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13 results on '"R. Chevrier"'

1. Novel method for the production of spin-aligned RI beams in projectile fragmentation with the dispersion matching technique

Author

N. Aoi, Hideki Ueno, R. Chevrier, Hiroshi Watanabe, Takeshi Furukawa, Tetsuya Ohnishi, Y. Ishii, Daisuke Kameda, Masato Tsuchiya, G. Georgiev, H. Takeda, H. Iijima, T. Kubo, Tsubasa Nanao, H. Hayashi, N. Inabe, J. M. Daugas, Masayasu Ishihara, Dimiter L. Balabanski, M. Rajabali, T. Inoue, Akihiro Yoshimi, Koichiro Asahi, Yuichi Ichikawa, Naoki Fukuda, K. Suzuki, 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), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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)-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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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, Nuclear and High Energy Physics, Matching (graph theory), 010308 nuclear & particles physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Present method, Dispersion (optics), 0103 physical sciences, Nuclear spin, Figure of merit, Physics::Accelerator Physics, spin-aligned RI beams, Nuclear moment, projectile fragment, Physical and Theoretical Chemistry, Atomic physics, Spin (physics), 010306 general physics, Nuclear Experiment, RI beam, Projectile fragmentation, Beam (structure)
Abstract

A novel method to produce spin-aligned rare-isotope (RI) beam has been developed, that is the two-step projectile fragmentation method with a technique of dispersion matching. The present method was verified in an experiment at the RIKEN RIBF, where an RI beam of 32Al with spin alignment of 8(1) % was successfully produced from a primary beam of 48Ca, with 33Al as an intermediate nucleus. Figure of merit of the present method was found to be improved by a factor larger than 50 compared with a conventional method employing single-step projectile fragmentation. ispartof: pages:47-51 ispartof: Hyperfine Interactions vol:220 issue:1 pages:47-51 ispartof: 4th Joint International Conference on Hyperfine Interactions / International Symposium on Nuclear Quadrupole Interactions (HFI/NQI) location:Beijing, China date:10 Sep - 14 Sep 2012 status: published

Published
2013

2. High-precision quadrupole moment reveals significant intruder component inAl201333ground state

Author

P. Morel, Akihiro Yoshimi, Yoko Ishibashi, Mustafa Rajabali, T. J. Mertzimekis, Alfredo Poves, Yuichi Ichikawa, H. Heylen, L. Caceres, Yutaka Utsuno, Gerda Neyens, Naohiro Yoshida, J. Papuga, J. C. Thomas, Mark Bissell, R. Chevrier, O. Kamalou, Hideki Ueno, M. De Rydt, J. M. Daugas, and C. Stodel

Subjects
Physics, Coupling constant, 010308 nuclear & particles physics, Island of inversion, Nuclear Theory, 01 natural sciences, 0103 physical sciences, Quadrupole, Atomic physics, 010306 general physics, Ground state, Nuclear quadrupole resonance, Wave function, Electric field gradient, Excitation
Abstract

The electric quadrupole moment of the $_{13}^{33}\mathrm{Al}_{20}$ ground state, located at the border of the island of inversion, was obtained using continuous-beam $\ensuremath{\beta}$-detected nuclear quadrupole resonance ($\ensuremath{\beta}$-NQR). From the measured quadrupole coupling constant ${\ensuremath{\nu}}_{Q}=2.31(4)$ MHz in an $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ crystal, a precise value for the electric quadrupole moment is extracted: $\left|{Q}_{s}\left(^{33}\mathrm{Al}\right)\right|=141(3)$ mb. A comparison with large-scale shell model calculations shows that $^{33}\mathrm{Al}$ has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the $N=20$ shell gap. $^{33}\mathrm{Al}$ therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal $Z\ensuremath{\ge}14$ isotopes.

Published
2016

3. Nearly degenerate isomeric states ofCu75

Author

M. Stanoiu, L. Gaudefroy, R. Borcea, O. Sorlin, O. Kamalou, C. Plaisir, S. Calinescu, F. Rotaru, C. Petrone, C. Borcea, T. Faul, G. Gey, J. C. Thomas, G. S. Simpson, L. Caceres, R. Chevrier, J. M. Daugas, F. Negoita, and G. Georgiev

Subjects
Physics, Valence (chemistry), 010308 nuclear & particles physics, 0103 physical sciences, Degenerate energy levels, Atomic physics, Nuclear Experiment, 010306 general physics, Spectroscopy, 01 natural sciences
Abstract

The decays of two isomeric states in the neutron-rich nucleus $^{75}\mathrm{Cu}$ have been studied via delayed $\ensuremath{\gamma}$-ray spectroscopy. These states were populated by the fragmentation of a $60.4\phantom{\rule{4pt}{0ex}}A\phantom{\rule{0.16em}{0ex}}\mathrm{MeV} ^{86}\mathrm{Kr}$ primary beam, which impinged on a Be target at the LISE2k spectrometer of GANIL. Isomeric half-lives and branching ratios were measured, and a $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidence analysis performed. These have allowed a revised level scheme of $^{75}\mathrm{Cu}$ to be proposed. A comparison with large-scale shell-model calculations using different effective interactions and valence spaces shows the importance of proton excitations across the $Z=28$ shell gap for reproducing the energy spacing between the isomeric states. The coexisting collective and single-particle properties of the $(1/{2}^{\ensuremath{-}})$ and $(3/{2}^{\ensuremath{-}})$ states, respectively, are similar to those of the same states in the neighboring $^{69,71,73}\mathrm{Cu}$. The small energy spacings between the $(1/{2}^{\ensuremath{-}}), (3/{2}^{\ensuremath{-}})$, and $5/{2}^{\ensuremath{-}}$ states are responsible for the isomerism.

Published
2016

4. Magnetic moment of the13/2+isomeric state inCu69: Spin alignment in the one-nucleon removal reaction

Author

Hiroki Nishibata, Yuichi Ichikawa, Alain Goasduff, H. Miyatake, M. Bostan, Hazuki Shirai, Y. Saito, Y. Ishii, Georgi P. Georgiev, D. Nagae, Tsubasa Nanao, Masatoshi Chikamori, Deyan T. Yordanov, R. Chevrier, Megumi Niikura, A. Kusoglu, Hideki Ueno, Yasushi Abe, R. Lozeva, Takeshi Furukawa, Susumu Okada, T. Niwa, Naohiro Yoshida, J. M. Daugas, Yoko Ishibashi, D. L. Balabanski, A. Ozawa, Koichiro Asahi, and C. Sotty

Subjects
Physics, Magnetic moment, 010308 nuclear & particles physics, g factor, SHELL model, 7. Clean energy, 01 natural sciences, Angular distribution, medicine.anatomical_structure, Fragmentation (mass spectrometry), 0103 physical sciences, medicine, Atomic physics, 010306 general physics, Spin (physics), Nucleon, Nucleus
Abstract

We report on a new measurement of the g factor of the (13/2(+)) isomeric state in the neutron-rich nucleus Cu-69. This study demonstrates the possibility of obtaining considerable nuclear spin alignment for multi-quasiparticle states in single-nucleon removal reactions. The time-dependent perturbed angular distribution (TDPAD) method was used to extract the gyromagnetic factor of the (13/2(+)) [T-1/2 = 351(14) ns] isomeric state of Cu-69. Its g factor was obtained as g(13/2(+)) = 0.248( 9). The experimentally observed spin alignment for the state of interest was deduced as A = -3.3(9)%.

Published
2016

5. Spin-aligned RI beams via two-step fragmentation reactions

Author

G. Georgiev, Akihiro Yoshimi, Yuichi Ichikawa, T. Kubo, N. Aoi, Naoki Fukuda, K. Suzuki, H. Iijima, H. Hayashi, Dimiter L. Balabanski, M. Rajabali, Masayasu Ishihara, Tsubasa Nanao, J. M. Daugas, Hideki Ueno, T. Inoue, Masato Tsuchiya, Y. Ishii, Daisuke Kameda, R. Chevrier, Tetsuya Ohnishi, Hiroshi Watanabe, Koichiro Asahi, Takeshi Furukawa, H. Takeda, N. Inabe, 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), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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)-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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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 and High Energy Physics, Nuclear moments, 010308 nuclear & particles physics, Chemistry, Two step, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Fragmentation (mass spectrometry), Present method, 0103 physical sciences, Nuclear spin, Figure of merit, Nuclear moment, Atomic physics, 010306 general physics, Spin (physics), Nuclear Experiment, RI beam, Instrumentation, Projectile fragmentation, Beam (structure)
Abstract

A method to produce spin-aligned rare isotope (RI) beams has been developed, where a scheme of twostep projectile fragmentation to produce the RI of interest with high spin alignment and a technique of momentum-dispersion matching are combined. Effectiveness of the present method was demonstrated in an experiment at the RIKEN RIBF, where an RI beam of 32Al with spin alignment of 8(1)% was successfully produced from a primary beam of 48Ca, via an intermediate RI of 33Al. Figure of merit of the present method was found to be more than 50 times greater than that of the conventional method employing single-step projectile fragmentation. ispartof: Nuclear Instruments & Methods in Physics Research B vol:317 pages:769-773 ispartof: location:JAPAN, RIKEN Nishina Ctr Accelerator Based Sci, Matsue status: published

Published
2013

6. Unveiling the Intruder Deformed02+State inSi34

Author

A. Buta, R. Borcea, C. Petrone, L. Caceres, D. Lebhertz, S. Calinescu, O. Sorlin, J. C. Thomas, S. Grévy, Alfredo Poves, J. Mrazek, R. Chevrier, J. M. Daugas, S. M. Lukyanov, M. Stanoiu, F. Rotaru, D. Sohler, Frédéric Nowacki, Y. E. Penionzhkevich, C. Borcea, Zs. Dombrádi, and F. Negoita

Subjects
Czech, 010308 nuclear & particles physics, Romanian, Foundation (engineering), General Physics and Astronomy, State (functional analysis), 01 natural sciences, language.human_language, Political science, Double beta decay, 0103 physical sciences, language, 010306 general physics, Humanities
Abstract

This work has been supported by BMBF 06BN109, GA of Czech Republic 202/040791, MICINN-FPA2009-13377, CM-HEPHACOSS2009/ESP-1473 (Spain), the EC through the Eurons project Contracts No. RII3-CT-3/2004-506065, No. OTKA K68801, and No. K100835, the Bolyai Foundation, and by Romanian ANCS, CNCS UEFISCDI, Project No. PN-II-RU-TE-2011- 3-0051. R. B., A. B., F. N., and F. R. acknowledge the IN2P3/ CNRS support

Published
2012

7. Is the7/21−Isomer State ofS43Spherical?

Author

Takashi Kubo, H. Hayashi, Stefaan Cottenier, Hiroaki Ueno, H. Haas, J. M. Daugas, Georgi P. Georgiev, Takeshi Furukawa, L. Gaudefroy, D. Kameda, Masato Tsuchiya, Hiroyuki Takeda, Mustafa Rajabali, Gerda Neyens, Tsuyoshi Inoue, Masamichi Ishihara, Tsubasa Nanao, Hiroshi Watanabe, R. Chevrier, Akihiro Yoshimi, Yuichi Ichikawa, Tsuyoshi Ohnishi, H. Iijima, D. L. Balabanski, Koichiro Asahi, Nori Aoi, Y. Ishii, Naoki Fukuda, Michael Hass, Naohito Inabe, K. Suzuki, and N. Vermeulen

Subjects
Physics, Angular distribution, 010308 nuclear & particles physics, 0103 physical sciences, SHELL model, Quadrupole, General Physics and Astronomy, Atomic physics, 010306 general physics, 01 natural sciences, Spherical shape
Abstract

We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in S-43(16)27 [E* = 320.5(5) keV, T-1/2 = 415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, vertical bar Q(s) vertical bar = 23(3) efm(2), is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured vertical bar Q(s) vertical bar, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.

Published
2012

8. gfactor of the 21+state of168Hf

Author

Elizabeth Williams, Robert Casperson, V. Werner, G. Ilie, Z. Berant, J. Qian, R. Chevrier, Andreas Martin Heinz, Ryan Winkler, J. R. Terry, R. F. Casten, D. McCarthy, Tan Ahn, A. Wolf, and D. S. Brenner

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Angular correlation, Pairing, 0103 physical sciences, Quadrupole, State (functional analysis), 010306 general physics, 01 natural sciences, Magnetic field, Mathematical physics
Abstract

The $g$ factor of the ${2}_{1}^{+}$ state of ${}^{168}$Hf was measured using the perturbed angular correlation technique in a static external magnetic field. The result, $g({2}_{1}^{+})=0.17(3)$, is discussed in relation to the systematics of the previously reported $g$ factors in the Hf isotopes and compared to the predictions of several models. An interesting outcome of the analysis presented in this paper has to do with the relatively small result for the $g$ factor. This indicates that in the Hf isotopes, a minimum in the $g$(${2}_{1}^{+}$) dependence on $N$ occurs at $N\ensuremath{\le}98$ and not at midshell, as expected from IBA-2 or large-scale shell-model calculations. The pairing plus quadrupole model of Kumar and Baranger predicts a minimum at $N=98$ and gives the best description of the experimental data. The present result clearly shows the importance of $g$-factor measurements in ``fine-tuning'' among different models.

Published
2012

9. Simultaneous deorientation and lifetime measurement in98Ru using the recoil distance Doppler shift method in inverse Coulomb excitation

Author

R. Chevrier, Mallory Smith, Andreas Martin Heinz, R. J. Casperson, G. Ilie, N. Cooper, V. Anagnostatou, V. Werner, Tan Ahn, J. Jolie, L. Bettermann, D. Radeck, Elizabeth Williams, and D. McCarthy

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Inverse, Order (ring theory), Coulomb excitation, State (functional analysis), 01 natural sciences, symbols.namesake, Recoil, Excited state, 0103 physical sciences, symbols, Atomic physics, 010306 general physics, Doppler effect, Radioactive beam
Abstract

We measured the lifetimes of the ${2}_{1,2}^{+}$ and ${4}_{1}^{+}$ states in ${}^{98}$Ru in order to reduce their uncertainties and resolve the discrepancies in the literature for the lifetime of the ${4}_{1}^{+}$ state. Coulomb excitation in inverse kinematics was used to populate excited states in ${}^{98}$Ru, and the recoil distance doppler shift (RDDS) method was employed using the nNew Yale plunger device (NYPD). This technique combined with inverse Coulomb excitation requires several corrections due to relativistic and deorientation effects but yields high precision lifetimes. The determined ${B}_{4/2}=B({4}_{1}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})/B({2}_{1}^{+}\ensuremath{\rightarrow}{0}_{1}^{+})=1.86(16)$ agrees well with the vibrational limit. In order to analyze the data, a new method for the deorientation correction of RDDS data was developed using the perturbation of experimental angular correlations. The simultaneous measurement of deorientation and lifetime of a given state and its application are discussed. The method is suitable for radioactive beam experiments.

Published
2012

10. Production of spin-controlled rare isotope beams

Author

N. Aoi, J. M. Daugas, R. Chevrier, G. Georgiev, Takeshi Furukawa, Hiroshi Watanabe, Masato Tsuchiya, Hideki Ueno, H. Hayashi, Y. Ishii, N. Inabe, T. Kubo, T. Inoue, Dimiter L. Balabanski, M. Rajabali, Tetsuya Ohnishi, Masayasu Ishihara, H. Iijima, Tsubasa Nanao, H. Takeda, Koichiro Asahi, Akihiro Yoshimi, Yuichi Ichikawa, Naoki Fukuda, K. Suzuki, Daisuke Kameda, 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), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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)-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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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, Light nucleus, Particle properties, Isotope, 010308 nuclear & particles physics, Nuclear structure, General Physics and Astronomy, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Chemical physics, 0103 physical sciences, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Spin (physics), Nuclear Experiment
Abstract

The degree of freedom of spin in quantum systems serves as an unparalleled laboratory where intriguing quantum physical properties can be observed, and the ability to control spin is a powerful tool in physics research. We propose a novel method for controlling spin in a system of rare isotopes which takes advantage of the mechanism of the projectile fragmentation reaction combined with the momentum-dispersion matching technique. The present method was verified in an experiment at the RIKEN RI Beam Factory, in which a degree of alignment of 8% was achieved for the spin of a rare isotope Al-32. The figure of merit for the present method was found to be greater than that of the conventional method by a factor of more than 50., Comment: 18 pages, 5 figures

Published
2012

11. Production of spin-aligned RI beam via two-step fragmentation with dispersion matching

Author

Nori Aoi, J. M. Daugas, K. Suzuki, H. Takeda, Hiroshi Watanabe, H. Hayashi, Takeshi Furukawa, Masato Tsuchiya, D. L. Balabanski, G. Georgiev, Akihiro Yoshimi, Y. Ishii, Yuichi Ichikawa, Mustafa Rajabali, Tsuyoshi Inoue, N. Inabe, T. Kubo, Daisuke Kameda, Koichiro Asahi, N. Fukuda, Masamichi Ishihara, Tsuyoshi Ohnishi, H. Iijima, Hideki Ueno, R. Chevrier, Tsubasa Nanao, 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), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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)-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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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, History, Matching (graph theory), 010308 nuclear & particles physics, business.industry, Two step, 21.10.Hw Spin, parity, and isobaric spin 27.40.+z 39(less-than-or-equal-to)A(less-than-or-equal-to)58 27.30.+t 20(less-than-or-equal-to)A(less-than-or-equal-to)38 21.60.-n Nuclear structure models and methods 25.70.Mn Projectile, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Optics, Fragmentation (mass spectrometry), 0103 physical sciences, Dispersion (optics), Physics::Accelerator Physics, 010306 general physics, business, Focus (optics), Nuclear Experiment, Beam (structure), Spin-½
Abstract

International audience; To produce a radioactive-isotope (RI) beam with high spin alignment, we have developed a novel method, the two-step projectile-fragmentation (PF) method, that employs momentum-dispersion matching. An on-line experiment to produce 32Al from 48Ca via 33Al was performed at RIKEN RI Beam Factory. In the experiment, we succeeded in producing approximately 8% spin alignment in an RI beam of 32Al. In this paper, we focus on evaluating the magnitude of spin alignment realized in one-nucleon removal from 33Al

Published
2012

12. The Orsay universal plunger system

Author

S. Cabaret, M. Niikura, N. Karkour, Georgi P. Georgiev, R. Chevrier, B. Sulignano, D. Linget, J. Ljungvall, M. D. Salsac, I. Matea, G. Sedes, CSNSM SNO, 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)-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 de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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), CSNSM MECA, 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CSNSM ELEC, CSNSM INSTR, 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), 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 de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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)-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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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)-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
Plunger, Physics, Feed back, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Lifetimes, Tandem accelerator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Semiconductor detector, Nuclear physics, In-beam γ-ray spectroscopy, symbols.namesake, Electronic feedback, Excited state, 0103 physical sciences, symbols, Recoil-distance Doppler shift, 010306 general physics, Instrumentation, Doppler effect, Radioactive beam
Abstract

A new plunger device for Recoil-Distance Doppler Shift and Time-Differential Recoil-In-Vacuum measurements has been developed at the CSNSM in collaboration with the IPN Orsay. It is conceived to be easily adapted to different experimental setups and facilities, in particular to the future radioactive beam facility Spiral2. An electronic feedback system keeping the distance between target and stopper foils constant, imperative for precision measurements of short lifetimes, was also developed. The plunger device was commissioned with an experiment performed at the IPN Orsay Tandem accelerator laboratory using the Orgam germanium detector array. Excited states in 76 Kr were populated using the reaction 45 Sc( 35 Cl,2p2n) 76 Kr. The lifetime τ of the 4 1 + state was determined to 4.3(6) ps, in accordance with previous measurement, confirming the functionality of the new plunger device. The commissioning experiment showed in particular that the electronic feed back system works as foreseen.

Published
2012

13. Gamma Spectroscopy of Low-energy Isomeric States in Neutron-rich Nuclei: 75Cu

Author

Georgi P. Georgiev, G. S. Simpson, F. Negoita, C. Petrone, R. Borcea, L. Gaudefroy, O. Sorlin, L. Caceres, R. Chevrier, C. Plaisir, O. Kamalou, Guillaume Gey, J. M. Daugas, S. Calinescu, M. Stanoiu, C. Borcea, F. Rotaru, and J. C. Thomas

Subjects
Nuclear physics, Physics, Low energy, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Gamma spectroscopy, Neutron, 010306 general physics, 01 natural sciences
Published
2013

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