Search

Your search keyword '"Buchmann, L."' showing total 17 results
Start Over Author "Buchmann, L." Journal aip conference proceedings
17 results on '"Buchmann, L."'

1. Improving the [sup 33]S(p,γ)[sup 34]Cl Reaction Rate for Models of Classical Nova Explosions

Author

Parikh, A., primary, Faestermann, Th., additional, Krücken, R., additional, Bildstein, V., additional, Bishop, S., additional, Eppinger, K., additional, Herlitzius, C., additional, Lepyoshkina, O., additional, Maierbeck, P., additional, Seiler, D., additional, Wimmer, K., additional, Hertenberger, R., additional, Wirth, H.-F., additional, Fallis, J., additional, Hager, U., additional, Hutcheon, D., additional, Ruiz, Ch., additional, Buchmann, L., additional, Ottewell, D., additional, Freeman, B., additional, Wrede, Ch., additional, García, A., additional, Delbridge, B., additional, Knecht, A., additional, Sallaska, A., additional, Chen, A. A., additional, Clark, J. A., additional, Deibel, C. M., additional, Fulton, B., additional, Laird, A., additional, Greife, U., additional, Guo, B., additional, Li, E., additional, Li, Z., additional, Lian, G., additional, Wang, Y., additional, Liu, W., additional, Parker, P. D., additional, Setoodehnia, K., additional, Demetriou, Paraskevi, additional, Julin, Rauno, additional, and Harissopulos, Sotirios, additional

Published
2011
Full Text
View/download PDF

2. Elastic scattering of [sup 9]Li on [sup 208]Pb at energies around the Coulomb barrier

Author

Cubero, M., primary, Fernández-García, J. P., additional, Lay, J. A., additional, Acosta, L., additional, Alcorta, M., additional, Alvarez, M. A. G., additional, Borge, M. J. G., additional, Buchmann, L., additional, Diget, D. G., additional, Fulton, B., additional, Fynbo, H. O. U., additional, Galaviz, D., additional, Gómez-Camacho, J., additional, Martel, I., additional, Moro, A. M., additional, Mukha, I., additional, Nilsson, T., additional, Sánchez-Benítez, A. M., additional, Shotter, A., additional, Tengblad, O., additional, Walden, P., additional, Demetriou, Paraskevi, additional, Julin, Rauno, additional, and Harissopulos, Sotirios, additional

Published
2011
Full Text
View/download PDF

3. First Results with TIGRESS and Accelerated Radioactive Ion Beams from ISAC: Coulomb Excitation of [sup 20,21,29]Na

Author

Schumaker, M. A., primary, Hurst, A. M., additional, Svensson, C. E., additional, Wu, C. Y., additional, Becker, J. A., additional, Cline, D., additional, Hackman, G., additional, Pearson, C. J., additional, Stoyer, M. A., additional, Andreyev, A., additional, Austin, R. A. E., additional, Ball, G. C., additional, Bandyopadhyay, D., additional, Barton, C. J., additional, Boston, A. J., additional, Boston, H. C., additional, Buchmann, L., additional, Churchman, R., additional, Cifarelli, F., additional, Colosimo, S. J., additional, Cooper, R. J., additional, Cross, D. S., additional, Dashdorj, D., additional, Demand, G. A., additional, Dimmock, M. R., additional, Djongolov, M., additional, Drake, T. E., additional, Finlay, P., additional, Gallant, A. T., additional, Garrett, P. E., additional, Gray-Jones, C., additional, Green, K. L., additional, Grint, A. N., additional, Grinyer, G. F., additional, Harkness, L. J., additional, Hayes, A. B., additional, Kanungo, R., additional, Leach, K. G., additional, Kulp, W. D., additional, Lisetskiy, A. F., additional, Lee, G., additional, Lloyd, S., additional, Maharaj, R., additional, Martin, J.-P., additional, Millar, B. A., additional, Moisan, F., additional, Morton, A. C., additional, Mythili, S., additional, Nelson, L., additional, Newman, O., additional, Nolan, P. J., additional, Orce, J. N., additional, Oxley, D. C., additional, Padilla-Rodal, E., additional, Phillips, A. A., additional, Porter-Peden, M., additional, Ressler, J. J., additional, Rigby, S. V., additional, Roy, R., additional, Ruiz, C., additional, Sarazin, F., additional, Scraggs, D. P., additional, Sumithrarachchi, C. S., additional, Triambak, S., additional, Waddington, J. C., additional, Walker, P. M., additional, Wan, J., additional, Whitbeck, A., additional, Williams, S. J., additional, Wong, J., additional, Wood, J. L., additional, McDaniel, Floyd D., additional, and Doyle, Barney L., additional

Published
2009
Full Text
View/download PDF

4. Charged-particle channels in the β-decay of [sup 11]Li

Author

Raabe, R., primary, Andreyev, A., additional, Borge, M. J. G., additional, Buchmann, L., additional, Capel, P., additional, Fynbo, H. O. U., additional, Huyse, M., additional, Kanungo, R., additional, Kirchner, T., additional, Mattoon, C., additional, Morton, A. C., additional, Mukha, I., additional, Pearson, J., additional, Ponsaers, J., additional, Ressler, J. J., additional, Riisager, K., additional, Ruiz, C., additional, Ruprecht, G., additional, Sarazin, F., additional, Tengblad, O., additional, Van Duppen, P., additional, Walden, P., additional, Ferreira, Lídia S., additional, and Arumugan, Paramasivan, additional

Published
2007
Full Text
View/download PDF

5. Improving the 33S(p,γ)34Cl Reaction Rate for Models of Classical Nova Explosions.

Author

Parikh, A., Faestermann, Th., Krücken, R., Bildstein, V., Bishop, S., Eppinger, K., Herlitzius, C., Lepyoshkina, O., Maierbeck, P., Seiler, D., Wimmer, K., Hertenberger, R., Wirth, H.-F., Fallis, J., Hager, U., Hutcheon, D., Ruiz, Ch., Buchmann, L., Ottewell, D., and Freeman, B.

Subjects
SUPERNOVAE, NUCLEAR reactions, NUCLEOSYNTHESIS, NUCLEAR astrophysics, CALCIUM isotopes, ASTRONOMICAL observations, DWARF stars
Abstract

Reduced uncertainty in the thermonuclear rate of the 33S(p,γ)34Cl reaction would help to improve our understanding of nucleosynthesis in classical nova explosions. At present, models are generally in concordance with observations that nuclei up to roughly the calcium region may be produced in these explosive phenomena; better knowledge of this rate would help with the quantitative interpretation of nova observations over the S-Ca mass region, and contribute towards the firm establishment of a nucleosynthetic endpoint. As well, models find that the ejecta of nova explosions on massive oxygen-neon white dwarfs may contain as much as 150 times the solar abundance of 33S. This characteristic isotopic signature of a nova explosion could possibly be observed through the analysis of microscopic grains formed in the environment surrounding a nova and later embedded within primitive meteorites. An improved 33S(p,γ)34Cl rate (the principal destruction mechanism for 33S in novae) would help to ensure a robust model prediction for the amount of 33S that may be produced. Finally, constraining this rate could confirm or rule out the decay of an isomeric state of 34Cl (Ex = 146 keV, t1/2 = 32 m) as a source for observable gamma-rays from novae. We have performed several complementary experiments dedicated to improving our knowledge of the 33S(p,γ)34Cl rate, using both indirect methods (measurement of the 34S(3He,t)34Cl and 33S(3He,d)34Cl reactions with the Munich Q3D spectrograph) and direct methods (in normal kinematics at CENPA, University of Washington, and in inverse kinematics with the DRAGON recoil mass separator at TRIUMF). Our results will be used with nova models to facilitate comparisons of model predictions with present and future nova observables. [ABSTRACT FROM AUTHOR]

Published
2011
Full Text
View/download PDF

6. First Results with TIGRESS and Accelerated Radioactive Ion Beams from ISAC: Coulomb Excitation of 20,21,29Na.

Author

Schumaker, M. A., Hurst, A. M., Svensson, C. E., Wu, C. Y., Becker, J. A., Cline, D., Hackman, G., Pearson, C. J., Stoyer, M. A., Andreyev, A., Austin, R. A. E., Ball, G. C., Bandyopadhyay, D., Barton, C. J., Boston, A. J., Boston, H. C., Buchmann, L., Churchman, R., Cifarelli, F., and Colosimo, S. J.

Subjects
GAMMA rays, COULOMB excitation, SPECTRUM analysis, ION bombardment, GERMANIUM
Abstract

The TRIUMF-ISAC Gamma-Ray Escape Suppressed Spectrometer (TIGRESS) is a state-of-the-art γ-ray spectrometer being constructed at the ISAC-II radioactive ion beam facility at TRIUMF. TIGRESS will be comprised of twelve 32-fold segmented high-purity germanium (HPGe) clover-type γ-ray detectors, with BGO/CsI(Tl) Compton-suppression shields, and is currently operational at ISAC-II in an early-implementation configuration of six detectors. Results have been obtained for the first experiments performed using TIGRESS, which examined the A = 20, 21, and 29 isotopes of Na by Coulomb excitation. [ABSTRACT FROM AUTHOR]

Published
2009
Full Text
View/download PDF

7. Charged-particle channels in the β-decay of 11Li.

Author

Raabe, R., Andreyev, A., Borge, M. J. G., Buchmann, L., Capel, P., Fynbo, H. O. U., Huyse, M., Kanungo, R., Kirchner, T., Mattoon, C., Morton, A. C., Mukha, I., Pearson, J., Ponsaers, J., Ressler, J. J., Riisager, K., Ruiz, C., Ruprecht, G., Sarazin, F., and Tengblad, O.

Subjects
BETA decay, ELECTRON emission, SILICON diodes, SPECTRUM analysis, IONS
Abstract

We measured the β-decay of the halo-nucleus 11Li, with particular attention to the deuteron- and triton-emission channels. We employed a post-accelerated beam of 11Li ions, and the implantation technique in a finely-segmented silicon detector. The channels of interest were identified through the time and space correlations between the implantation events and the parent and daughter decays. We obtained the branching ratios, as well as the spectra of the emitted ions. [ABSTRACT FROM AUTHOR]

Published
2007
Full Text
View/download PDF

9. Measurement of the 21Na(p,γ)22Mg Reaction with the Dragon Facility at TRIUMF-ISAC.

Author

Chen, A.A., Bishop, S., Buchmann, L., Chatterjee, M.L., D'Auria, J.M., Engel, S., Gigliotti, D., Greife, U., Hunter, D., Hussein, A., Hutcheon, D.A., Jewett, C., King, J., Kubono, S., Laird, A., Lamey, M., Lewis, R., Liu, W., Michimasa, S., and Olin, A.

Subjects
RADIOACTIVE nuclear beams, MACHINE separators, PROTON capture, ALPHA rays
Abstract

The DRAGON recoil separator facility, designed to measure the rates of radiative proton and alpha capture reactions important for nuclear astrophysics, is now operational at the TRIUMF-ISAC radioactive beam facility in Vancouver, Canada. We report on first measurements of the 21Na(p,γ)22Mg reaction rate with radioactive beams of 21Na. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2003
Full Text
View/download PDF

10. Search for scalar contributions to the [sup 38m]Kβ[sup +]−ν correlation in a magneto-optic trap

Author

Behr, J. A., primary, Gorelov, A., additional, Melconian, D., additional, Trinczek, M., additional, Dubé, P., additional, Häusser, O., additional, Giesen, U., additional, Jackson, K. P., additional, Swanson, T., additional, D’Auria, J. M., additional, Dombsky, M., additional, Ball, G., additional, Buchmann, L., additional, Jennings, B., additional, Dilling, J., additional, Schmid, J., additional, Deutsch, J., additional, Alford, W. P., additional, Asgeirsson, D., additional, and Wong, W., additional

Published
1999
Full Text
View/download PDF

11. Measurement of the half-life of 44Ti

Author

Meissner, J., primary, Görres, J., additional, Schatz, H., additional, Vouzoukas, S., additional, Wiescher, M., additional, Buchmann, L., additional, Bazin, D., additional, Brown, J. A., additional, Hellström, M., additional, Kelley, J. H., additional, Kryger, R. A., additional, Morrissey, D. J., additional, Steiner, M., additional, Scheller, K. W., additional, and Boyd, R. N., additional

Published
1995
Full Text
View/download PDF

16. Elastic scattering of 9Li on 208Pb at energies around the Coulomb barrier.

Author

Cubero, M., Fernández-García, J. P., Lay, J. A., Acosta, L., Alcorta, M., Alvarez, M. A. G., Borge, M. J. G., Buchmann, L., Diget, D. G., Fulton, B., Fynbo, H. O. U., Galaviz, D., Gómez-Camacho, J., Martel, I., Moro, A. M., Mukha, I., Nilsson, T., Sánchez-Benítez, A. M., Shotter, A., and Tengblad, O.

Subjects
ELASTIC scattering, LITHIUM isotopes, LEAD isotopes, COULOMB potential, POTENTIAL barrier, NUCLEAR structure, ANGULAR distribution (Nuclear physics)
Abstract

We have studied the dynamical effects of the halo structure of 11Li on the scattering on heavy targets at energies around the Coulomb barrier. This experiment was performed at ISAC-II at TRIUMF with a world record in production of the post-accelerated 11Li beam. As part of this study we report here on the first measurement of the elastic cross section of the core nucleus, i.e. 9Li on 208Pb, at energies around the Coulomb barrier. A preliminary optical model analysis has been performed in order to extract a global optical potential to describe the measured angular distributions. [ABSTRACT FROM AUTHOR]

Published
2011
Full Text
View/download PDF

17. Study Of The Scattering Of Halo Nuclei Around The Coulomb Barrier.

Author

Acosta, L., Cubero, M., Escrig, D., Fernández-García, J. P., Lay, J. A., Moro, A. M., Rodríguez-Gallardo, M., Sánchez-Benítez, A. M., Alcorta, M., Álvarez, M. A. G., Andrés, M. V., Angulo, C., Borge, M. J. G., Buchmann, L., Cabrera, J., Cherubini, S., Cortés, M. A., Demaret, P., Diget, C. G., and Di Pietro, A.

Subjects
RADIOISOTOPES, POTENTIAL barrier, SCATTERING (Physics), EXOTIC nuclei, NUCLEAR reactions, HELIUM isotopes, BERYLLIUM isotopes, LITHIUM isotopes
Abstract

During the past ten years the present collaboration has carried out several experiments related with the study of radioactive nuclei. One of the topics in which we have centered our research, is the scattering of halo nuclei at energies around the Coulomb barrier. As part of this study, we present in this work a review of the results obtained from the scattering of 6He, 11Be and 11Li. The presence of a 'halo' in these exotic nuclei is found to have a striking effect on the dynamics of these reactions, making their study an interesting experimental problem and a challenge for existing reaction theories. [ABSTRACT FROM AUTHOR]

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results