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1. Constraint of the Astrophysical $^{26g}$Al(p;γ)$^{27}$Si Destruction Rate at Stellar Temperatures

Author

S D, Pain, D W, Bardayan, J C, Blackmon, S M, Brown, K Y, Chae, K A, Chipps, J A, Cizewski, K L, Jones, R L, Kozub, J F, Liang, C, Matei, M, Matos, B H, Moazen, C D, Nesaraja, J, Okołowicz, P D, O'Malley, W A, Peters, S T, Pittman, M, Płoszajczak, K T, Schmitt, J F, Shriner, D, Shapira, M S, Smith, D W, Stracener, G L, Wilson, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.GA]Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], 24.50.+g, 26.20.Np, 26.20.-f, 26.30.-k, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics::Galaxy Astrophysics
Abstract

International audience; The Galactic 1.809-MeV γ-ray signature from the β decay of $^{26g}$Al is a dominant target of γ-rayastronomy, of which a significant component is understood to originate from massive stars. The$^{26g}$Al(p; γ)$^{27}$Si reaction is a major destruction pathway for $^{26g}$Al at stellar temperatures, but the reactionrate is poorly constrained due to uncertainties in the strengths of low-lying resonances in $^{27}$Si. The$^{26g}$Al(d; p)$^{27}$Al reaction has been employed in inverse kinematics to determine the spectroscopic factors,and hence resonance strengths, of proton resonances in $^{27}$Si via mirror symmetry. The strength of the127-keV resonance is found to be a factor of 4 higher than the previously adopted upper limit, and the upperlimit for the 68-keV resonance has been reduced by an order of magnitude, considerably constraining the$^{26g}$Al destruction rate at stellar temperatures.

Published
2015
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2. Search for molecular states in $^{16}$C

Author

K. L. Jones, J. L. Lecouey, N. M. Clarke, N. A. Orr, L. Stuttge, L Achouri, P. J. Leask, S. P. G. Chappell, J. C. Angélique, R. Chapman, L. Donadille, B.R. Fulton, C. A. Bremner, S. Grévy, F. Hanappe, M. P. Nicoli, B. Benoit, M. Shawcross, M. B. Smith, R.C. Lemmon, F. M. Marqués, S M Singer, X. Liang, Alain Ninane, E. de Goes Brennard, Martin Freer, M. Lewitowicz, K. M. Spohr, W. N. Catford, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut 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), 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
Physics, Nuclear reaction, Nuclear and High Energy Physics, Isotope, 010308 nuclear & particles physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Crystallography, Helium-4, Isotopes of carbon, Quantum mechanics, Excited state, 0103 physical sciences, Molecule, 010306 general physics, Isotopes of beryllium, Isotopes of helium
Abstract

In order to search for a proposed α:2n:α:2n:α molecular structure in 16C its break-up into 10Be + 6He, 12Be + α, 8He + 2α and 6He + 6He + α has been studied using a 560 MeV 16C beam inelastically excited on a 12C target. States in 16C appear to be only weakly populated in this reaction.

Published
2001
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3. The 8+ isomer in $^{78}$Zn and the doubly magic character of $^{78}$Ni

Author

R. Béraud, R.C. Lemmon, M. Sawicka, R. Bentida, W. N. Catford, H. Grawe, L. Achouri, F. Nowacki, F. de Oliveira Santos, G. Sletten, M. Pfützner, J. C. Angélique, J. M. Daugas, C. Borcea, K. P. Rykaczewski, P. H. Regan, D. Baiborodin, K. L. Jones, A. Emsallem, M. J. Lopez Jimenez, Robert Grzywacz, K. Bennaceur, J. E. Sauvestre, M. Lewitowicz, C. R. Bingham, M. Stanoiu, 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), 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 de Lyon (IPNL), 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), 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), 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-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), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, scientific edition, SHELL model, Parity assignment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Open Access, Humanities, Fragmentation (mass spectrometry), Open Archives, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Nuclear Physics
Abstract

A new isomeric state in 78Zn has been identified and studied in the fragmentation of a 60.5 AMeV 86Kr beam on a natNi target. The measured energies of the transitions and the half-life, T1/2=319(9) ns, of the isomeric decay suggest a spin and parity assignment F=S+. The deduced B(E2,S+ -+ 6+) value equals 1.21(5) W.u. is well reproduced in large scale shell model calculations using realistic interactions in the proton-neutron 2p3/2, 1f5/2' 2p1/2' 199 / 2 model space. Standard E2 polarisation charges of D.5e for both protons and neutrons were used. This result consists the first experimental evidence of the persistance of the N=50 shell gap in the vicinity f 78N' o 28 150·

Published
2000
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4. Gamow-Teller and Fermi decay of N=Z nuclei above A=70

Author

B. Greenhalgh, B. Blank, R. M. Clark, C. Longour, L. Frankland, O. Sorlin, K. L. Jones, A. Knipper, M. Lewitowicz, W. Gelletly, C. Chandler, Marie K. Harder, R. D. Page, W. N. Catford, P. H. Regan, D. Applebe, I. Piqueras, Leif Axelsson, A. Jokinen, M.J.G. Borge, A. Huck, V. Rauch, J. M. Daugas, O. Tengblad, J. Giovinazzo, A.T. Reed, Alison Bruce, R. Wadsworth, N. S. Kelsall, T. Kszczot, A. Fleury, Ch. Miehé, J. Garcés Narro, M. Ramdhane, S. Czajkowski, Robert Grzywacz, D. M. Cullen, P. Dessagne, C. J. Pearson, 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), 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), Rubio B.Lozano M.Gelletly W., and Robert, Suzanne

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Electron capture, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Nuclear physics, medicine, Nuclear Experiment, Isotope, ComputingMilieux_THECOMPUTINGPROFESSION, Chemistry, Nuclear structure, document, organization, Beta decay, editorial processes, ComputingMilieux_MANAGEMENTOFCOMPUTINGANDINFORMATIONSYSTEMS, medicine.anatomical_structure, workplace, ComputingMilieux_COMPUTERSANDSOCIETY, Atomic physics, Ground state, Nucleus, Radioactive decay, information activity, Fermi Gamma-ray Space Telescope
Abstract

The study of the β decay of some N=Z nuclei in the A=70 mass range have been performed using the GANIL and CERN/ISOLDE facilities. The fast decays of three Tz=0 odd-odd nuclei have been measured for the first time which extend the number of superallowed transitions. Information has been obtained on the Gamow Teller strength distribution in the β+-EC decay of two even-even N=Z isotopes 76Sr and 72Kr. Results are compared with theoretical predictions giving indication about the shape of the ground state of the parent nucleus.

Published
1999

5. Spatial patterns of fasting and fed antropyloric pressure waves in humans

Author

W. M. Sun, G. S. Hebbard, C.-H. Malbert, K. L. Jones, S. Doran, M. Horowitz, J. Dent, ProdInra, Migration, Station de recherches porcines, and Institut National de la Recherche Agronomique (INRA)

Subjects
Adult, Male, Time Factors, Physiology, Duodenum, [SDV]Life Sciences [q-bio], Biology, 03 medical and health sciences, 0302 clinical medicine, Healthy volunteers, medicine, Pressure, Pyloric Antrum, Humans, Antrum, Gastric wall, Pylorus, Stomach, digestive, oral, and skin physiology, Anatomy, Fasting, Middle Aged, Postprandial Period, Gastric pressure, [SDV] Life Sciences [q-bio], medicine.anatomical_structure, 030220 oncology & carcinogenesis, 030211 gastroenterology & hepatology, Female, Research Article
Abstract

1. Gastric mechanics were investigated by categorizing the temporal and spatial patterning of pressure waves associated with individual gastric contractions. 2. In twelve healthy volunteers, intraluminal pressures were monitored from nine side hole recording points spaced at 1.5 cm intervals along the antrum, pylorus and duodenum. 3. Pressure wave sequences that occurred during phase II fasting contractions (n = 221) and after food (n = 778) were evaluated. 4. The most common pattern of pressure wave onset along the antrum was a variable combination of antegrade, synchronous and retrograde propagation between side hole pairs. This variable pattern accounted for 42% of sequences after food, and 34% during fasting (P < 0.05). Other common pressure wave sequence patterns were: purely antegrade-29% after food and 42% during fasting (P < 0.05); purely synchronous-23% fed and 17% fasting; and purely retrograde-6% fed and 8% fasting. The length of sequences was shorter after food (P < 0.05). Some sequences 'skipped' individual recording points. 5. The spatial patterning of gastric pressure wave sequences is diverse, and may explain the differing mechanical outcomes among individual gastric contractions. 6. Better understanding of gastric mechanics may be gained from temporally precise correlations of luminal flows and pressures and gastric wall motion during individual gastric contraction sequences.

Published
1997

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