dombrádi, Zs., Fioretto, E., Franchoo, S., Grévy, S., Ibrahim, F., Iulian, S., Mukherjee, G., Navin, A., Pollarolo, G., Redon, N., Regan, P.H., Rejmund, M., Schmitt, C., Sletten, G., Sohler, D., Stanoiu, M., Szilner, S., Verney, D., Institut de Physique Nucléaire d'Orsay (IPNO), 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), 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), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), EXOGAM, SPIRAL, VAMOS, 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), 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 Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Corradi, L., Szilner, S., Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Laboratori Nazionali di Legnaro (LNL), L.Corradi, D. Ackermann, E. Fioretto, A. Gadea, F. Haas, G. Pollarolo, F. Scarlassara, Suzana Szilner, M. Trotta, Istituto Nazionale di Fisica Nucleare [Milano] (INFN), and National Institute for Nuclear Physics (INFN)
- Subjects
Light nucleus ,General Physics and Astronomy ,chemistry.chemical_element ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,Settore FIS/04 - Fisica Nucleare e Subnucleare ,Nuclear physics ,Chemical kinetics ,24Ne SPIRAL beam ,VAMOS+EXOGAM ,multi-nucleon transfer reactions ,neutron-rich light nuclei ,Neon ,21.10.-k ,25.60.-t ,27.30.+t ,Fragmentation (mass spectrometry) ,0103 physical sciences ,General Materials Science ,Gamma spectroscopy ,neon ,Physical and Theoretical Chemistry ,010306 general physics ,Spectroscopy ,radioactive ion beams ,Nuclear Experiment ,nuclei with mass number 20 to 38 ,Spectrometer ,010308 nuclear & particles physics ,Settore FIS/01 - Fisica Sperimentale ,radioactive Ne beams ,VAMOS-Exogam ,DIC ,Deep inelastic scattering ,chemistry ,gamma-ray spectroscopy ,nuclear reactions and scattering ,Atomic physics ,25.60.Je, 27.30.+t, 29.30.Kv, 29.25.Rm - Abstract
The preferred production mechanisms used to investigate the region of light nuclei, such as O, Ne and F, have been transfer reactions and, more recently, two-step fragmentation. Multi-nucleon transfer reactions can be an important complementary tool to populate this mass region. Deep-inelastic and multi-nucleon transfer reactions have been largely used to study heavier systems, however no information is yet available regarding the effectiveness of these reaction mechanisms going towards lighter nuclei. In this proceeding we present promising preliminary results from an experiment performed with a radioactive $^{24}$Ne beam from SPIRAL facility at GANIL using the VAMOS spectrometer in conjunction with the EXOGAM array.
- Published
- 2006
- Full Text
- View/download PDF
5. Nature and decay of a $J\pi$=$36^{+}$ resonance in the $^{24}$Mg + $^{24}$Mg reaction
- Author
-
A. Latina, S. M. Lenzi, Z. M. Wang, R. Chapman, S. Beghini, C. Beck, X. Liang, M. D. Salsac, E. Farnea, G. Pollarolo, D. G. Jenkins, D. R. Napoli, L. Corradi, Alejandro Algora, Zsolt Dombrádi, Suzana Szilner, A. Gadea, Fernando Scarlassara, B. R. Behera, F. Haas, N. Marginean, Michèle Rousseau, I. Pokrovski, A. M. Stefanini, M. Trotta, S. Courtin, G. Montagnoli, P. Papka, A. Sanchez i Zafra, E. Fioretto, 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), L.Corradi, D.Ackermann, E.Fioretto, A.Gadea, F.Haas, G.Pollarolo, F.Scarlassara, S.Szilner, M.Trotta, Coradi, L., and Szilner, S.
- Subjects
nuclei with mass number 20 to 38 ,Chemistry ,nuclear resonances ,Resonance ,020206 networking & telecommunications ,02 engineering and technology ,magnesium ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Coincidence ,nuclear reactions and scattering ,Off resonance ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Atomic physics ,molecular-resonant states ,hyperdeformed molecular state ,fragment- coincidence measurements ,PRISMA-CLARA array ,25.70.Ef, 27.30.+t ,Ground state ,Spin (physics) ,Nuclear Experiment ,Radioactive decay - Abstract
It has been proposed to associate the narrow (\Gamma=170 keV) and high spin ($J\pi$=36^+) resonance in the 24Mg + 24Mg reaction at E_c.m= 45.7 MeV with a hyperdeformed molecular state in 48Cr. Such a description has important consequences for the resonance decay into the favoured inelastic channels. Through fragment- coincidence measurements performed ON and OFF resonance using the PRISMA-CLARA array, we have established that the 24Mg states selectively populated are the 2^+ and 4^+ members of the ground state band.
- Published
- 2006
- Full Text
- View/download PDF
6. Shell Gap Reduction In Exotic N = 17 Nuclei
- Author
-
Obertelli, A., Alamanos, N., Alvarez, M., Auger, F., Dayras, R., Drouart, A., de France, G., Gillibert, A., Jurado, B., Keeley, N., Lapoux, V., Mittig, W., Mougeot, X., Nalpas, L., Pakou, A., Patronis, N., Pollacco, E., Rejmund, F., Rejmund, M., Roussel-Chomaz, P., Savajols, H., Skaza, F., Theisen, Ch., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), S.V. Harissopulos, P. Demetriou, E. Julin, EXOGAM, SPIRAL, 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 ,nuclei with mass number 20 to 38 ,Nuclear Theory ,chemistry.chemical_element ,020206 networking & telecommunications ,Parity (physics) ,02 engineering and technology ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,25.40.Hs, 27.30.+t, 21.10.Hw ,Nuclear physics ,Neon ,chemistry ,0202 electrical engineering, electronic engineering, information engineering ,High Energy Physics::Experiment ,020201 artificial intelligence & image processing ,Neutron ,neutron-nucleus reactions ,neon ,Atomic physics ,Nuclear Experiment ,Nucleon ,Gap reduction ,nuclear parity - Abstract
An experimental spectroscopic investigation of some neutron rich Mg and Al isotopes around the shell closure N=20 has been performed. The delayed neutron and $\gamma$ spectra, following the $\beta$-decay of $^{33}$Mg and $^{35}$Al have been measured using the delayed neutron detector array TONNERRE coupled with high efficiency EXOGAM clover detectors, a LEPS detector and eight low-energy neutron detectors. A detailed analysis of such spectra allows one to construct the level schemes of their daughters, $^{32,33)$Al and $^{34,35}$Si. The resulting spectroscopic information will provide stringent tests of large scale shell model calculations including np - nh excitations aimed at the understanding of the structural effects occurring in this region.
- Published
- 2006
- Full Text
- View/download PDF
7. Studies of Single-Particle Structure in the N=16 Region Using Transfer Reactions
- Author
-
Lemmon, R. C., Beatriz Fernandez Dominguez, Timis, C., Labiche, M., Catford, W. N., Chartier, M., Ashwood, N., Amzal, N., Baldwin, T. D., Burns, M., Caballero, L., Chapman, R., Curtis, N., France, G., Freer, M., Gelletly, W., Liang, X., Orr, N. A., Pain, S. D., Pucknell, V. P. E., Rejmund, M., Rubi, B., Savajols, H., Sarlin, O., Spohr, K., Thiesen, C., Warner, D. D., Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), 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), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), L.Corradi, D. Ackermann, E. Fioretto, A. Gadea, F. Haas, G. Pollarolo, F. Scarlassara, Suzana Szilner, M. Trotta, EXOGAM, SPIRAL, VAMOS, Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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
Physics ,Nuclear reaction ,nuclei with mass number 20 to 38 ,Spectrometer ,Cyclotron ,Hadron ,020206 networking & telecommunications ,Elementary particle ,02 engineering and technology ,Fermion ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,law.invention ,Nuclear physics ,law ,nuclear structure ,0202 electrical engineering, electronic engineering, information engineering ,Measuring instrument ,deuteron-nucleus reactions ,21.10.Pc, 25.45.Hi, 27.30.+t ,020201 artificial intelligence & image processing ,neon ,Nuclear Experiment ,Nucleon - Abstract
International audience; We have developed a new experimental setup based at the GANIL/SPIRAL facility in Caen, France to measure one-nucleon transfer reactions in inverse kinematics in order to study the evolution of the single particle structure of exotic nuclei. The setup couples together three state-of-the-art detection systems: the TIARA Si array, the large-acceptance magnetic spectrometer VAMOS and the high-efficiency segmented Ge gamma-ray array EXOGAM. In a first experiment, the $^{24}$Ne(d,p)$^{25}$Ne reaction has been studied to probe the N=16 shell closure. Details of the setup, data analysis and preliminary results are presented.
- Published
- 2006
- Full Text
- View/download PDF
8. The N=14 shell closure in $^{22}$O viewed through a neutron sensitive probe
- Author
-
Becheva, E., Blumenfeld, Y., Khan, E., Beaumel, D., Daugas, J.M., Delaunay, F., Demonchy, C.E., Drouart, A., Fallot, Muriel, Gillibert, A., Giot, Lydie, Grasso, M., Keeley, N., W. Kemper, K., T. Khoa, D., Lapoux, V., Lima, V., Musumarra, A., Nalpas, L., C. Pollacco, E., Roig, O., Roussel-Chomaz, P., E. Sauvestre, J., A. Scarpaci, J., Skaza, F., Than, H. S., 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), 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
nuclear optical model ,nuclei with mass number 20 to 38 ,21.10.Re, 25.40.Cm, 25.40.Ep, 21.60.Jz, 24.10.Eq ,RPA calculations ,nuclear shell model ,proton-nucleus reactions ,Nuclear Theory ,nuclear forces ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment ,HF calculations - Abstract
NESTER PTH; International audience; To investigate the behavior of the N=14 neutron gap far from stability with a neutron-sensitive probe, proton elastic and 2+1 inelastic scattering angular distributions for the neutron-rich nucleus 22O were measured with a secondary beam intensity of only 1200 particles per second using the MUST silicon strip detector array at the GANIL facility. A phenomenological analysis yields a deformation parameter bp;p' = 0.26 +- 0.04 for the 2+1 state, much lower than in 20O, showing a surprisingly weak neutron contribution to this state. A fully microscopic analysis was performed using optical potentials obtained from matter and transition densities generated by continuum Skyrme-HFB and QRPA calculations, respectively. When the present results and those from a 22O + 197Au scattering experiment are combined, the ratio of neutron to proton contributions to the 2+1 state is found close to the N/Z ratio, demonstrating a strong N=14 shell closure in the vicinity of the neutron drip-line.
- Published
- 2006
- Full Text
- View/download PDF
9. Precise measurement of the differential cross section from the16O(α,α)16O elastic reaction at 165° and 170° between 2.4 and 6.0 MeV
- Author
-
Demarche, Julien and Terwagne, Guy
- Subjects
alpha particle-nucleus scattering ,nuclear shell model ,nuclei with mass number 6 to 19 ,nuclei with mass number 20 to 38 ,Rutherford backscattering - Abstract
Non-Rutherford cross section for elastic scattering of α particles from oxygen has been measured for energies between 2.4 and 6.0 MeV at commonly used backscattering angles of 165° and 170°. High precision in energy has been obtained with a 2 MV Tandetron accelerator, with precise and stable energy calibration. The choice of a thin Ta2O5/Ta/C standard increased the sensitivity and reduced systematic errors due to the geometry. Precise data for energy, width, and ratio to Rutherford of the resonances have been extracted from nuclear shell models, and excitation levels of 20Ne have been deduced. The well-known resonance ER=3031.7±0.5 keV and the narrow and intense resonance ER=5375.5±0.5 keV, not included in cross-section libraries, have been applied for surface oxygen analysis in thin WCN/SiO2/Si multilayer samples, with improved depth resolution by optimizing the measuring geometry.
- Published
- 2006
10. 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
- Full Text
- View/download PDF
11. Studies of the Single Particle Structure of Exotic Nuclei using Transfer Reactions
- Author
-
Fernandez-Dominguez, B., Lemmon, R. C., Timis, C., Labiche, A., Catford, W. N., Chartier, M., Ashwood, N., Amzal, N., Baldwin, T. D., Burns, M., Caballero, L., Chapman, R., Curtis, N., France, G., Freer, M., Gelletly, W., Liang, X., Orr, N. A., Steven Pain, Pucknellt, V. P. E., Rejmund, M., Rubio, B., Savajols, H., Sorlin, O., Spohr, K., Thiesen, C., Warner, D. D., 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), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), S.V. Harissopulos, P. Demetriou, E. Julin, EXOGAM, 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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
Physics ,nuclei with mass number 20 to 38 ,spectrometers ,Spectrometer ,germanium radiation detectors ,21.10.Pc, 25.60.Je, 27.30.+t, 29.30.-h, 29.40.Wk ,Nuclear structure ,chemistry.chemical_element ,020206 networking & telecommunications ,02 engineering and technology ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Semiconductor detector ,Nuclear physics ,Neon ,Germanium radiation detectors ,Deuterium ,chemistry ,nuclear structure ,0202 electrical engineering, electronic engineering, information engineering ,Particle ,020201 artificial intelligence & image processing ,neon ,Nuclear Experiment ,Beam (structure) - Abstract
The TIARA+VAMOS+EXOGAM set-up has recently been installed at GANIL to study the single-particle structure of exotic nuclei. The unique characteristics of the TIARA array, combined with the large acceptance spectrometer VAMOS and the high efficiency Germanium detector array EXOGAM, has allowed high-resolution measurements of transfer reactions in inverse kinematics using low intensity exotic beams. We will describe the experimental set-up, data analysis and preliminary results of the first experiments using a $^{24}$Ne beam from SPIRAL, concentrating in particular on the performance of VAMOS that has been used to detect the heavy fragments after the (d,p), (d,d) and (d,t) reactions.
- Published
- 2005
- Full Text
- View/download PDF
12. Spectroscopy of neutron-deficient nuclei around $^{36}$Ca
- Author
-
W. Korten, S. J. Williams, F. Ibrahim, J. Mrazek, C. Engelhardt, O. Sorlin, Zs. Dombrádi, Emyr Clement, Dóra Sohler, G. Sletten, S. Franchoo, J. C. Dalouzy, D. Verney, G. Benzoni, S. Grévy, A. Navin, Zs. Fülöp, F. Rotaru, F. Azaiez, H. Hübel, M. G. Saint-Laurent, A. Drouart, M. Stanoiu, B. Bastin, A. Al-Khatib, C. N. Timis, Z. Dlouhý, R. Borcea, C. Bourgeois, Ch. Theisen, Alejandro Algora, P. Roussel-Chomaz, A. Bürger, Andreas Görgen, P. Bringel, 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), 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), S.V. Harissopulos, P. Demetriou, E. Julin, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
- Subjects
27.30.+t, 21.10.Gv, 29.30.Kv ,Nuclear Theory ,General Physics and Astronomy ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,7. Clean energy ,01 natural sciences ,Ion ,Nuclear physics ,Fragmentation (mass spectrometry) ,0103 physical sciences ,medicine ,Gamma spectroscopy ,General Materials Science ,Neutron ,Mirror nuclei ,Physical and Theoretical Chemistry ,010306 general physics ,Spectroscopy ,Nuclear Experiment ,Physics ,calcium ,nuclei with mass number 20 to 38 ,Spectrometer ,Isotope ,010308 nuclear & particles physics ,neutrons ,21.10.-k ,23.20.lv ,27.30.+t ,medicine.anatomical_structure ,gamma-ray spectroscopy ,Isospin ,Excited state ,Physics::Accelerator Physics ,Atomic physics ,Nucleus ,Beam (structure) - Abstract
International audience; An experiment was performed to extend the knowledge of excited states in neutron-deficient Ca isotopes. In particular, excited states in $^{36}$Ca were searched for to allow for a comparison with its stable mirror nucleus, $^{36}$S. Secondary beams of $^{37}$Ca and $^{36}$Ca were produced by fragmentation of a primary $^{40}$Ca beam with an energy of 95 · A MeV on the SISSI target at GANIL. A variety of nuclei around $^{36}$Ca has been produced in a secondary Be target by neutron and proton-removal at beam energies around 61 · A MeV. The produced nuclei were identified using the spectrometer SPEG, and prompt $\gamma$ rays were measured with the Château de Cristal. A preliminary value for the energy of the first $2^+$ state of $^{36}$Ca has been determined.
- Published
- 2005
- Full Text
- View/download PDF
13. 12C+12C cluster resonances in 24Mg up to Ex = 50 MeV
- Author
-
Metelko, C. J., Freer, M., Ashwood, N. I., Curtis, N., Clarke, N. M., Soić, Neven, Ziman, V. A., and Woolliscroft, R. J.
- Subjects
heavy ion-nucleus reactions ,nuclei with mass number 20 to 38 ,nuclear cluster model ,deformed nuclei ,nuclear resonances ,Nuclear Experiment - Abstract
The population and decay of excited states in 24Mg have been investigated using the 12C(16O, 12C12C)alpha reaction at beam energies of 135 and 160 MeV . This measurement permitted the decay spectrum to be measured up to 24Mg excitation energies of 70 MeV . Resonance structures were observed up to an excitation energy of 49.4 MeV and spin J = 18[h-bar] . The results are discussed in terms of the termination of a deformed 12C+12C cluster band.
- Published
- 2003
14. 26Al measurement with a cyclotron
- Author
-
G.M. Raisbeck, C. Stephan, F. Yiou, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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 Institut de Physique Nucléaire d'Orsay (IPNO)
- Subjects
Cyclotron ,geochronology ,01 natural sciences ,long lived nuclides ,law.invention ,Nuclear physics ,law ,Absolute dating ,radioactive dating ,0103 physical sciences ,radioactive decay periods ,Nuclide ,isobars ,010306 general physics ,absolute dating technique ,010302 applied physics ,Physics ,nuclei with mass number 20 to 38 ,Isotope ,sup 26 Al ,sediments ,General Engineering ,geophysical techniques ,accelerator technique ,Uranium-uranium dating ,[PHYS.HIST]Physics [physics]/Physics archives ,Isobar ,Radiometric dating ,beta decay ,[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] ,Isotopes of beryllium ,marine sediments - Abstract
We have used the accelerator facility ALICE to count directly small quantities (∼ 5 × 109 atoms) of the isotope 26Al (half-life = 7.3 x 105 years). We discuss how measurement of this nuclide in marine sediments, in conjunction with similar measurements of 10 Be (half-life = 1.5 × 106 years), can be used as an absolute dating technique. The method used here to avoid interference from the isobar 26Mg is applicable to a number of other isobars of interesting long lived nuclides, thus expanding the potential application of the accelerator technique.
- Published
- 1979
- Full Text
- View/download PDF
15. Etude de la décroissance β+ de 33Cl
- Author
-
J. Morales, M. Plo, F. Leccia, P. Mennrath, P. Dupuis, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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
Physics ,nuclei with mass number 20 to 38 ,010308 nuclear & particles physics ,[PHYS.HIST]Physics [physics]/Physics archives ,nuclear energy level transitions ,0103 physical sciences ,beta decay ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,010306 general physics ,01 natural sciences ,Molecular biology - Abstract
La désintégration β+ de 33Cl a été étudiée en mesurant, à l'aide d'un détecteur Ge intrinsèque, les rayonnements γ associés de désexcitation des états de 33S. Un nouvel embranchement β de (3,6 ± 1,5). 10-4 a été mis en évidence vers l'état E x = 2,313 MeV, Jπ = 3/2+. Les résultats ont été comparés aux prévisions du modèle de Nilsson et une comparaison a également été faite entre transitions γ et transitions β Δ T = 0 analogues.
- Published
- 1981
- Full Text
- View/download PDF
16. Measurement of cross sections for 22Na, 20-22Ne and 36-42Ar in the spallation of Mg, Al, Si, Ca and Fe. Production ratios of some cosmogenic nuclides in meteorites
- Author
-
S. Regnier and F. Baros
- Subjects
Physics ,nuclei with mass number 20 to 38 ,010504 meteorology & atmospheric sciences ,Radiochemistry ,Cosmic ray ,nuclear spallation ,010502 geochemistry & geophysics ,7. Clean energy ,01 natural sciences ,Iron meteorite ,meteorites ,proton nucleus reactions ,Nuclear physics ,nuclei with mass number 39 to 58 ,Meteorite ,13. Climate action ,[PHYS.HIST]Physics [physics]/Physics archives ,Spallation ,Cosmogenic nuclide ,0105 earth and related environmental sciences - Abstract
We measured the cross sections of 22Na, 20,21,22Ne and 36,38,39,42Ar in nuclear reactions induced by the proton bombardment of Mg, Al, Si, Ca and Fe at several energies between 0.059 and 24 GeV using highsensitivy mass-spectrometry for noble gases and γ-counting for 22Na. We then evaluated the cross section ratio versus energy for the 22Na/22Ne, 26Al/21Ne, 39Ar/38Ar and 36Cl/ 36Ar radioactive-stable pairs of isotopes, which are useful for measuring the exposure age of meteorites. From the results alone, we can set some limits to the corresponding production ratios in iron meteorites, but not in stony objects because a knowledge of chemical abundances of Na, Mg, Al, Si, S, K, Ca, Fe, and shielding conditions are required.
- Published
- 1984
- Full Text
- View/download PDF
17. Analyse de spectres d'énergie β+ Méthode et applications à la détermination d'énergie totale de transition β pour des noyaux identifiés par la technique de temps de vol dans la région N ≃ Z ≃ 40
- Author
-
Y. Le Beyec, D. Jacquet, S. Della Negra, 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
beta ray spectra ,nuclei with mass number 20 to 38 ,010308 nuclear & particles physics ,heavy ion nucleus reactions ,shape fitting method ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,beta transition total energy ,positron spectra ,nuclei with mass number 59 to 89 ,nuclei with mass number 39 to 58 ,sup 54 Fe sup 32 S ,[PHYS.HIST]Physics [physics]/Physics archives ,0103 physical sciences ,determination of end point energy ,coincidence spectra ,010306 general physics ,sup 27 Al sup 32 S - Abstract
Une methode par analyse de forme de spectres de positon a ete developpee a Orsay pour determiner l'energie totale des transitions β+. Une precision inferieure a 100 keV peut etre atteinte par cette methode qui est applicable a des spectres de faibles activites. Les spectres de reference et les spectres de Qβ inconnus sont mesures simultanement dans les memes conditions. Nous avons applique cette methode de determination de Qβ a quelques isotopes produits au cours des reactions 32S + 27Al et 32S + 54Fe.
- Published
- 1981
- Full Text
- View/download PDF
18. Low lying yrast states of 32S
- Author
-
R. M. Freeman, F. Haas, A. Niemeskem, C. Beck, Institut de Recherches Subatomiques (IReS), and 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)
- Subjects
Physics ,nuclear collective states and giant resonances ,neutron+gamma sup 32 S ,nuclei with mass number 20 to 38 ,Spin states ,angular correlation ,Yrast ,nuclear energy level transitions ,sup 32 S ,General Engineering ,State (functional analysis) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear physics ,negative parity high spin states ,yrast states ,Angular correlation ,[PHYS.HIST]Physics [physics]/Physics archives ,nuclear spin and parity ,Atomic physics ,Parity (mathematics) ,sup 29 Si alpha - Abstract
From angular correlation measurements with the 29Si(α, nγ) 32S reaction the 6 762-keV level has been assigned Jπ = 5-. Four new levels of 32S have been observed at Ex = 7 567-, 8 345-, 9 464- and 9 637-keV. The 7 567-keV level has been assigned Jπ = 5+ and the 8 345-keV level is a good candidate for the lowest 6+ state. The two higher levels are probably negative parity high spin states.
- Published
- 1983
- Full Text
- View/download PDF
19. Strong polarization of the residual nucleus in a heavy-ion induced transfer reaction
- Author
-
M. Bernas, F. Naulin, B. Fabbro, P. Roussel, E. Plagnol, G. Rotbard, Apostolos Panagiotou, F. Pougheon, 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
polarisation in nuclear reactions and scattering ,heavy ion nucleus reactions ,sup 20 Ne levels ,heavy ion induced transfer reaction ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Residual ,01 natural sciences ,distorted wave Born approximation ,0103 physical sciences ,medicine ,sup 12 C sup 20 Ne ,010306 general physics ,Nuclear Experiment ,Physics ,nuclei with mass number 20 to 38 ,sup 16 O sup 16 O ,010308 nuclear & particles physics ,General Engineering ,nuclear polarisation ,Polarization (waves) ,strong polarization ,medicine.anatomical_structure ,[PHYS.HIST]Physics [physics]/Physics archives ,Heavy ion ,Atomic physics ,Nucleus - Abstract
A strong polarization of 20Ne levels has been observed in the 16O(16O, 12C)20Ne* reaction along an axis perpendicular to the reaction plane. This polarization differs from that reported in the (7Li, t) reaction, when the same nuclear levels were populated. D.W.B.A. calculations which fitted both angular distributions and polarization in the (7Li, t) reaction and which can also describe the (16O, 12C) angular distributions fail to reproduce the associated 20Ne* polarization.
- Published
- 1977
- Full Text
- View/download PDF
20. Excited states of 19N and 21O
- Author
-
D. Guillemaud, P. Roussel, M. Roy-Stephan, M. Langevin, J. de Boer, M. Bernas, F. Pougheon, C. Détraz, F. Naulin, 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
Nuclear reaction ,sup 18 O sup 18 O ,sup 21 O ,1.59 MeV ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,7. Clean energy ,1.12 MeV ,nuclei with mass number 6 to 19 ,0103 physical sciences ,sup 19 N nuclear reaction ,sup 19 N mass ,010306 general physics ,sup 21 O nuclear reaction ,Physics ,nuclei with mass number 20 to 38 ,010308 nuclear & particles physics ,General Engineering ,nuclear energy levels ,3.00 MeV ,1.35 MeV ,nuclear mass ,excited state energies ,Excited state ,[PHYS.HIST]Physics [physics]/Physics archives ,Atomic physics ,sup 18 O ,sup 19 N - Abstract
(18O, 19N) and (18O, 21O) nuclear reactions on a 18O target provide measurements of excited state energies at 1.12 and 1.59 MeV for 19N and at 1.35 and 3.00 MeV for 21O. The 19N mass is remeasured as 15.856 ± 0.050 MeV.
- Published
- 1982
- Full Text
- View/download PDF
21. The spectroscopy of neutron-rich sdf-shell nuclei using the CLARA-PRISMA setup
- Author
-
A. Latina, S. Beghini, G. de Angelis, D. Curien, Zs. Dombrádi, D. Verney, M. Stanoiu, D. R. Napoli, A. Hodsdon, M. Trotta, E. Fioretto, K. Keyes, F. Haas, G. Pollarolo, L. Berti, J. Ollier, F. Ibrahim, Alick Deacon, F. Azaiez, A. Jungclaus, V. F. E. Pucknell, A. Papenberg, D. Bazzacco, J. F. Smith, G. Montagnoli, B. R. Behera, J. Wrzesiński, A. M. Stefanini, R. Chapman, E. Farnea, Fernando Scarlassara, K. M. Spohr, N. Margineau, L. Corradi, N. Toniolo, Roberto Menegazzo, F. Nowacki, Z. M. Wang, M. Burns, X. Liang, M.-D. Salsac, A. Gadea, E. Caurier, Suzana Szilner, 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), 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), 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), L.Corradi, D.Ackermann, E.Fioretto, A.Gadea, F.Haas, G.Pollarolo, F.Scarlassara, S.Szilner, M.Trotta, 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), 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 Corradi, L. et al. ..., Szilner, S.
- Subjects
spectroscopy ,Spin states ,Nuclear Theory ,02 engineering and technology ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,21.60.Cs, 27.30.+t, 25.70.Lm, 29.30.-h ,Nuclear physics ,0202 electrical engineering, electronic engineering, information engineering ,Gamma spectroscopy ,Neutron ,phosphorus ,Spectroscopy ,Nuclear Experiment ,Physics ,neutron-rich N=20 and 28 nuclei ,spectroscopy of ^36Si ,^37P ,deep-inelastic processes ,nuclei with mass number 20 to 38 ,Projectile ,deep inelastic heavy ion reactions ,Nuclear shell model ,neutrons ,silicon ,020206 networking & telecommunications ,Deep inelastic scattering ,Neutron spectroscopy ,nuclear shell model ,020201 artificial intelligence & image processing ,Atomic physics - Abstract
Since the discovery of the breakdown of shell effects in very neutron-rich N=20 and 28 nuclei, studies of the properties of nuclei far from stability have been of intense interest since they provide a unique opportunity to increase our understanding of nuclear interactions in extreme conditions and often challenge our theoretical models. Deep-inelastic processes can be used to populated high spin states of neutron-rich nuclei. In the deep-inelastic processes, an equilibration in N/Z between the target and projectile nuclei is achieved. For most heavy neutron-rich target nuclei, the N/Z ratio is 1.5 - 1.6, while for the possible neutron-rich sdf-shell projectile it is about 1.2. Thus by using deep-inelastic processes one can populate neutron-rich nuclei around N=20 and N=28. New results for the spectroscopy of neutron-rich N=22 ^36Si and ^37P are presented here.
- Full Text
- View/download PDF
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.